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    <title>Results for Lloyd, R. S.</title>
    <description>Showing 1 - 50 results of 121</description>
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    <item>
      <title>Die Manipulation der Spieleranzahl bei Kleinfeldspielen: Auswirkungen auf numerische Über- und Unterlegenheit in Bezug auf physiologische, körperliche, technische und taktische Leistung</title>
      <pubDate>Thu, 01 Jan 2026 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4097779</link>
      <guid>https://sponet.de/sponet/Record/4097779</guid>
      <author>Rumpf, M. C.</author>
      <author>Jäger, J.</author>
      <author>Lloyd, R. S.</author>
      <author>Lochmann, M.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Mannschaft</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Technik</dc:subject>
      <dc:subject>Taktik</dc:subject>
      <dc:tag>Kleinfeld</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Rumpf, M. C.</dc:creator>
      <dc:creator>Jäger, J.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Lochmann, M.</dc:creator>
      <content:encoded><![CDATA[Small-sided games (SSG) are widely used in soccer training to replicate the physiological, physical, technical, and tactical demands of competition within representative contexts. Coaches often manipulate task constraints by creating numerical superiority or inferiority, which imposes specific demands and elicits targeted adaptations. This review aimed to synthesize the effects of numerical imbalances on player performance across physiological, physical, technical, and tactical domains. Evidence indicates that playing in numerical superiority consistently reduces physiological intensity (e.g., mean heart rate, time >90% HRmax) and high-intensity physical load (e.g., total distance, sprinting, accelerations), while increasing low-intensity activity such as walking. Oppositely, technical performance improves, with a higher number of passes and overall actions. Tactical behavior also adapts, with teams expanding playing length and width, covering more space near the opposition goal, and increasing attacking opportunities, while exploratory behavior and proximity to their own goal decrease. Conversely, teams in numerical inferiority adopt compensatory strategies, focusing on defensive organization and goal protection, which can reduce physical output and exploratory movement, particularly under high-inferiority conditions. Numerical imbalances in SSG seem to modulate physiological load, physical activity, technical execution, and tactical behavior. These findings provide a framework for optimizing training design and session planning in soccer, enabling coaches to manipulate player numbers to target specific performance outcomes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Ballbesitz vs. Torerfolg bei Kleinfeldspielen im Fußball: Eine narrative Mini-Übersichtsarbeit zu den Auswirkungen auf die physiologische, körperliche, technische und taktische Leistung</title>
      <pubDate>Thu, 01 Jan 2026 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4097159</link>
      <guid>https://sponet.de/sponet/Record/4097159</guid>
      <author>Rumpf, M. C.</author>
      <author>Jäger, J.</author>
      <author>Lloyd, R.</author>
      <author>Lochmann, M.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Erfolg</dc:subject>
      <dc:subject>Technik</dc:subject>
      <dc:subject>Taktik</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Spielfeld</dc:subject>
      <dc:subject>Spielform</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Rumpf, M. C.</dc:creator>
      <dc:creator>Jäger, J.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <dc:creator>Lochmann, M.</dc:creator>
      <content:encoded><![CDATA[Different task constraints such as possession play and goal scoring are regularly utilized in small-sided games (SSG) in order to train game specific situations. This narrative mini-review aimed to summarize how these two task constraints influence players' physiological, physical, technical and tactical parameters during SSG. Possession games increase the physiological load of players. Variables such as mean (+4.35%) and max heart rate (+6.43%) as well as duration >90%HRmax (+39.7%) were significantly higher compared to scoring format SSG. Players also felt significantly greater subjective exertion (+24.2%), mental challenge (+18.4%) and lower enjoyment (-6.45%) in comparison to scoring games, especially when goalkeepers participated. Possession games also increased physical strain for players during SSG, with total (+12.6%) and relative (+8.43%) running distance, average moving speed (+14.2%), number of low (+35.9%) and high ACC (+23.6%), and distances in high(er) speed bands (>14 km/h) being more prominent in possession games. Players are technically more engaged in possession format SSG. Significantly more total (+38.7%) and individual (+60.4%) ball touches, number of passes (+99.0%), and passes per player (+55.8%) were observed in possession compared to scoring games. The scarce scientific evidence regarding the effect of possession games on tactical variables suggests that more players are involved for a longer period of time exploring greater space during these types of games. Coaches should apply possession games to increase physiological, physical, and technical engagement of players during SSG.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Countermovement Jump Kinetik unterscheiden junge Gewichtheber, die die nationale Qualifikation erreichen</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4093899</link>
      <guid>https://sponet.de/sponet/Record/4093899</guid>
      <author>Morris, S. J.</author>
      <author>Oliver, J. L.</author>
      <author>Pedley, J. S.</author>
      <author>Kember, L. S.</author>
      <author>Haff, G. G.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Gewichtheben</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>isometrisch</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Bodenreaktionskraft</dc:subject>
      <dc:tag>Countermovement-Sprung</dc:tag>
      <dc:tag>Kinetik</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Morris, S. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Kember, L. S.</dc:creator>
      <dc:creator>Haff, G. G.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Researchers have explored the relationship between force-generating abilities and weightlifting performance in young athletes, but it remains unclear whether isometric midthigh pull (IMTP) and countermovement jump (CMJ) kinetics can distinguish between those who achieve national qualification and those who do not. This study aimed to (a) compare IMTP and CMJ kinetics between young weightlifters who did and did not attain national qualification and (b) identify kinetic variables that predict qualification. Thirty-seven young weightlifters were classified into 2 groups: those who qualified (QUAL; age = 17.1 ± 0.3 years, maturity offset = 3.13 ± 0.6 years, males = 15, females = 10) and those who did not qualify (DNQ; age = 15.8 ± 2.2 years, maturity offset = 2.7 ± 1.6 years, males = 6, females = 6). Subjects completed CMJ and IMTP tests on dual force plates. T-tests revealed that QUAL showed significantly (p < 0.05) higher relative force at minimum displacement (g = 0.82), average relative propulsive force (g = 1.76), and average propulsive velocity during the CMJ (g = 0.68), along with a shorter propulsive phase (g = -1.22). In the IMTP, QUAL demonstrated higher relative peak force. Statistical parametric mapping revealed greater relative vertical force at 69-88% of movement time in QUAL, indicating higher force during the CMJ propulsive phase. Binary logistic regression identified CMJ average relative propulsive force and propulsive phase duration as significant predictors of qualification, with strong predictive accuracy (area under the receiver operator curve [AUC] = 0.910, p < 0.05 and AUC = 0.807, p < 0.05), highlighting the value of these variables when identifying and developing young weightlifters for national qualification.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>"Mein Kind macht einen Wachstumsschub durch - was soll ich tun?" Ein interdisziplinärer Ansatz für die sportliche Entwicklung während des Wachstumsschubs bei Heranwachsenden</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4093328</link>
      <guid>https://sponet.de/sponet/Record/4093328</guid>
      <author>Johnson, D.</author>
      <author>Eisenmann, J.</author>
      <author>Lawson, R.</author>
      <author>Stables, R.</author>
      <author>Williams, S.</author>
      <author>Cumming, S.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Pubertät</dc:subject>
      <dc:subject>Körperbau</dc:subject>
      <dc:subject>Körperentwicklung</dc:subject>
      <dc:tag>Wachstum</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Johnson, D.</dc:creator>
      <dc:creator>Eisenmann, J.</dc:creator>
      <dc:creator>Lawson, R.</dc:creator>
      <dc:creator>Stables, R.</dc:creator>
      <dc:creator>Williams, S.</dc:creator>
      <dc:creator>Cumming, S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Puberty is a critical period for young athletes, characterized by significant physical, psychological, and social changes. During puberty, young athletes experience the adolescent growth spurt at the same time as intensified training regimens, which can affect performance, injury risk, and overall health. Systematic training can improve physiological and performance outcomes, but the increased training volume and changes to the body during adolescence can also heighten the risk of injuries. This article discusses the injury risks associated with adolescent growth and provides comprehensive recommendations to mitigate these risks. Key recommendations include limiting training hours to the athlete's age, monitoring growth and maturation to adjust training loads and content, and incorporating and modifying consistent strength and conditioning prescriptions. In addition, optimal nutrition, sleep, and interdisciplinary planning among coaches, parents, and stakeholders should be emphasized to support young athletes' holistic development and well-being during the adolescent growth spurt.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Vertikale Kinetik des Fallrückziehers identifiziert männliche Jugendfußballspieler mit höherem Risiko für Knieverletzungen ohne Kontakt</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4093322</link>
      <guid>https://sponet.de/sponet/Record/4093322</guid>
      <author>Pedley, J. S.</author>
      <author>Lloyd, R. S.</author>
      <author>Read, P. J.</author>
      <author>Moore, I. S.</author>
      <author>Myer, G. D.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Risikofaktor</dc:subject>
      <dc:tag>Kinetik</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Moore, I. S.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[Objectives: To determine associations between drop-jump vertical kinetics and acute non-contact knee injury-risk in male youth soccer players.
Design: Prospective cohort study.
Setting: Professional soccer academies.
Participants: Youth soccer players (n = 264).
Main outcome measures: Drop-jump vertical kinetics; injury epidemiology. Associations between kinetics and injury were assessed using binary logistic regression. Differences between injured and uninjured groups were compared using statistical parametric mapping.
Results: Peak braking: peak propulsive force ratio (OR = 1.59, 1.10-2.29, p < 0.05), propulsive work (OR = 0.53, 0.28-0.99, p < 0.05) and vertical stiffness (OR = 1.68, 1.13-2.52, p < 0.05) were associated with risk of sustaining a knee injury. All variables demonstrated `unusable` or `weak` levels of predictive ability in identifying players who would become injured (AUC 0.568-0.663).
Conclusions: Drop-jump vertical kinetics that characterise the shape of the force-time waveform provide insight to acute non-contact knee injury-risk in male youth soccer players. Large transient spikes in force in the early phase of ground contact, coupled with reduced propulsive forces are a risk factor for acute non-contact knee injury in male youth soccer players. Variables are not sensitive enough to predict injury but provide additional training targets to help mitigate risk in this population.

Highlights

In this prospective study, male youth soccer players performed a baseline drop jump assessment.

The prevalence of acute non-contact knee injury was 7% during the one playing season follow-up.

Drop jump ground reaction force variables were unable to predict acute non-contact knee injury.

Large impact force with reduced propulsive force is a risk factor for non-contact knee injury in male youth soccer players.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Einschätzung und Beobachtung von Verletzungsrisikofaktoren bei jungen Turnerinnen und Turnern</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4093222</link>
      <guid>https://sponet.de/sponet/Record/4093222</guid>
      <author>Williams, E. R.</author>
      <author>Lloyd, R. S.</author>
      <author>Moeskops, S.</author>
      <author>Pedley, J. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Gerätturnen</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Geschlecht</dc:subject>
      <dc:subject>Risikofaktor</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Prävention</dc:subject>
      <dc:subject>koordinative Fähigkeit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Gleichgewicht</dc:subject>
      <dc:tag>Wachstum</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Williams, E. R.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <content:encoded><![CDATA[Talented young gymnasts often specialize at a very young age and can engage in very high volumes of high-intensity training. However, sampling gymnastics is beneficial for the development of young athletes in all sports as it develops coordination, strength, and balance. The repetitive nature of gymnastics practice, coupled with high training loads, can interact with natural processes of growth and maturation and potentially elevate the probability of injury if consideration is not given to monitoring risk factors and modifying training accordingly. Therefore, a systematic approach to identifying injury risk factors in youth gymnasts is required. In the absence of direct evidence in young gymnasts, a testing battery based on best available evidence from youth sports is recommended to assist gymnastics coaches to monitor fluctuations in risk as their gymnasts grow and mature.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Einfluss neuromuskulärer Trainingsmaßnahmen auf die Biomechanik bei Sprunglandungen und Auswirkungen auf VKB-Verletzungen bei weiblichen Jugendlichen: eine systematische Übersicht und Meta-Analyse</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4093094</link>
      <guid>https://sponet.de/sponet/Record/4093094</guid>
      <author>Ramachandran, A. K.</author>
      <author>Pedley, J. S.</author>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Myer, G. D.</author>
      <author>Hsiao, H.-I.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>neuromuskulär</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Junioren</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:subject>Kreuzband</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Landung</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Ramachandran, A. K.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Hsiao, H.-I.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Background: Various exercise interventions are recommended to reduce the risk of anterior cruciate ligament (ACL) injury in females. However, the extent to which these training interventions influence lower-limb landing biomechanics in youth female remains unclear.
Objective: This systematic review and meta-analysis aimed to quantitatively summarise the effectiveness of various training interventions on jump-landing biomechanics in youth females.
Methods: We systematically searched PubMed, SPORTDiscus, EMBASE and Scopus. Articles were included if they: (1) conducted research on uninjured youth females (reported mean age < 18 years) with no restriction on playing level/experience or physical activity level; (2) performed any form of training intervention for = 4 weeks; (3) reported any lower-limb kinematic (flexion/extension, adduction/abduction or internal/external rotation angles) or kinetic (joint moments or vertical ground reaction forces) data during the landing phase of jump-landing tasks, pre- and post-training intervention for both experimental and control groups, using a two- or three-dimensional motion capture system; (4) were randomised- or non-randomised controlled trials. The quality of the randomised controlled trials was assessed using the Risk of Bias tool 2, whereas the Downs and Black checklist was used for assessing the quality of non-randomised controlled trials. A multi-level meta-analytical model was used for conducting the quantitative analysis.
Results: Thirteen studies (7 randomised controlled, 6 non-randomised controlled studies) involving 648 female participants were included in the final analyses. With regards to the overall quality of the included studies, three studies had high risk of bias while ten studies had some concerns. As part of the meta-analysis, we were able to analyse seven kinematic variables and two kinetic variables in aggregate. Compared with controls, the experimental group had significantly increased peak knee flexion angle (g = 0.58, p = 0.05) and reduced knee valgus motion (g =  - 0.86, p = 0.05) post-intervention. The effects on other kinematic and kinetic variables ranged from trivial to moderate and were not significantly altered as a result of various training interventions.
Conclusion: The findings from the synthesised literature indicate that training interventions have small to moderate effects on peak knee flexion angle and knee valgus motion during jumping tasks. However, further research employing more consistent study designs and methodologies is required to better understand the changes in jump-landing biomechanics in the youth female population following training interventions.

