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    <title>Results for Geladas, N. D.</title>
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    <item>
      <title>Auswirkungen simulierter Kurzstreckenflüge auf sportspezifische Leistungsfähigkeit, Schlaf und psychophysiologische Reaktionen bei Fußballspielern</title>
      <pubDate>Wed, 01 Jan 2025 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4096558</link>
      <guid>https://sponet.de/sponet/Record/4096558</guid>
      <author>Stergiopoulos, D. C.</author>
      <author>Botonis, P. G.</author>
      <author>Miliotis, P. G.</author>
      <author>Zavvos, A. X.</author>
      <author>Ntalapera, S. D.</author>
      <author>Papaleontiou, G. L.</author>
      <author>Pilatis, G. A.</author>
      <author>Soukara, E. K.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Wirkung</dc:subject>
      <dc:subject>Simulation</dc:subject>
      <dc:subject>Leistungsfähigkeit</dc:subject>
      <dc:subject>Schlaf</dc:subject>
      <dc:subject>Psychophysiologie</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Sportmedizin</dc:subject>
      <dc:tag>Reise</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Stergiopoulos, D. C.</dc:creator>
      <dc:creator>Botonis, P. G.</dc:creator>
      <dc:creator>Miliotis, P. G.</dc:creator>
      <dc:creator>Zavvos, A. X.</dc:creator>
      <dc:creator>Ntalapera, S. D.</dc:creator>
      <dc:creator>Papaleontiou, G. L.</dc:creator>
      <dc:creator>Pilatis, G. A.</dc:creator>
      <dc:creator>Soukara, E. K.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[The effects of two short-haul air travel (SHAT) of different durations on sport-specific performance, sleep, and psychophysiological indices in highly trained football players were examined. Nineteen participants completed, in a randomized order, two simulated SHAT, 1 week apart, each lasting 4 h and 2 h, followed by a control condition (CON). Generic (10-m sprint, repeated sprint ability; RSA, countermovement jump; CMJ), sport-specific performance (Hoff Test, Loughborough Soccer Passing Test; LSPT), and psychophysiological responses (sleep, heart rate variability [HRV], salivary cortisol and immunoglobulin-A [sIgA], and perceptual recovery) were evaluated before (Baseline) and after each condition. Compared to Baseline, RSA and 10-m sprint declined by 3.5% and 6%, respectively, on the day after travel (D + 1) (p < 0.001 and p < 0.01). Likewise, CMJ and total distance covered during the Hoff test decreased by 5.5% at D + 1 (p < 0.001). LSPT performance decreased only after the 4 h flight (p < 0.05). Total sleep time was reduced the night before SHAT (p < 0.001) compared to Baseline. sIgA was reduced on the day of the travel (DT) and D + 1 after both SHAT, while HRV was decreased at DT only after the 4 h SHAT (p < 0.05). Mood states remained unaffected by travel, regardless of duration. We currently suggest that short-haul air travel, whether 4 or 2 h, induces psychophysiological perturbations and performance deterioration, likely due to the travel restrictive conditions and the inadequate sleep obtained the night before the flight. Since both flights were conducted early in the morning, more research is warranted to investigate the role of departure time on football performance.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Die Auswirkung der Kohlenhydratzufuhr auf die Leistung und die Ermüdungsindizes von jugendlichen Fußballspielern während eines simulierten Spiels</title>
      <pubDate>Wed, 01 Jan 2025 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4094005</link>
      <guid>https://sponet.de/sponet/Record/4094005</guid>
      <author>Miliotis, P. G.</author>
      <author>Ntalapera, S. D.</author>
      <author>Stergiopoulos, D. C.</author>
      <author>Zavvos, A. C.</author>
      <author>Klentrou, P.</author>
      <author>Giannopoulou, I.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Simulation</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Ernährung</dc:subject>
      <dc:subject>Kohlenhydrat</dc:subject>
      <dc:subject>Wirkung</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Ermüdung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Miliotis, P. G.</dc:creator>
      <dc:creator>Ntalapera, S. D.</dc:creator>
      <dc:creator>Stergiopoulos, D. C.</dc:creator>
      <dc:creator>Zavvos, A. C.</dc:creator>
      <dc:creator>Klentrou, P.</dc:creator>
      <dc:creator>Giannopoulou, I.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[We examined the effects of carbohydrate ingestion on endurance performance and fatigue during a soccer simulation in adolescent soccer players and evaluated the protocol`s reliability. Nine (13.5 ± 0.4 years pre-PHV) soccer players performed two soccer simulation intermittent exercise sessions on the treadmill (60 min) while consuming 4 boluses of either a CHO or PLC beverage in random, counterbalanced order. Before and immediately after each exercise session, MVC was measured for the quadriceps and the hand. Participants also performed a TTE on a cycle ergometer on three occasions, after each simulation exercise session (CHO and PLC), and on another day in a rested state (CON). The simulation protocol produced an ICC of 0.96 ([0.77-0.98 95%CI], p = 0.01) for VO2, with 2.24%CV between trials, suggesting strong reliability. TTE was higher (p = 0.01) in the CHO condition (123 ± 33 s) compared to PLC (85 ± 5 s) by 29%. The relative reduction in MVCLEG was more pronounced in the PLC (22 ± 11%) condition than in CHO (14 ± 6%) (p = 0.05). Compared to the PLC, CHO resulted in lower RPElocal during the second half of the simulation protocol (p < 0.05). Carbohydrate ingestion can improve endurance performance and reduce peripheral fatigue during a reliable soccer simulation that resembles the physiological demands of a youth soccer match.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Auswirkung der glossopharyngealen Insufflation und der vollständigen Ausatmung auf die Leistung bei angehaltenem Atem und auf physiologische Parameter bei Elite Skin Divern</title>
      <pubDate>Mon, 01 Jan 2024 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4090061</link>
      <guid>https://sponet.de/sponet/Record/4090061</guid>
      <author>Bourdas, D. I.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Tauchsport</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Lunge</dc:subject>
      <dc:subject>Atmung</dc:subject>
      <dc:subject>Mangel</dc:subject>
      <dc:subject>Nervensystem</dc:subject>
      <dc:subject>Wasser</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Bourdas, D. I.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[Purpose
This study examined the physiological responses of ten elite divers to normal breathing (BHn), glossopharyngeal inhalation (BHi), and complete exhalation (BHe) prior to five maximal breath-hold (BH) efforts.