Key Points:

1. Training interventions can increase peak knee flexion angle and reduce knee valgus motion during jump-landing tasks in youth females.

2. Since movements around hip and ankle can influence knee biomechanics during jump-landing tasks, it is recommended that future research should consider the influence of training interventions on these two joints as well.

3. There is a need for higher-quality research to better understand the influence of training interventions on lower-limb biomechanics during jump landing tasks in youth females.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Eine kinetisch verbesserte Bewertung des Tuck-Sprungs zeigt verbleibende biomechanische Defizite bei weiblichen Athleten 9 Monate nach der Rekonstruktion des vorderen Kreuzbandes auf</title>
      <pubDate>Mon, 01 Jan 2024 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4091637</link>
      <guid>https://sponet.de/sponet/Record/4091637</guid>
      <author>Kember, L. S.</author>
      <author>Riehm, C. D.</author>
      <author>Schille, A.</author>
      <author>Slaton, J. A.</author>
      <author>Myer, G. D.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Rehabilitation</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Programm</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Kreuzband</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Kember, L. S.</dc:creator>
      <dc:creator>Riehm, C. D.</dc:creator>
      <dc:creator>Schille, A.</dc:creator>
      <dc:creator>Slaton, J. A.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Addressing biomechanical deficits in female athletes after anterior cruciate ligament reconstruction (ACLR) is crucial for safe return-to-play. The tuck jump assessment (TJA) is used to identify risks associated with ACL injury, yet its fundamental analyses lack the ability to explore landing forces. Kinetic asymmetries during the TJA were assessed in athletes with ACLR (n = 38) and matched healthy controls (n = 21) using discrete time-point analysis and statistical parametric mapping (p < 0.05). The ACLR group performed fewer jumping cycles with distinct kinetic differences, including longer ground contact time (g = 1.45), larger peak center of mass displacement (g = 1.29), and lower peak vertical ground reaction force (VGRF) (g = -2.05) and relative leg stiffness (g = -1.51). Greater interlimb kinetic asymmetries were evident in the ACLR group for VGRF (g = 0.84), relative leg stiffness (g = 0.85), average loading rate (g = 0.84), peak braking force (g = 0.85), and time of braking (g = 0.80) and propulsive peaks (g = 1.04). Moderate differences in VGRF favored the uninvolved limb of the ACLR group for the majority (2-100%) of the stance phase of TJA (d = -0.52). Distinct jump-landing strategies between ACLR athletes and healthy controls were revealed during the TJA, which may indicate compromised stretch-shortening cycle function. Findings highlight the need for targeted rehabilitation to foster greater kinetic symmetry in jump-landing performance and underscore the importance of longitudinal and progressive monitoring for optimized return-to-play outcomes in athletes after ACLR.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Einbettung von Wachstums- und Reifeanalysen in den Talententwicklungspfad von jugendlichen Gewichtheberinnen und Gewichthebern</title>
      <pubDate>Wed, 01 Jan 2025 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4091183</link>
      <guid>https://sponet.de/sponet/Record/4091183</guid>
      <author>Morris, S. J.</author>
      <author>Oliver, J. L.</author>
      <author>Pedley, J. S.</author>
      <author>Radnor, J. M.</author>
      <author>Hill, M.</author>
      <author>Haff, G. G.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Gewichtheben</dc:subject>
      <dc:subject>Sportler</dc:subject>
      <dc:subject>Entwicklung</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Talent</dc:subject>
      <dc:tag>Talentidentifikation</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Morris, S. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Radnor, J. M.</dc:creator>
      <dc:creator>Hill, M.</dc:creator>
      <dc:creator>Haff, G. G.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Growth and maturation have a significant influence on naturally occurring changes in performance, training-induced adaptations, injury risk, and psychosocial development and should, therefore, be important considerations within talent identification and development pathways for young weightlifters. Key stakeholders in youth weightlifting require an understanding of growth and maturation to support the long-term development of athletes and ensure that future potential is considered rather than making judgments based on enhanced physical qualities synonymous with advanced stages of maturation. This article considers methods of assessing biological maturation and growth rates and then explores how weightlifting performance can be influenced by growth and maturation. The article is accompanied by an Excel template to estimate maturity status and timing. Finally, recommendations are offered to help practitioners embed growth and maturation analysis within youth weightlifting pathways to enhance performance, reduce injury risk, and create optimal training and competition environments.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Veränderungen der Biomechanik der unteren Gliedmaßen in verschiedenen Reifestadien und Auswirkungen auf das Verletzungsrisiko des Kreuzbandes bei Sportlerinnen: eine systematische Übersicht</title>
      <pubDate>Mon, 01 Jan 2024 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4089081</link>
      <guid>https://sponet.de/sponet/Record/4089081</guid>
      <author>Ramachandran, A. K.</author>
      <author>Pedley, J. S.</author>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Myer, G. D.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Literaturanalyse</dc:format>
      <dc:format>Artikel</dc:format>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:subject>Kreuzband</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Risikofaktor</dc:subject>
      <dc:subject>Analyse</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Junioren</dc:subject>
      <dc:subject>Pubertät</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Winkel</dc:subject>
      <dc:format>Literaturanalyse</dc:format>
      <dc:format>Artikel</dc:format>
      <dc:creator>Ramachandran, A. K.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Key Points

There was strong evidence for post-pubertal female athletes to have higher peak knee abduction angle compared with pre-pubertal athletes.

There was strong evidence for post-pubertal athletes to have higher peak external knee abduction moment and internal rotation moment compared with pre-pubertal athletes.

There was strong evidence for pre-pubertal athletes to have higher relative vertical ground reaction force compared with post-pubertal athletes.

It is recommended that future research should explore the changes in jump-landing biomechanics across hip and ankle joints in addition to the knee joint across various maturity levels in female athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Die Auswirkungen von Kraft-, plyometrischem und kombiniertem Training auf Kraft-, Leistungs- und Schnelligkeitseigenschaften bei hochtrainierten männlichen Jugendfußballspielern: eine systematische Übersicht und Metaanalyse</title>
      <pubDate>Mon, 01 Jan 2024 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4088019</link>
      <guid>https://sponet.de/sponet/Record/4088019</guid>
      <author>Oliver, J. L.</author>
      <author>Ramachandran, A. K.</author>
      <author>Singh, U.</author>
      <author>Ramirez-Campillo, R.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Junioren</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Schnelligkeit</dc:subject>
      <dc:subject>plyometrisches Training</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Beschleunigung</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Ramachandran, A. K.</dc:creator>
      <dc:creator>Singh, U.</dc:creator>
      <dc:creator>Ramirez-Campillo, R.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Key Points:

1. Despite engaging in high volumes of systematic soccer training from a young age, high-level, highly trained male youth soccer players can still make positive improvements in strength, power and speed characteristics following strength, plyometric and combined training interventions.

2. Strength gains in high-level, highly trained male youth soccer players are greater following strength or combined training when compared with plyometric training.

3. It is likely that future strength, plyometric or combined training in high-level, highly trained male youth soccer players will lead to positive improvements in squat and countermovement jump performance, horizontal power and acceleration.

4. While all forms of training led to mostly moderate improvements in strength, jump performance, acceleration and change of direction speed, maximal speed only improved by a small amount.

Abstract: 

Background: Male youth soccer players competing at a high level will typically engage in large volumes of soccer training from a young age. However, it is not known whether the high levels of habitual training that these high-performing players are exposed to limit their ability to respond to strength, plyometric or combined training interventions.
Objective: The primary aim of our systematic review and meta-analysis was to compare the specific effects of strength, plyometric and combined training with active controls (standard soccer training) on the strength, power and speed characteristics of high-level, highly trained young male soccer players.
Methods: We performed a literature search across PubMed, Scopus, CINAHL, Web of Science and SPORTDiscus to identify controlled studies that implemented strength, plyometric or combined training in high-level male youth soccer players. Participants were defined as high level or highly trained based on established guidelines related to either competition level or age-related weekly hours spent in soccer training. Studies needed to report at least one outcome of lower body strength, squat jump, countermovement jump, horizontal power, acceleration (0-10 m), speed (15-40 m) or change of direction speed. A meta-analysis was then performed using a random-effects model to determine the magnitude (Hedge`s g) of training responses and whether effects differed across modes of training.
Results: From an initial return of 5464 papers, n = 34 studies met the inclusion criteria and provided a total sample of n = 1396 high-level male youth soccer players. Strength, plyometric and combined training resulted in improvements in strength, squat and countermovement jump, horizontal power, acceleration, change of direction speed (all p < 0.05; g = 0.73-1.08, moderate) and speed (p < 0.05; g = 0.40-0.59, small). Lower body strength was the only outcome where training mode had a significant effect (p < 0.05), with plyometric training producing small effects (g = 0.27, p < 0.05) compared with moderate effects for strength (g = 1.07, p < 0.05) and combined (g = 0.75, p < 0.05) training. Prediction intervals for overall effects (all training modes combined) showed that the greatest confidence that future training will lead to positive effects was in the squat and countermovement jump, horizontal power and acceleration (prediction intervals = 0.03-1.81).
Conclusions: High-level, highly trained male youth soccer players can experience positive gains in indices of strength, power and speed from strength, plyometric and combined training, and the magnitude of gains are mostly similar across modes of training. Based on prediction intervals, there is a good level of certainty that future strength, plyometric and combined training in this population would lead to positive improvements in vertical and horizontal power and sprint acceleration.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Zwölf Wochen progressives Krafttraining verbessern die körperliche Fitness und die Golfschwungleistung bei talentierten jungen Golfern positiv</title>
      <pubDate>Mon, 01 Jan 2024 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4087202</link>
      <guid>https://sponet.de/sponet/Record/4087202</guid>
      <author>Shaw, J.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Golf</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>Trainingswirkung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Shaw, J.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[This aim of this study was to investigate the effects of a 12-week resistance training program in talented junior golfers. Eighteen talented youth golfers were pair matched by maturity status and handicap, and subsequently allocated to an experimental (EXP) or control group. During the 12-week intervention, both groups continued with their normal golf practice while the EXP group also completed a progressive twice-weekly resistance training program. At baseline, subjects performed multiple trials of an isometric midthigh pull (IMTP), countermovement jump (CMJ), standing long jump, golf movement screen (GMS), and isometric plank hold. Club head speed (CHS) and carry distance for a 6-iron and driver were also measured using a commercial launch monitor. When controlled for maturity offset, there were significant (p < 0.05) interaction effects in favor of the EXP group for absolute (g = 1.29) and relative (g = 2.06) peak force for the IMTP, CMJ absolute (g = 0.73) and relative (g = 0.66) peak power, jump height (g = 1.05), modified reactive strength index (g = 1.30), lateral (g = 0.48-0.88) and horizontal jump distance (g = 1.20), and GMS total score (g = 1.07). Significant interaction effects were also reported in 6-iron and driver CHS and carry distance in favor of the EXP group (p < 0.05; g = 0.41-1.64). These findings indicate that twice-weekly resistance training in combination with regular golf practice can stimulate increases in measures of strength, power, and movement competency in youth golfers, which should contribute to enhanced golf swing performance.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Physikalische Determinanten der Golfschwungleistung bei jugendlichen Wettkampfgolfern</title>
      <pubDate>Sun, 01 Jan 2023 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4086951</link>
      <guid>https://sponet.de/sponet/Record/4086951</guid>
      <author>Shaw, J.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Golf</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Technik</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Leistungsfähigkeit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Bewegungsgenauigkeit</dc:subject>
      <dc:subject>Bewegungsgrundform</dc:subject>
      <dc:subject>Talent</dc:subject>
      <dc:subject>Adoleszenz</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsmethode</dc:subject>
      <dc:subject>Entwicklung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Shaw, J.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[This study investigated measures of physical fitness and golf swing performance in competitive youth golfers. Sixty-four golfers, subdivided into three handicap groups (CAT0, <1 handicap, n = 21; CAT1, 1-5 handicap, n = 20; CAT2, >5 handicap, n = 23), were assessed for isometric strength, power, movement competency and core endurance. Clubhead speed (CHS) and carry distance for 6-iron and driver were also measured. When controlled for maturity offset, CAT0 golfers produced significantly greater peak power, isometric absolute and relative peak force, movement competency, and jump distance than higher handicap golfers (all p < 0.05). Maturity status was strongly associated with CHS and carry distance for both clubs (R2 = 0.552-0.784). Linear regressions showed maturity offset explained a larger amount of variance in CHS (driver = 78.4%, 6-iron = 71.3%) and carry distance (driver = 55.2%, 6-iron = 57.4%) than handicap. Multiple linear regression analyses showed that peak power explained 79.4% and 82.4% of variation in 6-iron and driver CHS, respectively, while isometric absolute peak force explained 69.6% and 74.3% of the variation in 6-iron and driver carry distance, respectively. Subsequently, interventions targeting the development of peak force and power could aid golf swing performance in young golfers.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Wahrnehmungen und Ansätze von Golftrainern in Bezug auf Kraft- und Konditionierungsmaßnahmen für jugendliche Golfer</title>
      <pubDate>Sun, 01 Jan 2023 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4085249</link>
      <guid>https://sponet.de/sponet/Record/4085249</guid>
      <author>Shaw, J.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Golf</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Entwicklung</dc:subject>
      <dc:subject>Widerstand</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Beweglichkeit</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>Wahrnehmung</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Shaw, J.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Golfers who want to improve their technical proficiency will undoubtedly hire a swing coach who may also influence and give advice on how the golfer can improve outside of technical enhancement (i.e. strength and conditioning, warm-ups, cool-downs etc.). With research examining the effects of strength and conditioning on youth golfers beginning to materialise, it is important to ascertain golf coaches` perceptions of strength and conditioning, warm-ups and cool-downs and how they are utilised with youth golfers. Fifty Professional Golfers` Association Professionals and Assistant Professionals completed an online questionnaire on their perceptions of, and approaches to, strength and conditioning, warm-up and cool-down activities for youth golfers. Data indicated that 84% and 80% of coaches perceived strength and conditioning could enhance golf swing performance and reduce the risk of injury, respectively. Although all coaches agreed golfers aged 18 years and under can take part in strength and conditioning activities, there was no consensus on when a golfer should start strength and conditioning activities, with most coaches unaware of the existing guidelines surrounding youth resistance training. Warm-ups are perceived by coaches to be beneficial for youth golfers with > 75% of coaches stating their players completed a warm-up, however, the modes of exercise coaches deemed suitable for a warm-up were varied. Cool-downs were deemed beneficial for aiding recovery post-round, yet over half of coaches selected their players did not habitually complete one. Findings from the questionnaire highlight that although perceptions towards strength and conditioning, warm-ups and cool-downs are positive, educational solutions to disseminate the underlying contemporary guidelines and practical applications to coaches and players are required.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Tests zur wiederholten Sprintfähigkeit bei linearen Sprints und Sprints mit Richtungswechseln: eine systematische Übersicht</title>
      <pubDate>Sun, 01 Jan 2023 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4084227</link>
      <guid>https://sponet.de/sponet/Record/4084227</guid>
      <author>Kyles, A.</author>
      <author>Oliver, J. L.</author>
      <author>Cahill, M. J.</author>
      <author>Lloyd, R. S.</author>
      <author>Pedley, J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Spielsportart</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Richtungswechsel</dc:subject>
      <dc:subject>Ermüdung</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>Leistungsdiagnostik</dc:subject>
      <dc:subject>Standardisierung</dc:subject>
      <dc:subject>Sprintwiederholungsfähigkeit</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Kyles, A.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Cahill, M. J.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Pedley, J.</dc:creator>
      <content:encoded><![CDATA[The ability to repeatedly sprint is important in many sports, but there is no established protocol for measuring repeated sprint ability (RSA). The purpose of this review was to identify overground RSA protocols previously reported in the literature and to recommend standardized protocols. A systematic review of the literature was used to identify studies that have used an RSA test, with data describing protocol design extracted. One hundred eight studies were included in the review, across which 47 unique protocols were identified. Eighteen protocols included at least one change of direction (COD), and this increased mean sprint time compared with linear RSA tests (7.26 ± 1.84 vs. 4.48 ± 1.02 seconds). There was considerable variability across protocols regarding sprint distance (20-40 m), sprint repetitions (3-15), recovery duration (10-60 seconds), recovery type (active vs. passive), and work-to-rest ratio (=1:1.4-19.2). Separate protocols are needed for linear and COD tests, and these should reflect the brief nature of intense periods of competition and stress the ability to recover. Based on data across studies for protocol design and to ensure a demanding work-to-rest ratio, it is suggested that a linear RSA should comprise 6 × 30 m sprints separated by 15 seconds of active recovery. To provide some parity to linear tests, to keep work duration brief and to maintain a demanding work-to-rest ratio, a COD RSA should comprise 6 × 30 m shuttle sprints (15 + 15 m), providing one change of direction (180° COD), and maintaining a 15-second active recovery.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Physikalische Determinanten der Golfschwungleistung: Überlegungen für jugendliche Golfer</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4082328</link>
      <guid>https://sponet.de/sponet/Record/4082328</guid>
      <author>Shaw, J.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Golf</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Junioren</dc:subject>
      <dc:subject>Parameter</dc:subject>
      <dc:subject>Talent</dc:subject>
      <dc:subject>Körper</dc:subject>
      <dc:subject>Voraussetzung</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:tag>Golfschwung</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Shaw, J.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R</dc:creator>
      <content:encoded><![CDATA[In the sport of golf, club head speed has been associated with higher skill levels in golfers and lower overall scoring. Research has shown that club head speed is an important measure of golf swing performance that can be enhanced with appropriate strength and conditioning interventions. Understanding the determinants of club head speed can help inform the design of testing batteries for talent identification and talent development of youth golfers. This review aims to highlight the current literature surrounding the biomechanical and physical determinants of golf swing performance and to examine the available tests that can be used to test these determinants in youth golfers.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Auswahl in Jugendkricket-Akademien: Der Einfluss des relativen Alters und des biologischen Entwicklungsgrads</title>
      <pubDate>Sun, 01 Jan 2023 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4082245</link>
      <guid>https://sponet.de/sponet/Record/4082245</guid>
      <author>Radnor, J. M.</author>
      <author>Oliver, J. L.</author>
      <author>Dobbs, I.</author>
      <author>Wong, M.</author>
      <author>Brown, T. W.</author>
      <author>Lloyd, R. S.</author>
      <author>Kelly, A. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Cricket</dc:subject>
      <dc:subject>Spielsportart</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>Talent</dc:subject>
      <dc:subject>Auswahl</dc:subject>
      <dc:subject>Alter</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>biologisches Alter</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>maximal</dc:subject>
      <dc:subject>Relativer Alterseffekt</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Radnor, J. M.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Dobbs, I.</dc:creator>
      <dc:creator>Wong, M.</dc:creator>
      <dc:creator>Brown, T. W.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Kelly, A. L.</dc:creator>