Methods
Breath-hold time (BHT), hemological variables, mean arterial pressure (MAP), other hemodynamic indices, and diaphragmatic activity (DA) were recorded. During BHs, phases were identified as easy-going (EPh: minimal DA), struggling (SPh: increased DA), PhI (MAP transition), PhII (MAP stabilization), and PhIII (steep MAP increase).

Results
BHi significantly extended BHT (309.14 ± 12.91 s) compared to BHn (288.77 ± 10.99 s) and BHe (151.18 ± 10.94 s) (P = 0.001). BHT, EPh, and SPh in BHi increased by 7.05%, 2.57%, and 11.08% over BHn, respectively. PhIII appeared earlier in BHe than in other conditions (P < 0.001) and accounted for 47.07%, 44.96%, and 60.18% of BHT in BHn, BHi, and BHe, respectively. SPh comprised 47.10%, 46.01%, and 45.13% of BHT in BHn, BHi, and BHe, respectively, with SPh onset coinciding with PhIII onset in BHn and BHi but not in BHe. Bradycardia was more pronounced in BHe, maintaining better stroke volume. No significant differences in red blood cells or maximal MAP were noted across conditions.

Conclusion
Glossopharyngeal inhalation improves BHT and extends EPh and SPh durations. PhIII onset is linked to SPh in BHn and BHi but not in BHe. BHe triggers an earlier MAP rise, leading to stronger parasympathetic responses. Despite similar maximal MAP across conditions, the higher BHT and tissue hypoxemia in BHi and BHn suggest MAP is a key limiting factor in apnoea.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Gewöhnlicher nächtlicher Schlaf, Nickerchenverhalten und Erholung nach Training und Wettkampf im Elite-Wasserball: Geschlechtsspezifische Effekte </title>
      <pubDate>Mon, 01 Jan 2024 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4088414</link>
      <guid>https://sponet.de/sponet/Record/4088414</guid>
      <author>Koutouvakis, N. G.</author>
      <author>Geladas, N. D.</author>
      <author>Mouratidis, A.</author>
      <author>Toubekis, A. G.</author>
      <author>Botonis, P. G.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Wasserball</dc:subject>
      <dc:subject>Schlaf</dc:subject>
      <dc:subject>Verhalten</dc:subject>
      <dc:subject>Wiederherstellung</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Wettkampf</dc:subject>
      <dc:subject>Geschlecht</dc:subject>
      <dc:subject>Differenz</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>Wohlbefinden</dc:subject>
      <dc:subject>Belastungsdichte</dc:subject>
      <dc:tag>Tageszeit</dc:tag>
      <dc:tag>internal load</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Koutouvakis, N. G.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Mouratidis, A.</dc:creator>
      <dc:creator>Toubekis, A. G.</dc:creator>
      <dc:creator>Botonis, P. G.</dc:creator>
      <content:encoded><![CDATA[Purpose
To examine nocturnal sleep patterns, napping behaviors, and subjective wellness responses of elite water polo players within an in-season week and to identify whether sleeping patterns differ between men and women.