      <content:encoded><![CDATA[The aim of the study was to examine the birth quartile and maturity status distributions of male academy cricketers. Participants included 213 junior cricket players, aged between 9 and 18 years. Players were separated into birth quartiles and also grouped as early, average or late maturers. For the whole cohort, there was a medium effect bias towards players born in BQ1, but the number of early, average and late maturers was as expected. However, there were significantly more early maturers in the U10 and U11 groups than expected, and maturity distributions of the BQ groups showed that there was a small effect size bias towards early maturers in BQ4. Selection biases towards cricketers who are born earlier in the competitive year are consistent from U9 to U16, but more prevalent in the U12 and U14 age groups. There is a bias towards early maturers at U10 and U11, but this reduces as age increases. Practitioners working in academy pathways should be encouraged to assess the maturity status of players to assist in the retention and progression of players. Relative age effects should also be considered, and strategies may be required to identify players born later in the year.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Motorische Kompetenz von Jugendlichen in verschiedenen Reifestadien: Wahrnehmungen von Sportlehrern und Kraft- und Konditionstrainern</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4081192</link>
      <guid>https://sponet.de/sponet/Record/4081192</guid>
      <author>Burton, A. M.</author>
      <author>Eisenmann, J. C.</author>
      <author>Cowborn, I.</author>
      <author>Lloyd, R. S.</author>
      <author>Till, K.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>Kinder- und Jugendsport</dc:subject>
      <dc:subject>Schulsport</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>motorisches Lernen</dc:subject>
      <dc:subject>motorische Lernfähigkeit</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Burton, A. M.</dc:creator>
      <dc:creator>Eisenmann, J. C.</dc:creator>
      <dc:creator>Cowborn, I.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Till, K.</dc:creator>
      <content:encoded><![CDATA[Physical education (PE) teachers and strength and conditioning (S&C) coaches are well placed to develop motor competence within youth populations. However, both groups` perceptions of important motor competencies are relatively unknown, especially when considering stage of maturity. Therefore, this study aimed to 1) present PE teachers and S&C coaches` perceptions of motor competence importance according to stage of maturity; 2) compare perceptions of motor competence between stages of maturity, and between PE teachers and S&C coaches; and 3) explore factors that influence PE teachers and S&C coaches` perceptions of motor competence importance. Via a mixed-method questionnaire, 47 PE teachers (professional experience = 10.3±6.6 years) and 48 S&C coaches (professional experience = 8.6±4.8 years) rated the importance of developing 21 motor competencies across four stages of maturity (childhood, pre-peak height velocity [PHV], circa-PHV, and post-PHV) using a Likert-scale (1 = not important, 5 = very important). Participants also provided open-ended explanations for their perceptions. Frequency analysis indicated that participants rated a broad range of competencies important, with S&C coaches rating more competencies important than PE teachers across all stages of maturity. Mixed-model analysis highlighted several differences in motor competence importance when comparing perceptions between participant groups, and between stages of maturity for PE teachers and S&C coaches. For example, S&C coaches rated strength-based motor competencies less important during childhood (d = -1.83 to -0.43), while PE teachers rated them less important during childhood (d = -2.22 to -0.42) and pre-PHV (d = -1.70 to -0.51) compared to other stages of maturity. Codebook thematic analysis showed several factors that influenced participant`s perceptions of motor competence importance (e.g., participants understanding of themselves). The findings suggest that multiple environments may be required to adequately facilitate motor competence development amongst youth. Coach education should target misunderstandings around the risks of strength-based activity during early stages of maturity and the benefits of developing strength-based motor competencies across youth populations.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Die akuten Auswirkungen einer akzentuierten exzentrischen Belastung auf die Drop-Jump-Kinetik bei jugendlichen Athleten</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4077426</link>
      <guid>https://sponet.de/sponet/Record/4077426</guid>
      <author>Lloyd, R. S.</author>
      <author>Howard, S. W.</author>
      <author>Pedley, J. S.</author>
      <author>Read, P. J.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Rugby</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Kontraktion</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Impuls</dc:subject>
      <dc:tag>exzentrisch</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Howard, S. W.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[The purpose of the study was to determine the acute effects of accentuated eccentric loading (AEL) on drop jump kinetics in adolescent athletes. Fifteen male rugby players (mean ± SD: age = 16.2 ± 1.01, body mass = 73.38 ± 9.94, and height = 178.91 ± 6.74) completed 3 trials of a drop jump with and without an accentuated eccentric load using a dumbbell release technique that equated to 15% body mass. The addition of the AEL stimulus resulted in significant, moderate increases in jump height (p < 0.05; Wilcoxon r = 0.47) and braking and propulsive impulse (p < 0.05, Hedges' g = 0.43; p < 0.05, g = 0.61, respectively) but did not significantly influence reactive strength index. Concurrently, there were significant, moderate increases in ground contact times (p < 0.05; r = 0.45) and reductions in spring-like correlations (p < 0.05; g = 0.94). Neither the magnitude nor timing of peak landing force were significantly altered in the AEL protocol (p < 0.05, g = 0.38; p < 0.05, r = 0.10, respectively). Cumulatively, these data indicate that implementation of AEL resulted in meaningful improvements in jump height, driven by significant increases in braking and propulsive impulse. Despite extensions in ground contact times and reductions in spring-like behavior, neither peak landing force nor time to peak force were negatively altered by the AEL. These results indicate that adolescent athletes can realize superior vertical jump heights during drop jumps using AEL, without displaying marked changes in the magnitude or timing of peak landing force.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Eine neuartige Methode zur Kategorisierung der Leistung des Dehnungs-Verkürzungs-Zyklus bei Jugendfußballspielern reifegradübergreifend</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4077389</link>
      <guid>https://sponet.de/sponet/Record/4077389</guid>
      <author>Pedley, J. S.</author>
      <author>Lloyd, R. S.</author>
      <author>Read, P. J.</author>
      <author>Moore, I. S.</author>
      <author>Myer, G. D.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Alter</dc:subject>
      <dc:subject>Entwicklungsstand</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Dehnung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:tag>Dehnungs-Verkürzungs-Zyklus</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Moore, I. S.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[This study used a novel method to categorize stretch-shortening cycle (SSC) function during a drop jump (DJ) using the force-time curve. This method was then used to determine the effect of maturity status upon SSC function and effect of SSC function on DJ performance. Prepeak, circa-peak, and postpeak height velocity male youth soccer players completed a preseason 30-cm DJ onto a force plate. Stretch-shortening cycle function was categorized as poor (impact peak and not spring-like), moderate (impact peak and spring-like), or good (no impact peak and spring-like). Interactions between SSC function and maturity status, and SSC function and kinetic variables were explored. Youth soccer players displaying good SSC function were older and more mature than those with poor SSC function; however, 9.9% of post peak height velocity still displayed poor SSC function. Players with good SSC function recorded significantly shorter ground contact times, reduced time between peak landing and takeoff force, reduced center of mass displacement, and significantly greater takeoff forces than players with moderate and poor SSC function (all p < 0.05). SSC function during a standardized DJ improves with maturation, but a portion of mature players still demonstrate poor SSC function. Good SSC function was associated with improved DJ outcome measures except jump height. Tailored training interventions based on SSC competency may be required to optimally enhance SSC function.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Vergleich von Gewichtheben, traditionellem Widerstandstraining und Plyometrics auf Kraft, Leistung und Schnelligkeit: eine systematische Überprüfung mit Metaanalyse</title>
      <description><![CDATA[https://cover.sponet.de/SPONET5-00005474.JPG]]></description>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4076726</link>
      <guid>https://sponet.de/sponet/Record/4076726</guid>
      <author>Morris, S. J.</author>
      <author>Oliver, J. L.</author>
      <author>Pedley, J. S.</author>
      <author>Haff, G. G.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingswissenschaft</dc:subject>
      <dc:subject>Gewichtheben</dc:subject>
      <dc:subject>plyometrisches Training</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Schnelligkeit</dc:subject>
      <dc:subject>Widerstand</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Morris, S. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Haff, G. G.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Background: Weightlifting training (WLT) is commonly used to improve strength, power and speed in athletes. However, to date, WLT studies have either not compared training effects against those of other training methods, or been limited by small sample sizes, which are issues that can be resolved by pooling studies in a meta-analysis. Therefore, the objective of this systematic review with meta-analysis was to evaluate the effects of WLT compared with traditional resistance training (TRT), plyometric training (PLYO) and/or control (CON) on strength, power and speed.
Methods: The systematic review included peer-reviewed articles that employed a WLT intervention, a comparison group (i.e. TRT, PLYO, CON), and a measure of strength, power and/or speed. Means and standard deviations of outcomes were converted to Hedges` g effect sizes using an inverse variance random-effects model to generate a weighted mean effect size (ES).
Results: Sixteen studies were included in the analysis, comprising 427 participants. Data indicated that when compared with TRT, WLT resulted in greater improvements in weightlifting load lifted (4 studies, p = 0.02, g = 1.35; 95% CI 0.20-2.51) and countermovement jump (CMJ) height (9 studies, p = 0.00, g = 0.95; 95% CI 0.04-1.87). There was also a large effect in terms of linear sprint speed (4 studies, p = 0.13, g = 1.04; 95% CI - 0.03 to 2.39) and change of direction speed (CODS) (2 studies, p = 0.36, g = 1.21; 95% CI - 1.41 to 3.83); however, this was not significant. Interpretation of these findings should acknowledge the high heterogeneity across the included studies and potential risk of bias. WLT and PLYO resulted in similar improvements in speed, power and strength as demonstrated by negligible to moderate, non-significant effects in favour of WLT for improvements in linear sprint speed (4 studies, p = 0.35, g = 0.20; 95% CI - 0.23 to 0.63), CODS (3 studies, p = 0.52, g = 0.17; 95% CI - 0.35 to 0.68), CMJ (6 studies, p = 0.09, g = 0.31; 95% CI - 0.05 to 0.67), squat jump performance (5 studies, p = 0.08, g = 0.34; 95% CI - 0.04 to 0.73) and strength (4 studies, p = 0.20, g = 0.69; 95% CI - 0.37 to 1.75).
Conclusion: Overall, these findings support the notion that if the training goal is to improve strength, power and speed, supplementary weightlifting training may be advantageous for athletic development. Whilst WLT and PLYO may result in similar improvements, WLT can elicit additional benefits above that of TRT, resulting in greater improvements in weightlifting and jumping performance.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Praktische Strategien zur Integration von Kraft und Kondition in frühe Spezialisierungssportarten</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4076300</link>
      <guid>https://sponet.de/sponet/Record/4076300</guid>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Read, P. J.</author>
      <author>Cronin, J. B.</author>
      <author>Myer, G. D.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Kind</dc:subject>
      <dc:subject>Kinder- und Jugendsport</dc:subject>
      <dc:subject>Spezialisierung</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Trainingssteuerung</dc:subject>
      <dc:subject>Trainingswissenschaft</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:tag>Burnout</dc:tag>
      <dc:tag>frühzeitige Spezialisierung</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Cronin, J. B.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Early sport specialization involves physically immature children participating in intensive year-round training and/or competition for a single sport. The lack of sport exposure and diversification during the developmental years may underlie the increased risk of overuse injuries, blunting of motor skill development, psychosocial issues, overtraining syndrome, burnout, and potential dropout from sport. With increasing number of youth choosing, or being encouraged, to specialize at an early age, we aim to provide evidence-based recommendations for the integration of strength and conditioning into the development programs of young athletes who participate in sports with a culture of early specialization. In addition to the principles of programming, strategies are provided relative to monitoring of growth, maturation, and training load to illustrate the potential complexities of attempting to optimize long-term athletic development in early specializing athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Auswirkungen eines 10-monatigen neuromuskulären Trainingsprogramms auf Kraft, Leistung, Schnelligkeit und Sprungleistung bei jungen Turnerinnen</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4075922</link>
      <guid>https://sponet.de/sponet/Record/4075922</guid>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Read, P. J.</author>
      <author>Haff, G.</author>
      <author>Myer, G. D.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Gerätturnen</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Schnelligkeit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>neuromuskulär</dc:subject>
      <dc:subject>isometrisch</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Haff, G.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Purpose 
This study aimed to evaluate a 10-month neuromuscular training (NMT) intervention on isometric and dynamic kinetics, standing long jump (SLJ) distance, speed, and sport-specific performance.

Methods 
Forty-three prepubertal female gymnasts were allocated into either a gymnastics + NMT (gNMT; n = 16), gymnastics only (GYM, n = 15), or maturity-matched control (CON; n = 12) group. The gNMT followed a 10-month, twice-weekly NMT program that targeted movement competency, strength, power, and speed. Vaulting vertical take-off velocity, speed, SLJ distance, and kinetics during an isometric mid-thigh pull (IMTP), countermovement jump (CMJ), and drop jump (DJ) were measured at baseline and thereafter at 4, 7, and 10 months. Within-group differences were calculated using 3 × 4 repeated-measures ANCOVA.

Results 
Interaction effects were observed for SLJ distance and various IMTP, DJ, and vaulting variables. The gNMT showed significant improvements in IMTP absolute force and SLJ distance after 4 months and each subsequent testing session. IMTP relative force and various CMJ and DJ kinetics significantly improved in the gNMT from 7 months. Significant gains in speed and vaulting take-off velocity occurred after 10 months. The GYM group achieved some significant improvements in CMJ impulse, absolute isometric strength, and DJ spring-like behavior, whereas the CON group did not experience any changes.

Conclusions 
The addition of NMT to gymnastics training improved various isometric and dynamic kinetics, SLJ distance, speed, and vaulting take-off velocity in the gNMT, changes that were not equally evidenced for GYM or CON. The threshold for most of the training-induced adaptations observed in IMTP relative force, CMJ and DJ kinetics, sprint speed, and vaulting were achieved after 7 months, emphasizing the efficacy of long-term NMT programs for young gymnasts.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Planung von plyometrischem Sprungtraining im Fußball: ein Review</title>
      <description><![CDATA[https://cover.sponet.de/SPONET5-00005453.JPG]]></description>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4076026</link>
      <guid>https://sponet.de/sponet/Record/4076026</guid>
      <author>Ramirez-Campillo, R.</author>
      <author>Moran, J.</author>
      <author>Oliver, J. L.</author>
      <author>Pedley, J. S.</author>
      <author>Lloyd, R. S.</author>
      <author>Granacher, U.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:format>Infografik</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>plyometrisches Training</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Trainingsplanung</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Muskelphysiologie</dc:subject>
      <dc:subject>Neurophysiologie</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:format>Infografik</dc:format>
      <dc:creator>Ramirez-Campillo, R.</dc:creator>
      <dc:creator>Moran, J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Granacher, U.</dc:creator>
      <content:encoded><![CDATA[The aim of this review was to describe and summarize the scientific literature on programming parameters related to jump or plyometric training in male and female soccer players of different ages and fitness levels. A literature search was conducted in the electronic databases PubMed, Web of Science and Scopus using keywords related to the main topic of this study (e.g., "ballistic" and "plyometric"). According to the PICOS framework, the population for the review was restricted to soccer players, involved in jump or plyometric training. Among 7556 identified studies, 90 were eligible for inclusion. Only 12 studies were found for females. Most studies (n = 52) were conducted with youth male players. Moreover, only 35 studies determined the effectiveness of a given jump training programming factor. Based on the limited available research, it seems that a dose of 7 weeks (1-2 sessions per week), with ~80 jumps (specific of combined types) per session, using near-maximal or maximal intensity, with adequate recovery between repetitions (<15 s), sets (=30 s) and sessions (=24-48 h), using progressive overload and taper strategies, using appropriate surfaces (e.g., grass), and applied in a well-rested state, when combined with other training methods, would increase the outcome of effective and safe plyometric-jump training interventions aimed at improving soccer players physical fitness. In conclusion, jump training is an effective and easy-to-administer training approach for youth, adult, male and female soccer players. However, optimal programming for plyometric-jump training in soccer is yet to be determined in future research.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Entwicklung der motorischen Kompetenz bei Jugendlichen: Wahrnehmungen und Praktiken von Kraft- und Konditionstrainern</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4074018</link>
      <guid>https://sponet.de/sponet/Record/4074018</guid>
      <author>Burton, A. M.</author>
      <author>Eisenmann, J. C.</author>
      <author>Cowburn, I.</author>
      <author>Lloyd, R. S.</author>
      <author>Till, K.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>motorisches Lernen</dc:subject>
      <dc:subject>Bewegungsfertigkeit</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Burton, A. M.</dc:creator>
      <dc:creator>Eisenmann, J. C.</dc:creator>
      <dc:creator>Cowburn, I.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Till, K.</dc:creator>
      <content:encoded><![CDATA[Motor competency is integral to the long-term athletic development of youths. Strength and conditioning (S&C) coaches are recommended to deliver motor competency interventions, yet no studies have investigated their perceptions and practices for developing motor competency in youths. Sixty-seven male, and 4 female S&C coaches completed an initial and follow up questionnaire using a 5-point Likert scale, rating 1] the importance of developing competence, and 2] how frequently they developed competence across 90 motor competencies. Over 55% of S&C coaches reported a broad range of "important" (69/90) and "frequently developed" (48/90) motor competencies. The most important motor competency was "deceleration" (4.9 ± 0.3), whilst "hip hinge (bilateral)" was the most practised (4.4 ± 0.5). S&C coaches targeted upper body pushing and pulling competencies more than their perceived importance, whilst agility (e.g., turning) competencies were targeted less than their importance. Further analysis showed S&C coaches who delivered 3-4 sessions per week targeted 15-18% more competencies compared to = 2 sessions per week. Overall, these findings have strong implications for youth motor competency development including the reflection of important vs. practised competencies, coach education programmes, and consideration for how S&C coaches should seek to optimise motor competency development within youths.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Last-Geschwindigkeits-Profil bei Einsatz des Zugschlittens und Auswirkungen auf das Sprinttraining junger Athleten</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4073917</link>
      <guid>https://sponet.de/sponet/Record/4073917</guid>
      <author>Cahill, M. J.</author>
      <author>Oliver, J. L.</author>
      <author>Cronin, J. B.</author>
      <author>Clark, K. P.</author>
      <author>Cross, M. R.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Leichtathletik</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsmittel</dc:subject>
      <dc:subject>Widerstand</dc:subject>
      <dc:subject>Gütekriterien</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:tag>Reliabilität</dc:tag>
      <dc:tag>Zugschlitten</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Cahill, M. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Cronin, J. B.</dc:creator>
      <dc:creator>Clark, K. P.</dc:creator>
      <dc:creator>Cross, M. R.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Resisted sled pushing is a popular method of sprint-specific training; however, little evidence exists to support the prescription of resistive loads in young athletes. The purpose of this study was to determine the reliability and linearity of the force-velocity relationship during sled pushing, as well as the amount of between-athlete variation in the load required to cause a decrement in maximal velocity (Vdec) of 25, 50, and 75%. Ninety (n = 90) high school, male athletes (age 16.9 ± 0.9 years) were recruited for the study. All subjects performed 1 unresisted and 3 sled-push sprints with increasing resistance. Maximal velocity was measured with a radar gun during each sprint and the load-velocity (LV) relationship established for each subject. A subset of 16 subjects examined the reliability of sled pushing on 3 separate occasions. For all individual subjects, the LV relationship was highly linear (r > 0.96). The slope of the LV relationship was found to be reliable (coefficient of variation [CV] = 3.1%), with the loads that cause a decrement in velocity of 25, 50, and 75% also found to be reliable (CVs = <5%). However, there was large between-subject variation (95% confidence interval) in the load that caused a given Vdec, with loads of 23-42% body mass (%BM) causing a Vdec of 25%, 45-85 %BM causing a Vdec of 50%, and 69-131 %BM causing a Vdec of 75%. The Vdec method can be reliably used to prescribe sled-push loads in young athletes, but practitioners should be aware that the load required to cause a given Vdec is highly individualized.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Optimierung des langfristigen Leistungsaufbaus im Sport: Eine Untersuchung des Wissens, der Einhaltung, der Methoden und der Herausforderungen von Trainern</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4073561</link>
      <guid>https://sponet.de/sponet/Record/4073561</guid>
      <author>Till, K.</author>
      <author>Lloyd, R. S.</author>
      <author>McCormack, S.</author>
      <author>Williams, G.</author>
      <author>Baker, J.</author>
      <author>Eisenmann, J. C.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Kenntnisvermittlung</dc:subject>
      <dc:subject>Sportler</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Schule</dc:subject>
      <dc:subject>Schulsport</dc:subject>
      <dc:subject>Befragung</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsmethode</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>Ausbildung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Till, K.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>McCormack, S.</dc:creator>
      <dc:creator>Williams, G.</dc:creator>
      <dc:creator>Baker, J.</dc:creator>
      <dc:creator>Eisenmann, J. C.</dc:creator>
      <content:encoded><![CDATA[Long-term athletic development practices have been recommended for the past two decades. However, limited research exists exploring the knowledge and skills required by practitioners to optimise long-term athletic development. Therefore, this study aimed to evaluate the knowledge, adherence, practices, and challenges of practitioners responsible for delivering long-term athletic development. A mixed methods survey was completed by 236 practitioners (e.g., sport coaches, physical education teachers) consisting of four parts; 1) demographics, 2) knowledge, 3) adherence, and 4) practices and challenges. Quantitative and qualitative data were analysed by Friedman`s analysis of variance and thematic analyses, respectively. Quantitative findings showed practitioners 1) recognised their responsibility for delivering long-term athletic development, 2) have a familiarity with existing developmental models, and 3) had high adherence, focused upon health and wellbeing, to delivering long-term athletic development. However, practices associated with growth and maturity, monitoring and assessment, and the systematic progression and individualisation of training had lower adherence. Qualitative analysis indicated that practitioner`s perceived definitions of athleticism and long-term athletic development were inconsistent, especially according to the psychological components (i.e., confidence). Practitioners` descriptions of their long-term athletic development practices identified two higher order themes; 1) goals, in which long-term athletic development "is for life" and the importance of "an individual centered journey" highlighted as sub-themes; and 2) realities of delivering long-term athletic development, whereby variety in programme delivery, monitoring development and practical challenges were noted as key priorities. Eight practical challenges were identified including governance and priorities, resources, education, early specialization, high training volumes, staff communication, parents and youth motivation. This mixed method survey highlighted a multitude of knowledge, adherence, practices and challenges towards long-term athletic development. These novel findings can help inform policy to optimise long-term athletic development and to support the complex problem of developing a healthier, fitter and more physically active youth population.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Auswirkungen der Trainingshäufigkeit während einer 6-monatigen neuromuskulären Trainingsintervention auf Bewegungskompetenzen, Kraft und Leistung bei männlichen Jugendlichen</title>
      <pubDate>Sat, 01 Jan 2022 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4073092</link>
      <guid>https://sponet.de/sponet/Record/4073092</guid>
      <author>Lloyd, R. S.</author>
      <author>Dobbs, I. J.</author>
      <author>Wong, M. A.</author>
      <author>Moore, I. S.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Neurophysiologie</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Belastungshäufigkeit</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>Trainingsplanung</dc:subject>
      <dc:subject>neuromuskulär</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Dobbs, I. J.</dc:creator>
      <dc:creator>Wong, M. A.</dc:creator>
      <dc:creator>Moore, I. S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[Background: Youth populations benefit from neuromuscular training; however, the extent to which training frequency, baseline fitness, and maturity status moderate the response to long-term neuromuscular training in male youth remains unclear.
Hypothesis: Twice-weekly training (G2x) would induce larger improvements in movement competency and strength and power kinetics compared with once-weekly training (G1x). Maturity status and baseline fitness would also moderate the training response in strength and power kinetics.
Study Design: Nonrandomized, repeated-measures design.
Level of Evidence: Level 3
Methods: Ninety-five male athletes of varying maturity status (pre- or post-peak height velocity) were divided into G2x, G1x, or control (CON) groups. Training groups received G2x or G1x for 28 weeks. Back squat assessment (BSA) movement competency and isometric mid-thigh pull (IMTP), squat jump (SJ), and countermovement jump (CMJ) kinetics were measured pre- and postintervention.
Results: The G2x achieved significantly greater adaptations in BSA total score, IMTP allometrically scaled peak force (PFallo), IMTP peak rate-of-force development (PRFD), SJ PFallo and PRFD compared with G1x and CON (P < 0.05; d = 0.3-0.9). Baseline fitness, training frequency and maturity status were significant predictors of IMTP PFallo (R2 = 27.5%) and PRFD (R2 = 42.9%), while a combination of training frequency and baseline fitness explained a small amount of variance in SJ PFallo (R2 = 12.2%) and SJ PRFD (R2 = 6.5%). There were no significant predictors of CMJ kinetics.
Conclusion: G2x achieved significantly larger improvements in movement competency, isometric strength and concentric jump variables compared with G1x, with the training response greater in those youth with lower baseline fitness and more advanced maturity status.
Clinical Relevance: Exposure to neuromuscular training twice-weekly elicits a greater response than G1x in young male athletes. Practitioners should take maturity status, training frequency, and baseline fitness levels of young male athletes into account when interpreting testing data, as these variables appear to moderate training responsiveness.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Beeinflusst die motorische Koordination die wahrnehmungskognitiven und physischen Faktoren der Beweglichkeit bei jungen Fußballspielern in einer sportartspezifischen Beweglichkeitsaufgabe?</title>
      <pubDate>Mon, 01 Jan 2024 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4072391</link>
      <guid>https://sponet.de/sponet/Record/4072391</guid>
      <author>Menezes, G. B.</author>
      <author>Oliveira, R. S.</author>
      <author>Ferreira, A. B. M.</author>
      <author>Assis, T. V. L.</author>
      <author>Batista, E. S.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <author>Mortatti, A. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>koordinative Fähigkeit</dc:subject>
      <dc:subject>Anthropometrie</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>Beweglichkeit</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Menezes, G. B.</dc:creator>
      <dc:creator>Oliveira, R. S.</dc:creator>
      <dc:creator>Ferreira, A. B. M.</dc:creator>
      <dc:creator>Assis, T. V. L.</dc:creator>
      <dc:creator>Batista, E. S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Mortatti, A. L.</dc:creator>
      <content:encoded><![CDATA[This study aims to determine whether motor coordination influences the perception-decision time (perceptual-cognitive factor) and movement response time (physical factor) of young soccer players in a sport-specific agility task regardless of maturation. Eighty-seven young male soccer players were analysed. Anthropometric measurements were used to determine the maturity offset, while physical qualities including agility, change of direction speed (CODS) and motor coordination were also assessed. The following variables were obtained from these tests: Motor coordination score, perception-decision time, movement response time, agility time and CODS time. Motor coordination revealed a non-significant correlation with perception-decision time (r = 0.10, p = 0.34). However, motor coordination showed negative and significant correlations with CODS time (r = 0.47, p < 0.01), agility time (r = 0.52, p < 0.01) and movement response time (r = 0.62, p < 0.01). In addition, regression analysis showed that each increase in motor coordination score was associated with significant decreases in agility time (b = 0.023), movement response time (b = 0.021) and CODS time (b = 0.021) independent of maturity offset. The results of this study indicated that motor coordination was significantly related to the physical factors of agility in young soccer players.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Der Einfluss der biologischen Reife auf die Sprintgeschwindigkeit, den Standweitsprung und die Sprungleistung bei jungen Turnerinnen</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4072109</link>
      <guid>https://sponet.de/sponet/Record/4072109</guid>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Read, P. J.</author>
      <author>Myer, G. D.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Gerätturnen</dc:subject>
      <dc:subject>Kinder- und Jugendsport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Erwachsene</dc:subject>
      <dc:subject>biologisches Alter</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Leistungsfähigkeit</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Absprung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Schnelligkeit</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Technik</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Purpose: 
To quantify speed, peak momentum, standing long jump (SLJ), and the ratio of vertical to horizontal take-off velocity (Ratiovert-hori TOV) in young female gymnasts of different maturity status and their influence on vaulting vertical TOV. 

Methods: 
One hundred twenty gymnasts age 5-14 years were subdivided into maturity groupings using percentage of predicted adult height. Participants performed three 20-m sprints, SLJ, and straight jump vaults that were recorded using 2-dimensional video and analyzed using digitizing software. 

Results: 
All speed intervals, peak speed, peak momentum, SLJ distance, vault height, and vertical TOV increased between the early prepubertal and late prepubertal (P < .001; d = 0.65-1.10) and early prepubertal and pubertal (P < .001; d = 0.75-1.00) groups. No differences between these metrics were observed between the 2 most mature groups (d = 0.01-0.55). Multiple regression analyses revealed peak speed had the strongest association with vertical TOV (R2 = 59%) and also identified the Ratiovert-hori as a secondary determinant (R2 = 12%). A separate regression model indicated that maturity status (percentage of predicted adult height) moderately influences vertical TOV during vaulting (R2 = 41%). 