Methods
Sleep characteristics of 10 male and 17 female professional water polo players were objectively assessed during 1 week of the in-season period, including 5 training days, 1 match day, and 1 day of rest. Internal load (rating of perceived exertion × duration of training or match) was assessed 30 minutes posttraining or postmatch, and the total quality of recovery was recorded every morning. A series of multilevel models were used to analyze the data. 

Results
Time in bed and wake-up time were earlier on both training (P < .001) and rest days (P < .001) than on the day of the match. Internal workload did not predict any of the players` sleeping patterns. Midday naps predicted less time in bed (P = .03) and likely less sleep time (P = .08). The total quality of recovery was predicted only by the total sleep time (P < .01). Women exhibited higher sleep efficiency (P < .001), less waking after sleep onset (P = .01), and a lower number of awakenings (P = .02) than men. 

Conclusions
The current results indicate that the nocturnal sleep patterns of elite water polo players are not associated with internal load and that women display better nocturnal sleep quality compared with men. As long naps interfere with nocturnal sleep, and total nocturnal sleep time predicts total quality of recovery, we suggest that athletes follow hygiene sleep strategies to facilitate adequate nocturnal sleep and next-day recovery.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Auswirkungen von auf einander folgendem Kraft- und hoch intensivem Intervalltraining auf die Fitness und die Spielleistung von Wasserballspielern</title>
      <pubDate>Tue, 01 Jan 2019 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4056056</link>
      <guid>https://sponet.de/sponet/Record/4056056</guid>
      <author>Botonis, P. G.</author>
      <author>Toubekis, A. G.</author>
      <author>Terzis, G. D.</author>
      <author>Geladas, N. D.</author>
      <author>Platanou, T. I.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Wasserball</dc:subject>
      <dc:subject>Spielsportart</dc:subject>
      <dc:subject>Training</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Intervallmethode</dc:subject>
      <dc:subject>Trainingsmethode</dc:subject>
      <dc:subject>Wettkampf</dc:subject>
      <dc:subject>Ermüdung</dc:subject>
      <dc:subject>Leistungsfähigkeit</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:subject>Leistungsfaktor</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Botonis, P. G.</dc:creator>
      <dc:creator>Toubekis, A. G.</dc:creator>
      <dc:creator>Terzis, G. D.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Platanou, T. I.</dc:creator>
      <content:encoded><![CDATA[The purpose of the study was to examine changes in performance and match-induced fatigue over a 27-week training period. Eight national-level water-polo players performed a 5 x 200 m swimming test to calculate velocities corresponding to blood lactate concentration of 4.0, 5.0 and 10.0 mmol.l-1 at three testing periods: i) baseline, ii) end of the pre-season (8 weeks of 4 x 4 min swimming bouts), iii) end of the in-season (8 weeks of 8 x 20 m swimming sprints). During each testing period, four competitive matches were played and repeated sprints (8 x 20 m), 400 m swimming, and shooting accuracy were evaluated at the pre- and post-match. Repeated sprint tests were also conducted at mid-game. Analysis of variance for repeated measures was used to detect changes among training periods and within games. Swimming velocities corresponding to 4.0, 5.0 and 10.0 mmol.l-1 were increased after the pre-season by 9%, 7.7%, and 6.7% (p < 0.01) and decreased following the in-season compared to the pre-season by 8.9%, 7.0% and 3.3% (p < 0.01), respectively. Pre-match repeated sprints and 400 m performance were improved after the pre-season by 4.3% and 3.8% (p < 0.01) and decreased by ~3% after the in-season compared to the pre-season (p < 0.01). Mid- and post-match repeated sprint performance was improved after the pre-season by 4.8 ± 1.4% and 4.4 ± 1.1% and remained unchanged after the in-season compared to the pre-season. Post-match 400 m speed was improved by 3.2% after the pre-season (p < 0.01) and decreased by 2.8% after the in-season (p = 0.04).Pre-season training improved players` aerobic endurance and performance. Intensified in-season training decreased aerobic power, endurance, and pre-match performance while maintaining match repeated sprint performance.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Zeitlicher Verlauf der Marker des oxidativen Stress, Entzündung und Muskelverletzung für 5 Tage nach einem Fußballspiel: Auswirkungen des Geschlechts und der Spielposition </title>
      <pubDate>Mon, 01 Jan 2018 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4050189</link>
      <guid>https://sponet.de/sponet/Record/4050189</guid>
      <author>Souglis, A.</author>
      <author>Bogdanis, G. C.</author>
      <author>Chryssanthopoulos, C.</author>
      <author>Apostolidis, N.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Stress</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Infektion</dc:subject>
      <dc:subject>Muskel</dc:subject>
      <dc:subject>Schaden</dc:subject>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Geschlecht</dc:subject>
      <dc:subject>Spielposition</dc:subject>
      <dc:tag>oxidativer Stress</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Souglis, A.</dc:creator>
      <dc:creator>Bogdanis, G. C.</dc:creator>
      <dc:creator>Chryssanthopoulos, C.</dc:creator>
      <dc:creator>Apostolidis, N.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[This study examined the influence of sex and playing position on the time course of selected oxidative stress, inflammation, and muscle damage markers after an official soccer match. Sixty professional soccer players (30 men and 30 women) were divided into 3 groups, according to their playing position: defenders, midfielders, and attackers. Each group consisted of 10 male and 10 female players. Sixty healthy volunteers (30 men and 30 women) served as control. Blood samples were taken before and after the match and daily for 5 days after the match. Analysis of variance revealed different responses over time between sex and playing positions, as shown by the 3-way interaction, for creatine kinase (CK), protein carbonyls (PCs), catalase, fibrinogen, uric acid (UA), lactate dehydrogenase, reduced glutathione, C-reactive protein, and interleukin 6 (p < 0.01). Male players had higher values compared with women of the same playing position, for all oxidative, inflammatory, and muscle damage indices (p < 0.01). Also, in both sexes, midfielders had higher peaks in all indices compared with defenders (p < 0.05). Five days after the game CK and UA concentrations had not returned to pregame levels in any exercise group, whereas PCs were still elevated in male midfielders and attackers (p < 0.05). These results show that sex and playing position influence the time course of selected oxidative stress, inflammation, and muscle damage markers after an official soccer game. This information should be taken into account by practitioners for the design of training programs after match play.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Auswirkungen von Mentholeinsatz auf der Haut während Langzeitimmersion von Schwimmern und Kontrollprobanden</title>