Conclusion: 
Speed and SLJ performance increase between the early prepubertal and late prepubertal years in young female gymnasts. However, given that peak speed and Ratiovert-hori combined to explain 71% of the total variance in vaulting vertical TOV, in order to increase aerial time for more advanced vaulting, practitioners should attempt to enhance peak speed alongside takeoff technique to develop gymnasts` ability to transfer linear speed to vertical TOV.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Zunehmende Reife verändert bei jugendlichen Mädchen die Kraft-Zeit-Profile bei der Landung nach vertikalen Tiefsprüngen, aber nicht deren Leistung</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4071992</link>
      <guid>https://sponet.de/sponet/Record/4071992</guid>
      <author>Pedley, J. S.</author>
      <author>DiCesare, C. A.</author>
      <author>Lloyd, R. S.</author>
      <author>Oliver, J. L.</author>
      <author>Ford, K. R.</author>
      <author>Hewett, T. E.</author>
      <author>Myer</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Landung</dc:subject>
      <dc:subject>Sportler</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Alter</dc:subject>
      <dc:subject>plyometrisches Training</dc:subject>
      <dc:subject>Band</dc:subject>
      <dc:subject>Gelenk</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Kreuzband</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>DiCesare, C. A.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Ford, K. R.</dc:creator>
      <dc:creator>Hewett, T. E.</dc:creator>
      <dc:creator>Myer</dc:creator>
      <content:encoded><![CDATA[The stretch-shortening cycle (SSC) assists in effective force attenuation upon landing and augments force generation at take-off during a drop vertical jump (DVJ). General performance outcomes such as jump height or peak measures have been used to assess SSC function in youth populations; however, these discrete metrics fail to provide insight into temporal jump-landing characteristics. This study assessed DVJ force-time profiles in 1013 middle and high-school female athletes (n = 279 prepubertal, n = 401 pubertal, and n = 333 postpubertal). Maturity status was determined using the Pubertal Maturation Observation Scale. Ground reaction force data were analyzed to extract a range of variables to characterize force-time profiles. SSC function was categorized as poor, moderate, or good dependent on the presence of an impact peak and spring-like behavior. No differences in jump height or ground contact time were observed between maturity groups (p > 0.05). Significant differences in absolute peak landing and take-off force were evident between all maturational statuses (p < 0.05). Relative to bodyweight normalized forces, only peak take-off force was significantly different between prepubertal and postpubertal groups (p < 0.05; d = 0.22). Spring-like behavior showed small improvements from pubertal to postpubertal (p < 0.05; d = 0.25). Most females displayed poor SSC function at prepubertal (79.6%), pubertal (77.3%), and postpubertal (65.5%) stages of maturity. Large increases in absolute forces occur throughout maturation in female athletes; however, only small maturational differences were found in relative force or spring-like behavior. Consequently, most girls display poor SSC function irrespective of maturity.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Externe Signale beeinflussen die Sprungleistung bei trainierten jungen Fußballspielern</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4071439</link>
      <guid>https://sponet.de/sponet/Record/4071439</guid>
      <author>Oliver, J. L.</author>
      <author>Barillas, S. R.</author>
      <author>Lloyd, R. S.</author>
      <author>Moore, I.</author>
      <author>Pedley, J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Feedback</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Prävention</dc:subject>
      <dc:tag>Signal</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Barillas, S. R.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Moore, I.</dc:creator>
      <dc:creator>Pedley, J.</dc:creator>
      <content:encoded><![CDATA[Drop jump (DJ) characteristics provide insight on power production and injury risk. The purpose of this study was to investigate the effect of external cueing on DJ characteristics in young male soccer players. Fourteen academy soccer players performed DJs with 4 different conditions, control (CONT), contact cue (CC), height cue (HC), and quiet cue (QC). Performance measures were reactive strength index (RSI), jump height, ground contact time (GCT), and take-off impulse, with injury risk reflected by impact peak, impact timing, and landing impulse. Contact cue showed a very large significant reduction in GCT (effect size [ES] > 2.0, p < 0.05), and moderate to large increase in RSI, landing impulse, and push-off impulse (ES 0.70-1.55, p < 0.05) compared with all other conditions. Contact cue also moderately increased impact peak when compared with HC and QC (ES = 0.78, p < 0.05). Height cue led to a significant increase in jump height that was moderately greater than other external cues (ES = 0.87, p < 0.05), but with only a small nonsignificant increase compared (ES 0.54, p > 0.05) with CONT. The data showed that all cues provided a specific response; CC reduced GCT and increased RSI, HC increased jump height, and QC reduced outcomes associated with injury risk. Height cue may be advantageous for young soccer players with a low training age because it shows a small to moderate increase in jump height without increasing injury risk. Young players may need to be safely progressed to be able to use a CC to facilitate high reactive strength without being exposed to undue injury risk.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Eine Untersuchung der Landschaft der grundlegenden Bewegungsfähigkeiten und der Kraftentwicklung in britischen Profifußballschulen</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4071179</link>
      <guid>https://sponet.de/sponet/Record/4071179</guid>
      <author>Smothers, N.</author>
      <author>Cropley, B.</author>
      <author>Lloyd, R.</author>
      <author>Oliver, J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Coaching</dc:subject>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Großbritannien</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Befragung</dc:subject>
      <dc:subject>Prävention</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Sportschule</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>Profisport</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Smothers, N.</dc:creator>
      <dc:creator>Cropley, B.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <dc:creator>Oliver, J.</dc:creator>
      <content:encoded><![CDATA[The purpose of this study was to investigate the landscape of Fundamental Movement Skills (FMS) and strength development in professional football (soccer) academies in the UK. To achieve this, we interviewed 16 participants, whose primary responsibility was the physical development of youth players from a variety of Elite Player Performance Plan (EPPP) categorised academies. Following abductive analysis, we identified that whilst all participants acknowledged the importance of FMS and strength development for young football players, there was variance across EPPP categories relating to: (a) the time dedicated to developing FMS and strength; (b) the number, level of qualification, and utilisation of staff; and (c) the integration of the evidence informed practice into programme design and delivery. Although the key foci of academy strength and conditioning programmes generally prioritised injury reduction, performance improvement, and building a physical base for future development, the methods used to achieve these outcomes were varied. Finally, participants reported how relationships between support staff and technical coaching staff had a direct impact on the implementation of FMS and strength programmes. We have provided rich insights into a range of factors that may facilitate or hinder FMS and strength development within youth football players and thus helped to advance understanding of the practical implications of focusing on these key skills within athlete development programmes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Absolute und allometrisch skalierte Spitzenkraft bei Tests der isometrischen Kraft und Leistung bei jungen männlichen Sportlern in verschiedenen Stadien der biologischen Entwicklung</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4070868</link>
      <guid>https://sponet.de/sponet/Record/4070868</guid>
      <author>Dobbs, I.</author>
      <author>Wong, M.</author>
      <author>Lloyd, R.</author>
      <author>Oliver, J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Entwicklungsstand</dc:subject>
      <dc:subject>Körperentwicklung</dc:subject>
      <dc:subject>Kinder- und Jugendsport</dc:subject>
      <dc:subject>Leistungsdiagnostik</dc:subject>
      <dc:subject>biologisches Alter</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:subject>isometrisch</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Dobbs, I.</dc:creator>
      <dc:creator>Wong, M.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <dc:creator>Oliver, J.</dc:creator>
      <content:encoded><![CDATA[Purpose: Literature has reported that more mature athletes tend to display greater absolute strength and power than younger athletes primarily due to the influence of increased body mass (3, 5, 6). To control for the influence of body mass on peak force (PF) production, it has been suggested to use allometric scaling methods (4, 6). Allometric scaling provides a normalized methodological approach for performance tests (2) and has been previously used to compare isometric strength measures for youth of different maturity status (1). Brownlee et al. (1) reported significant increases with maturity between groups of youth soccer players that were pre-, circa-, and post- peak height velocity (PHV). However, there is little research available on the difference between maturity groups on scaled PF for power in the counter movement jump (CMJ) and squat jump (SJ).
Methods: One-way analysis of variance (ANOVA) with post-hoc analysis was used to determine the differences between 3 maturity groups (pre-, circa- and post-PHV) for absolute peak force (PFabs) and allometrically scaled peak force (PFallo) in the IMTP, SJ, and CMJ. Effect sizes (Cohen's d) were calculated to interpret the magnitude of differences between-group. Regression slopes were conducted for each maturity group for PFabs and PFallo from the IMTP, SJ, and CMJ test using maturity status as a covariate. Linear regression slopes were created for the given variables within each maturity group to describe rate of change.
Results: Analysis for all tests and between between-group comparisons are displayed in Table 1. PFabs and PFallo showed significant increases with advancing maturity in all tests (p < 0.05). Moderate to very large differences were observed between the pre- vs. circa-PHV groups and only moderate differences between the circa- vs. post-PHV groups for PFabs and PFallo in all tests. Large to very large differences were observed in PFabs and PFallo between the pre- vs. post-PHV groups in all tests (p < 0.05). Regression slope analyses revealed the circa-PHV group were always experiencing the greatest rate of change for PFabs and PFallo in all tests (p > 0.05) (Figure 1). The high variability within this group meant the rates of change were non-significant between-groups (p > 0.05); however, slopes for IMTP PFabs (p = 0.069), SJ PFabs (p = 0.063) and SJ PFallo (p = 0.080) were approaching significance.
Conclusions: Advanced maturity resulted in significant improvements for PFabs and PFallo in the IMTP, SJ, and CMJ, suggesting that adaptations to force producing qualities accompany natural physical growth and development. The data indicates the largest differences in strength and lower body power occur around the adolescent growth spurt, based on the consistently larger effect sizes between the pre- vs. circa-PHV groups. The rates of change of were non-significant between groups, however, the regression slopes suggest that greater changes occur within the circa-PHV period which aligns with the pubertal spurt. The circa-PHV group was a period associated with greatest rate of change along with the greatest amount of variability.
Practical Applications: Owing to the natural development of strength and power qualities, practitioners should be cognizant of the individualized rates of adaptation for youth males around the pubertal spurt and its interaction with training.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Betreuung des jugendlichen Athleten während des Kraft- und Konditionstrainings: eine Übersicht und praktische Anwendung</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4070783</link>
      <guid>https://sponet.de/sponet/Record/4070783</guid>
      <author>Barillas, S. R.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <author>Pedley, J. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Leitung</dc:subject>
      <dc:subject>Theorie</dc:subject>
      <dc:subject>Konzentration</dc:subject>
      <dc:subject>Trainingseinheit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>Coaching</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:tag>Aufmerksamkeitsfokus</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Barillas, S. R.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <content:encoded><![CDATA[Verbal cues are tools used by practitioners in developing a youth athlete's motor skill abilities. External cues may optimize athletic performance and movement competencies in adults with trends for youth athletic populations following suit. However, maturation, training age, and cognitive age may interact with the efficacy of cues used. To better assist practitioners working with youth, this article reviews current empirical evidence on how youth populations respond or may respond to cues and offers practical applications.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Rahmenplan für Trainingseinheiten zur Förderung der langfristigen sportlichen Entwicklung</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4070785</link>
      <guid>https://sponet.de/sponet/Record/4070785</guid>
      <author>Till, K.</author>
      <author>Eisenmann, J.</author>
      <author>Emmonds, S.</author>
      <author>Jones, B.</author>
      <author>Mitchell, T.</author>
      <author>Cowburn, I.</author>
      <author>Tee, J.</author>
      <author>Holmes, N.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Trainingsplanung</dc:subject>
      <dc:subject>Trainingskonzeption</dc:subject>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>Alter</dc:subject>
      <dc:subject>Entwicklungsstand</dc:subject>
      <dc:subject>Aktivität</dc:subject>
      <dc:subject>Belastbarkeit</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Trainingseinheit</dc:subject>
      <dc:subject>Organisierung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Till, K.</dc:creator>
      <dc:creator>Eisenmann, J.</dc:creator>
      <dc:creator>Emmonds, S.</dc:creator>
      <dc:creator>Jones, B.</dc:creator>
      <dc:creator>Mitchell, T.</dc:creator>
      <dc:creator>Cowburn, I.</dc:creator>
      <dc:creator>Tee, J.</dc:creator>
      <dc:creator>Holmes, N.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[The implementation of long-term athletic development (LTAD) aims to improve health, physical activity, and performance of all youth. Contemporary LTAD models suggest that a broad range of physical and psychosocial competencies should be developed in youth, but few resources are available for coaches that describe "how" to achieve these outcomes. This article overviews a coaching session framework built around the following components: raise, activate, mobilize, prepare, activity, games, evaluate (RAMPAGE). The framework provides practitioners with information on what can be planned and delivered and when within a coaching session, across multiple ages and stages of development within multiple contexts (e.g., physical education and talent development).]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Der Einfluss von Wachstum, Reifung und Krafttraining auf Muskel-Sehnen- und neuromuskuläre Anpassungen: eine Übersichtsarbeit</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4070466</link>
      <guid>https://sponet.de/sponet/Record/4070466</guid>
      <author>Tumkur Anil Kumar, N.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <author>Pedley, J. S.</author>
      <author>Radnor, J. M.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Körperentwicklung</dc:subject>
      <dc:subject>Adaptation</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Aktivierung</dc:subject>
      <dc:subject>Sehne</dc:subject>
      <dc:subject>Entwicklungsstand</dc:subject>
      <dc:subject>Entwicklung</dc:subject>
      <dc:subject>Kind</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>neuromuskulär</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Tumkur Anil Kumar, N.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Radnor, J. M.</dc:creator>
      <content:encoded><![CDATA[The purpose of this article is to provide an overview of the growth, maturation and resistance training-related changes in muscle-tendon and neuromuscular mechanisms in youth, and the subsequent effect on performance. Sprinting, jumping, kicking, and throwing are common movements in sport that have been shown to develop naturally with age, with improvements in performance being attributed to growth and maturity-related changes in neuromuscular mechanisms. These changes include moderate to very large increases in muscle physiological cross-sectional area (CSA), muscle volume and thickness, tendon CSA and stiffness, fascicle length, muscle activation, pre-activation, stretch reflex control accompanied by large reductions in electro-mechanical delay and co-contraction. Furthermore, a limited number of training studies examining neuromuscular changes following four to 20 weeks of resistance training have reported trivial to moderate differences in tendon stiffness, muscle CSA, muscle thickness, and motor unit activation accompanied by reductions in electromechanical delay (EMD) in pre-pubertal children. However, the interaction of maturity- and training-related neuromuscular adaptions remains unclear. An understanding of how different neuromuscular mechanisms adapt in response to growth, maturation and training is important in order to optimise training responsiveness in youth populations. Additionally, the impact that these muscle-tendon and neuromuscular changes have on force producing capabilities underpinning performance is unclear.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Auswirkungen eines 9-monatigen neuromuskulären Trainingsprogramms auf statische &amp; dynamische Kraft-Zeit-Charakteristiken &amp; Absprunggeschwindigkeit bei jungen Turnerinnen</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4069978</link>
      <guid>https://sponet.de/sponet/Record/4069978</guid>
      <author>Moeskops, S.</author>
      <author>Read, P.</author>
      <author>Haff, G.</author>
      <author>Oliver, J.</author>
      <author>Myer, G.</author>
      <author>Cronin, J.</author>
      <author>Lloyd, R.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Gerätturnen</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsprogramm</dc:subject>
      <dc:subject>Trainingswirkung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>dynamisch</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>Parameter</dc:subject>
      <dc:subject>Absprung</dc:subject>
      <dc:subject>neuromuskulär</dc:subject>
      <dc:subject>isometrisch</dc:subject>
      <dc:tag>Kraft-Zeit-Verlauf</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Read, P.</dc:creator>
      <dc:creator>Haff, G.</dc:creator>
      <dc:creator>Oliver, J.</dc:creator>
      <dc:creator>Myer, G.</dc:creator>
      <dc:creator>Cronin, J.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <content:encoded><![CDATA[Previous research exploring the effectiveness of neuromuscular training (NMT) programs in young female gymnasts [1,2] have primarily implemented short-term interventions and failed to examine the training benefits on gymnastics performance.
Purpose: To examine the effects of a 9-month NMT intervention on isometric and dynamic force-time characteristics during strength and power tests and vertical take-off velocity during gymnastics vaulting.
Methods: Forty-three pre-pubertal female gymnasts were sub-divided into gymnastics + NMT (GYM + NMT; n = 16), gymnastics only (GYM, n = 15) groups and a maturity-matched control (CON; n = 12). Biological maturation was estimated using percentage of predicted adult height (%PAH) [3]. The GYM + NMT group followed a 9-month NMT program, consisting of 2 × 1-hr sessions/week, while the GYM and CON groups did not receive the additional training stimulus. Force-time characteristics during the isometric mid-thigh pull (IMTP), countermovement jump (CMJ), and drop jump (DJ) tests were measured at baseline (T1) and thereafter on a 3-monthly basis (T2, T3 and T4). Vertical take-off velocity during a straight jump vault was calculated using 2D video analysis. A 3 × 4 (group × time) repeated measures ANOVA with a Bonferroni post-hoc analysis was used to identify any significant between-group differences (p < 0.05), and Hedges' g to calculate effect sizes [4].
Results: Data indicated moderate significant increases in IMTP absolute peak force (PFabs) from baseline to each subsequent testing session and relative peak force (T1-T3 and T1-T4) in the GYM + NMT, and a small significant increase in PFabs from T1-T4 in the GYM group (Table 1). CMJ data showed jump height (JH) and braking impulse (Impulsebrake) significantly increased from T1-T3 in the GYM + NMT group, while propulsive impulse (Impulseprop) significantly increased from baseline to each subsequent testing session. Impulseprop was the only measure that significantly increased in the GYM group (T1-T4). DJ data revealed significant improvements in JH and reactive strength index (RSI) from T1-T3 and T1-T4 in the GYM + NMT, with no significant changes in the GYM group. Significant increases in vaulting vertical take-off velocity were only identified in the GYM + NMT (T1-T4). CON group showed no significant changes, other than a significant increase in DJ contact time (T1-T4).
Conclusions: The additional NMT stimulus significantly improved vaulting vertical take-off velocity, maximal isometric force producing capabilities, and slow and fast-stretch shortening cycle function in the GYM + NMT cohort; however, these changes were not evident for GYM or CON.
Practical Applications: Positive changes in isometric and dynamic kinetic variables can be achieved in prepubertal female gymnasts following 3 months of NMT and appear to be beyond those obtained from gymnastics alone. Practitioners should realise that the beneficial effects from NMT may take longer to transfer to vaulting performance.   