      <pubDate>Fri, 01 Jan 2016 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4040793</link>
      <guid>https://sponet.de/sponet/Record/4040793</guid>
      <author>Botonis, P. G.</author>
      <author>Geladas, N. D.</author>
      <author>Kounalakis, S. N.</author>
      <author>Cherouveim, E. D.</author>
      <author>Koskolou, M. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Schwimmen</dc:subject>
      <dc:subject>Ausdauerdisziplinen</dc:subject>
      <dc:subject>Langzeitausdauer</dc:subject>
      <dc:subject>Temperatur</dc:subject>
      <dc:subject>Körper</dc:subject>
      <dc:subject>Haut</dc:subject>
      <dc:subject>Thermoregulation</dc:subject>
      <dc:tag>Immersion</dc:tag>
      <dc:tag>Kaltwasseranwendung</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Botonis, P. G.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Kounalakis, S. N.</dc:creator>
      <dc:creator>Cherouveim, E. D.</dc:creator>
      <dc:creator>Koskolou, M. D.</dc:creator>
      <content:encoded><![CDATA[We hypothesized that menthol application on the skin would enhance vasoconstriction of subjects immersed in cool water, which would reduce heat loss and rectal temperature (Tre) cooling rate. Furthermore, it was hypothesized that this effect would be greater in individuals acclimatized to immersion in 24 °C water, such as swimmers. Seven swimmers (SW) and seven physical education students (CON) cycled at 60% VO2 max until Tre attained 38 °C, and were then immediately immersed in stirred water maintained at 24 °C on two occasions: without (NM) and with (M; 4.6 g per 100 mL of water) whole-body skin application of menthol cream. Heart rate, Tre, proximal-distal skin temperature gradient, oxygen uptake (VO2), electromyographic activity (EMG), and thermal sensation were measured. Tre reduction was similar among SW and CON in NM and CON in M (-0.71±0.31 °C in average), while it was smaller for SW in M (-0.37±0.18 °C, P < 0.01). VO2 and heart rate were greater in M compared with NM condition (P = 0.01). SW in M exhibited a shift of the threshold for shivering, as reflected in increased VO2 and EMG activity, toward a higher Tre compared with the other trials. Menthol application on the skin before immersion reduces heat loss, but defends Tre decline more effectively in swimmers than in non-swimmers.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Leistungsminderung und Fertigkeitsverschlechterung während eines Wasserballspiels stehen in Verbindung mit den Konditionsniveau der Athleten</title>
      <pubDate>Fri, 01 Jan 2016 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4039656</link>
      <guid>https://sponet.de/sponet/Record/4039656</guid>
      <author>Botonis, P. G.</author>
      <author>Toubekis, A. G.</author>
      <author>Terzis, G. D.</author>
      <author>Geladas, N. D.</author>
      <author>Platanou, T. I.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Wasserball</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>konditionelle Fähigkeit</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Botonis, P. G.</dc:creator>
      <dc:creator>Toubekis, A. G.</dc:creator>
      <dc:creator>Terzis, G. D.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Platanou, T. I.</dc:creator>
      <content:encoded><![CDATA[The aim of the study was to examine whether physical and technical performance deterioration after a water polo game is related to the athletes' conditioning level. Blood lactate concentration was measured during a 5 × 200-m incremental swimming test in 10 male water polo athletes to calculate the velocities corresponding to 4.0, 5.0, and 10.0 mmol7L lactate concentration (V4, V5, and V10, respectively) and define their conditioning level. All athletes participated in 5 competitive water polo games. Before (Pre), at half time (Mid), and after (Post) the first 2 games, handgrip strength and repeated sprint ability (8 × 20-m) were measured. Pre and Post the next 2 games, ball throwing velocity, shooting accuracy, and 400-m swim were evaluated. Pre, Mid, and Post the last game, the eggbeater kick test was performed. Handgrip strength, repeated sprint ability, 400-m swim performance, and ball shooting accuracy decreased after the game (8.4 ± 6.2%, 6.3 ± 3.4%, 7.0 ± 4.1%, and 20.3 ± 23.4%, respectively, p = 0.05). V4, V5, and V10 were not significantly correlated with changes in physical or technical performance after the game. Performance in 400-m swim correlated with V4 and V5 whereas changes in 400-m swim Pre-Post, correlated with changes in ball shooting accuracy and throwing velocity (r = 0.73 and r = 0.80, p = 0.05). These data suggest that V4, V5, and V10 may not correlate with performance decline in water polo. Interestingly, the 400-m swim test is connected with the decline in repeated sprints, ball shooting accuracy, and throwing velocity after a water polo game in well-trained athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Vererbbarkeit der Drehmomentfrequenzentwicklung</title>
      <pubDate>Fri, 01 Jan 2016 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4038537</link>
      <guid>https://sponet.de/sponet/Record/4038537</guid>
      <author>Lykoudi, T. K.</author>
      <author>Athanasopoulos, S. I.</author>
      <author>Geladas, N. D.</author>
      <author>Katopi, D. K.</author>
      <author>Klissouras, V.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Genetik</dc:subject>
      <dc:subject>Biomechanik</dc:subject>
      <dc:subject>Muskelphysiologie</dc:subject>
      <dc:tag>Drehmoment</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Lykoudi, T. K.</dc:creator>
      <dc:creator>Athanasopoulos, S. I.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Katopi, D. K.</dc:creator>
      <dc:creator>Klissouras, V.</dc:creator>
      <content:encoded><![CDATA[AIM: 
The aim of this study was to estimate the genetic and environmental contribution to the variation observed in the rate of torque development (RTD), which is considered an important determinant of sport performance.