Auswirkungen eines 9-monatigen neuromuskulären Trainingsprogramms auf statische & dynamische Kraft-Zeit-Charakteristiken & Absprunggeschwindigkeit bei jungen Turnerinnen]]></content:encoded>
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    <item>
      <title>Auswirkung der biologischen Entwicklung auf die Sprungleistung bei männlichen Elite-Jugendfußballspielern</title>
      <pubDate>Fri, 01 Jan 2021 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4070006</link>
      <guid>https://sponet.de/sponet/Record/4070006</guid>
      <author>Pedley, J.</author>
      <author>Lloyd, R.</author>
      <author>Read, P.</author>
      <author>Gould, Z.</author>
      <author>Oliver, J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Alter</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>biologisches Alter</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:tag>Drop jump</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pedley, J.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <dc:creator>Read, P.</dc:creator>
      <dc:creator>Gould, Z.</dc:creator>
      <dc:creator>Oliver, J.</dc:creator>
      <content:encoded><![CDATA[Introduction: Good drop jump performance is characterised by spring-mass like behaviour underpinned by effective use of the stretch-shortening cycle (SSC) to store kinetic energy in the elastic components of the muscle-tendon unit [1-3]. Drop jump ground reaction forces have been shown to be sensitive to the physiological changes that occur as a result of maturation [4] though little is currently known about the effect of maturity status on these variables.
Purpose: To assess the effects of maturity status on a range of novel and traditional drop jump ground reaction force variables in elite male youth soccer players.
Methods: 264 subjects (age: 13.95 ± 1.99 years; height; 162.3 ± 15.2 cm; body mass; 52.27 ± 13.99 kg; maturity offset: -0.19 ± 1.85 years) from the academies of 6 elite English soccer clubs agreed to take part in the study. Maturity offset was calculated using the equation of Mirwald et al. [7]; subjects were then determined to be either pre-PHV (maturity offset < -1.0), circa-PHV (-0.5 < maturity offset < +0.5) or post-PHV (maturity offset > +1.0). Following familiarization, subjects performed the testing session which required 3 trials of a 30 cm drop jump onto a force plate (Pasco, USA) sampling at 1,000 Hz. Ground reaction force data was processed to calculate a variety of variables; jump height (JH), ground contact time (GCT), reactive strength index (RSI), center of mass displacement (CoM), vertical stiffness, peak force (PF), peak braking force (PBF), peak propulsive force (PPF), timing of PBF and PPF and spring-like behaviour correlation (SLC).
Results: There were no significant differences between any of the groups for GCT (p < 0.05). Significant increases in JH (pre-PHV: 23.74 ± 4.53 cm; circa-PHV: 28.36 ± 6.61 cm; 32.10 ± 4.78 cm) and RSI (pre-PHV: 0.79 ± 0.22; circa-PHV: 0.91 ± 0.24; post-PHV: 1.09 ± 0.31) were observed between consecutive maturity groups (p < 0.05). PBF was significantly greater in pre-PHV (4.17 ± 1.03 BW) than both circa- (3.66 ± 0.75 BW) and post-PHV (3.63 ± 0.80 BW) (p < 0.05). There were no significant differences between maturity groups for PPF (p < 0.05). PBF occurred significantly earlier in pre-PHV (57 ± 14 ms) than circa-PHV (68 ± 20 ms) and post-PHV (74 ± 18 ms) (p < 0.05). There were no differences between any maturity groups for the timing of peak propulsive force (p < 0.05). SLC increased significantly between each maturity group (pre-PHV: 0.82 ± 0.16; circa-PHV: 0.89 ± 0.09; post-PHV: 0.91 ± 0.09) (p < 0.05).
Conclusions: Pre-PHV elite male soccer players tend to display poor spring-like behaviour which is characterised by greater ground reaction force in the early period of GCT; this is typically considerably larger than the PPF. Improved SSC function would facilitate improved reutilisation of elastic energy which appears to manifest as greater jump height rather than shorter ground contact times as young athletes mature.
Practical Application: RSI is traditionally used to determine drop jump performance but the underlying kinetic variables that drive SSC function might offer greater insight into suitable coaching and training interventions in order to direct athletes towards a more spring-like profile. Research addressing the effect of cueing styles on drop jump performance demonstrates that directing an athlete's attention towards minimising ground contact time results in a larger peak landing force that occurs earlier during ground contact [8, 9].]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Der Einfluss von Temperatur, Steigung und Belastungsübertragung auf Sauerstoffverbrauch, Körperhaltung und Gangbild</title>
      <pubDate>Sun, 01 Jan 2017 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4068004</link>
      <guid>https://sponet.de/sponet/Record/4068004</guid>
      <author>Hinde, K.</author>
      <author>Lloyd, R.</author>
      <author>Low, C.</author>
      <author>Cooke, C.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Temperatur</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>O2-Aufnahme</dc:subject>
      <dc:subject>Haltung</dc:subject>
      <dc:tag>Kälte</dc:tag>
      <dc:tag>Steigung</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Hinde, K.</dc:creator>
      <dc:creator>Lloyd, R.</dc:creator>
      <dc:creator>Low, C.</dc:creator>
      <dc:creator>Cooke, C.</dc:creator>
      <content:encoded><![CDATA[Purpose: The purpose of this experiment was to evaluate the effect of load carriage in a range of temperatures to establish the interaction between cold exposure, the magnitude of change from unloaded to loaded walking and gradient.
Methods: Eleven participants (19-27 years) provided written informed consent before performing six randomly ordered walking trials in six temperatures (20, 10, 5, 0, -5, and -10 °C). Trials involved two unloaded walking bouts before and after loaded walking (18.2 kg) at 4 km/h, on 0 and 10% gradients in 4 min bouts.
Results: The change in absolute oxygen consumption (VO2) from the first unloaded bout to loaded walking was similar across all six temperatures. When repeating the second unloaded bout, VO2 at both -5 and -10 °C was greater compared to the first. At -10 °C, VO2 was increased from 1.60 ± 0.30 to 1.89 ± 0.51 L/min. Regardless of temperature, gradient had a greater effect on VO2 and heart rate (HR) than backpack load. HR was unaffected by temperature. Stride length (SL) decreased with decreasing temperature, but trunk forward lean was greater during cold exposure.
Conclusion: Decreased ambient temperature did not influence the magnitude of change in VO2 from unloaded to loaded walking. However, in cold temperatures, VO2 was significantly higher than in warm conditions. The increased VO2 in colder temperatures at the same exercise intensity is predicted to ultimately lead to earlier onset of fatigue and cessation of exercise. These results highlight the need to consider both appropriate clothing and fitness during cold exposure.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Nutzen von kinetischen und kinematischen Sprung- und Landevariablen als Prädiktoren für das Verletzungsrisiko: eine systematische Überprüfung</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4067537</link>
      <guid>https://sponet.de/sponet/Record/4067537</guid>
      <author>Pedley, J. S.</author>
      <author>Lloyd, R. S.</author>
      <author>Read, P. J.</author>
      <author>Moore, I. S.</author>
      <author>Croix, M. D. S.</author>
      <author>Myer, G. D.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Landung</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Bewegungskoordination</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Schaden</dc:subject>
      <dc:subject>Prävention</dc:subject>
      <dc:subject>Bewertung</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Bodenreaktionskraft</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Moore, I. S.</dc:creator>
      <dc:creator>Croix, M. D. S.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[Purpose: Jump-landing assessments provide a means to quantify an individual`s ability to attenuate ground reaction forces, generate lower limb explosive power and maintain joint alignment. In order to identify risk factors that can be targeted through appropriate training interventions, it is necessary to establish which (scalar) objective kinetic, kinematic, and performance measures are most associated with lower-extremity injury.
Methods: Online searches of MEDLINE, SCOPUS, EBSCOHost, SPORTDiscus and PubMed databases were completed for all articles published before March 2020 in accordance with PRISMA guidelines.
Results: 40 articles investigating nine jump-landing assessments were included in this review. The 79% of studies using drop jump (n = 14) observed an association with future injury, while only 8% of countermovement jump studies (n = 13) observed an association with injury risk. The 57% of studies using unilateral assessments found associations with risk of injury (n = 14). Studies using performance measures (jump height/distance) as outcome measure were only associated with injury risk in 30% of cases. However, those using kinetic and/or kinematic analyses (knee abduction moment, knee valgus angle, knee separation distance, peak ground reaction force) found associations with injury in 89% of studies.
Conclusion: The landing element of jump-landing assessments appears to be superior for identifying individuals at greater risk of injury; likely due to a closer representation of the injury mechanism. Consequently, jump-landing assessments that involve attenuation of impact forces such as the drop jump appear most suited for this purpose but should involve assessment of frontal plane knee motion and ground reaction forces.]]></content:encoded>
      <slash:comments>0</slash:comments>
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    <item>
      <title>Der Einfluss der biologischen Reife auf dynamische Kraft-Zeit-Variablen und die Sprungleistung bei jungen Turnerinnen</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4067539</link>
      <guid>https://sponet.de/sponet/Record/4067539</guid>
      <author>Moeskops, S.</author>
      <author>Oliver, J. L.</author>
      <author>Read, P. J.</author>
      <author>Cronin, J. B.</author>
      <author>Myer, G. D.</author>
      <author>Haff, G. G.</author>
      <author>Moore, I. S.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Gerätturnen</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Körper</dc:subject>
      <dc:subject>Entwicklung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Mechanik</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Reife</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Cronin, J. B.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Haff, G. G.</dc:creator>
      <dc:creator>Moore, I. S.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Purpose: This cross-sectional study investigated dynamic force-time variables and vaulting performance in young female gymnasts of different maturity status.
Methods: 120 gymnasts aged 5-14 years were sub-divided into maturity groupings using percent of predicted adult height (%PAH) attained. Participants performed three jumping protocols, the squat jump (SJ), countermovement jump (CMJ) and drop jump (DJ), before completing straight jump vaults that were recorded using two-dimensional video.
Results: Jumping performance improved with biological maturity evidenced by the most mature gymnasts` producing significantly more absolute force (P < 0.05; all d > 0.78), impulse (P < 0.05; all d > 0.75) and power (P < 0.05; all d > 0.91) than the least mature group, resulting in the greater jump heights (P < 0.05; all d > 0.70). While, no significant differences were observed in relative peak force across multiple tests, measures of relative peak power did significantly increase with maturity. Based upon regression analyses, maturation was found to influence vertical take-off velocity during vaulting, explaining 41% of the variance in each jumping protocol. Across all tests, the DJ was found to have the highest predictive ability of vaulting vertical take-off velocity, explaining 55% of the total variance.
Conclusion: Biological maturation impacts jump height and underpinning mechanical variables in young female gymnasts. Vaulting vertical take-off velocity appears to be influenced by maturation and various dynamic force-time variables, particularly those during DJ, which had the highest explained total variance.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Nutzung des Y-BALANCE-Tests für die vordere Reichweite als Screening-Instrument für das Verletzungsrisiko bei männlichen Spitzenfußballern</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066625</link>
      <guid>https://sponet.de/sponet/Record/4066625</guid>
      <author>Read, P. J.</author>
      <author>Oliver, J. L.</author>
      <author>Myer, G. D.</author>
      <author>Farooq, A.</author>
      <author>de Ste Croix, M.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>koordinative Fähigkeit</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Prophylaxe</dc:subject>
      <dc:subject>Asymmetrie</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:tag>Y-Balance Test</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Farooq, A.</dc:creator>
      <dc:creator>de Ste Croix, M.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Objectives: Examine growth and maturation trends in dynamic balance using the anterior reach Y-Balance test, and its utility as an injury risk screening tool.
Design: Cross sectional and prospective cohort.
Setting: Elite male youth soccer players.
Participants: 346 players grouped as pre, circa or post peak height velocity (PHV).
Main outcome measures:
Pre-season anterior reach absolute and relative Y-Balance test scores and seasonal prospective lower extremity injury monitoring.
Results: Absolute reach distances were greatest post-PHV (p < 0.05). Relative to leg length, pre-PHV achieved the highest scores and increased between-limb differences. Significant associations between injury and anterior reach scores were present in pre (OR: 0.94, CI: 0.91-0.98, p < 0.05) and circa-PHV (OR: 1.05, 95% CI: 1.05-1.10, p < 0.05). Increased age (OR: 1.49, 95% CI: 1.04-2.13, p < 0.05) and height (OR: 1.06, 95% CI: 0.99-1.13, p = 0.82) were risk factors post-PHV. No differences in injury occurrence were shown between players with absolute reach difference >4cm in any group.
Conclusions: Anterior reach scores increased injury risk, but associations were small and inconsistent. The Y-Balance should be used with caution as a screening tool in this cohort.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Zugschlittentraining für junge Athleten: wann sollte man schieben und wann ziehen</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066286</link>
      <guid>https://sponet.de/sponet/Record/4066286</guid>
      <author>Cahill, M. J.</author>
      <author>Cronin, J. B.</author>
      <author>Oliver, J. L.</author>
      <author>Clark, K. P.</author>
      <author>Lloyd, R. S.</author>
      <author>Cross, M. R.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Training</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Junioren</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Hilfsgerät</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>Beschleunigung</dc:subject>
      <dc:subject>Geschwindigkeit</dc:subject>
      <dc:subject>maximal</dc:subject>
      <dc:subject>Widerstand</dc:subject>
      <dc:tag>Zugschlitten</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Cahill, M. J.</dc:creator>
      <dc:creator>Cronin, J. B.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Clark, K. P.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Cross, M. R.</dc:creator>
      <content:encoded><![CDATA[There is a renewed interest is resisted sled training (RST); however, little uniformity exists regarding the integration of best practices in RST for young athletes. This article reviews the prescription of load, methods of RST, and the integration of sprint-specific periodized training blocks during the preparatory phase to elicit the greatest gains within different phases of sprint performance such as early acceleration, late acceleration, and the transition to maximum velocity. A targeted, long-term approach to RST may enable more effective development of speed in young athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Sieben Säulen der Prävention: wirksame Strategien für Kraft- und Konditionstrainer zur Verringerung des Verletzungsrisikos und zur Leistungssteigerung bei jungen Athleten</title>
      <description><![CDATA[https://cover.sponet.de/SPONET5-00005240.JPG]]></description>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066289</link>
      <guid>https://sponet.de/sponet/Record/4066289</guid>
      <author>Read, P. J.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Infografik</dc:format>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Prävention</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Gesundheit</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Trainingsplanung</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Infografik</dc:format>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Strength and conditioning provision for young athletes offers unique challenges and opportunities for coaches. Periods of rapid and nonuniform growth in skeletal structures can result in temporary reductions in athletic performance and heightened injury risk. Despite the increased risk of injury in young athletes, surprisingly, there is often a lack of adherence to injury prevention programs, despite a compelling body of evidence showing their effectiveness. Thus, clearer guidelines on how to best implement targeted interventions that maximize performance adaptations and minimize logistical constraints are likely beneficial for increasing their successful adoption in the field. In this article, we describe 7 pillars that provide practitioners with evidence-based and practically viable strategies that can be used effectively to reduce injury risk and increase performance in young athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Entwicklung der sportlich-motorischen Fähigkeiten von Jugendlichen</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066282</link>
      <guid>https://sponet.de/sponet/Record/4066282</guid>
      <author>Radnor, J. M.</author>
      <author>Moeskops, S.</author>
      <author>Morris, S. J.</author>
      <author>Mathews, T. A.</author>
      <author>Kumar, N. T.</author>
      <author>Pullen, B. J.</author>
      <author>Meyers, R. W.</author>
      <author>Pedley, J. S.</author>
      <author>Gould, Z. I.</author>
      <author>Oliver, J. L.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Kind</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>motorisches Lernen</dc:subject>
      <dc:subject>Bewegung</dc:subject>
      <dc:subject>Bewegungskoordination</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Bewegungsfertigkeit</dc:subject>
      <dc:subject>Fertigkeit</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Radnor, J. M.</dc:creator>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Morris, S. J.</dc:creator>
      <dc:creator>Mathews, T. A.</dc:creator>
      <dc:creator>Kumar, N. T.</dc:creator>
      <dc:creator>Pullen, B. J.</dc:creator>
      <dc:creator>Meyers, R. W.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Gould, Z. I.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Synergistic development of muscular strength and motor skill competency is central to long-term athletic development. However, these qualities need to be developed in a logical and progressive manner, and training methods need to be developmentally appropriate, engaging, and enjoyable for young athletes to help them build a positive association with strength and conditioning-based activities. This article aims to provide a resource for coaches to use when developing the athletic motor skill competencies in youth, including game-based activities, and a more structured resistance training curriculum.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Langfristiger Ansatz für die Entwicklung der Fähigkeit zum Gewichtheben bei jungen Athleten</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066283</link>
      <guid>https://sponet.de/sponet/Record/4066283</guid>
      <author>Morris, S. J.</author>
      <author>Oliver, J. L.</author>
      <author>Pedley, J. S.</author>
      <author>Haff, G. G.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Gewichtheben</dc:subject>
      <dc:subject>langfristiger Leistungsaufbau</dc:subject>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:subject>Kind</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Trainingsplanung</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Morris, S. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Pedley, J. S.</dc:creator>
      <dc:creator>Haff, G. G.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Despite previous misconceptions, youth participation in weightlifting is now recognized as safe and beneficial when delivered, programed, and monitored by a qualified professional. This article explores teaching progressions to help coaches periodize weightlifting training for young or novice athletes, with consideration to the theoretical concepts underpinning long-term athletic development. It is hoped that the structured and progressive guidelines presented in the current article will help coaches develop the weightlifting performance of their young athletes in a safe and effective manner.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Einsatz von maschinellem Lernen zur Verbesserung des Verständnisses des Verletzungsrisikos und der Verletzungsvorhersage bei männlichen Jugend-Elitefußballspielern</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4066459</link>
      <guid>https://sponet.de/sponet/Record/4066459</guid>
      <author>Oliver, J. L.</author>
      <author>Ayala, F.</author>
      <author>De Ste Croix, M. B. A.</author>
      <author>Lloyd, R. S.</author>
      <author>Myer, G. D.</author>
      <author>Read, P. J.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Verletzung</dc:subject>
      <dc:subject>Knie</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:subject>Prophylaxe</dc:subject>
      <dc:tag>maschinelles Lernen</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Oliver, J. L.</dc:creator>
      <dc:creator>Ayala, F.</dc:creator>
      <dc:creator>De Ste Croix, M. B. A.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Myer, G. D.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <content:encoded><![CDATA[Objectives: The purpose of this study was to examine whether the use of machine learning improved the ability of a neuromuscular screen to identify injury risk factors in elite male youth football players.
Design: Prospective cohort study.
Methods: 355 elite youth football players aged 10-18 years old completed a prospective pre-season neuromuscular screen that included anthropometric measures of size, as well as single leg countermovement jump (SLCMJ), single leg hop for distance (SLHD), 75% hop distance and stick (75%Hop), Y-balance anterior reach and tuck jump assessment. Injury incidence was monitored over one competitive season. Risk profiling was assessed using traditional regression analyses and compared to supervised machine learning algorithms constructed using decision trees.
Results: Using continuous data, multivariate logistic analysis identified SLCMJ asymmetry as the sole significant predictor of injury (OR 0.94, 0.92-0.97, p<0.001), with a specificity of 97.7% and sensitivity of 15.2% giving an AUC of 0.661. The best performing decision tree model provided a specificity of 74.2% and sensitivity of 55.6% with an AUC of 0.663. All variables contributed to the final machine model, with asymmetry in the SLCMJ, 75%Hop and Y-balance, plus tuck jump knee valgus and anthropometrics being the most frequent contributors.
Conclusions: Although both statistical methods reported similar accuracy, logistic regression provided very low sensitivity and only identified a single neuromuscular injury risk factor. The machine learning model provided much improved sensitivity to predict injury and identified interactions of asymmetry, knee valgus angle and body size as contributing factors to an injurious profile in youth football players.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Auswirkungen von plyometrischem Sprungtraining auf die Sprung- und Sprintleistung junger männlicher Fußballspieler: ein systematischer Überblick und Metaanalyse</title>
      <pubDate>Wed, 01 Jan 2020 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4065694</link>
      <guid>https://sponet.de/sponet/Record/4065694</guid>
      <author>Ramirez-Campillo, R.</author>
      <author>Castillo, D.</author>
      <author>Raya-González, J.</author>
      <author>Moran, J.</author>
      <author>Sáez de Villarreal, E.</author>
      <author>Lloyd, R. S.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:subject>plyometrisches Training</dc:subject>
      <dc:subject>Sprung</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Leistungsentwicklung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Literaturanalyse</dc:format>
      <dc:creator>Ramirez-Campillo, R.</dc:creator>
      <dc:creator>Castillo, D.</dc:creator>
      <dc:creator>Raya-González, J.</dc:creator>
      <dc:creator>Moran, J.</dc:creator>
      <dc:creator>Sáez de Villarreal, E.</dc:creator>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <content:encoded><![CDATA[Background: Even from a young age, modern soccer requires high levels of physical fitness development, particularly jumping and sprinting. Plyometric jump training (PJT), combined with young athletes` regular soccer sessions, has the potential to improve jumping and sprinting. However, studies exploring the effects of PJT are generally limited by small sample sizes. This problem of underpowered studies may, thus, be resolved by pooling study results in a meta-analysis.

Objective: The objective of this systematic review with meta-analysis (SRMA) was to assess the effects of plyometric jump training (PJT) on jumping and sprinting among young male soccer players.

Methods: The SRMA included peer-reviewed articles that incorporated PJT in healthy players (i.e., < 23 years of age), a control group, and a measure of jumping or sprinting. Means and standard deviations of outcomes were converted to Hedges` g effect sizes (ES), using the inverse variance random-effects model. Moderator analyses were conducted for PJT duration, frequency, total number of sessions, participants` chronological age, and FIFA age categories (i.e., U-17 vs. U-20 vs. U-23). A multivariate random-effects meta-regression was also conducted.

Results: Thirty-three studies were included, comprising 1499 participants. PJT improved vertical jump tests (ES = 0.60-0.98; all p < 0.01) and linear sprint performance (ES = 0.60-0.98; p < 0.03). Interventions of > 7 weeks and > 14 PJT sessions induced greater effects compared to PJT with = 7 weeks and = 14 total sessions on 10-m sprint performance (between group p = 0.038).

Conclusion: PJT is effective in improving jumping and sprinting performance among young male soccer players. Greater 10-m linear sprinting improvements were noted after interventions > 7-week duration and > 14 sessions, suggesting a greater return from exposure to longer PJT interventions, partially in support for the adoption of a long-term approach to athletic development in young athletes. However, with reference to the findings of the meta-regression, and those from the remaining subgroup and single factors analysis, a robust confirmation regarding the moderator role of participant`s age or PJT configuration effects on young soccer player`s fitness qualities needed.

Key Points
Jumping and sprinting are key physical fitness proxies of soccer performance for young players.
Plyometric jump training may improve both jumping and sprinting performance.
Plyometric jump training may be particularly effective after interventions > 7 weeks.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Kraft- und Konditionsstraining für junge Athleten</title>
      <pubDate>Mon, 01 Jan 2018 00:41:36 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4065312</link>
      <guid>https://sponet.de/sponet/Record/4065312</guid>
      <author>Lloyd, R. S.</author>
      <author>Radnor, J. M.</author>
      <author>Moeskops, S.</author>
      <author>Meyers, R. W.</author>
      <author>Read, P. J.</author>
      <author>Oliver, J. L.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Training</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>Trainingsmethode</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Kind</dc:subject>
      <dc:subject>Belastungsintensität</dc:subject>
      <dc:subject>Wiederherstellung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Trainierbarkeit</dc:subject>
      <dc:subject>Trainingsmittel</dc:subject>
      <dc:subject>Trainingswissenschaft</dc:subject>
      <dc:subject>Trainer</dc:subject>
      <dc:subject>allg. athlet. Ausbildung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Lloyd, R. S.</dc:creator>
      <dc:creator>Radnor, J. M.</dc:creator>
      <dc:creator>Moeskops, S.</dc:creator>
      <dc:creator>Meyers, R. W.</dc:creator>
      <dc:creator>Read, P. J.</dc:creator>
      <dc:creator>Oliver, J. L.</dc:creator>
      <content:encoded><![CDATA[Ever since Sid Robinson conducted the first experiment examining the response of children to exercise (Robinson, 1938), the field of paediatric exercise science has continued to advance our understanding of the way in which children respond to training. Now, nearly 80 years since Robinson's seminal work, the current evidence base shows that children differ to adults in terms of their acute cardiorespiratory response to exercise (Armstrong et al., 2015), metabolic and hormonal responses during exercise (Boisseau and Delamarche, 2000), ability to voluntarily activate muscle (Dotan et al., 2012), and the way in which they recover from high-intensity exercise (Falk and Dotan, 2006). Due to these physiological differences, adult-based training programmes should not be superimposed on young athletes, but rather training prescription should be commensurate with a child`s levels of technical competency, training age, psychosocial maturity and stage of maturation.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
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