METHODS: 
Nine monozygotic (MZ) and seven dizygotic (DZ) twin pairs, of both sexes aged 19-26 years, performed three isometric maximal voluntary contractions with the knee at 70 degrees and 40 degrees of flexion (0 degrees=terminal extension) on a Contrex Isokinetic dynamometer. The RTD was extracted from the force time curves and calculated in two different ways, giving rise to two indices, the maximal rate of torque development (MRTD), and the torque at the first 100 msec (F100msec). Heritability estimates (h2) were derived on the basis of intrapair variances between MZ and DZ twin pairs.

RESULTS: 
A significant genetic influence (P<0.05) was found for both RTD indices (h2=0.99, and 0.93 for MRTD, and F100msec respectively) at only 40 degrees of knee flexion, an angle associated with intensive neural activation.

CONCLUSION: 
The maximal rate of torque development of knee extensor muscles during the initial phase of their contraction and at enhanced neural activation, is under strong genetic influence.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Vergleich der Entzündungsreaktionen auf ein Fußballspiel zwischen Fußballspielern und -spielerinnen</title>
      <pubDate>Thu, 01 Jan 2015 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4035496</link>
      <guid>https://sponet.de/sponet/Record/4035496</guid>
      <author>Souglis, A. G.</author>
      <author>Papapanagiotou, A.</author>
      <author>Bogdanis, G. C.</author>
      <author>Travlos, A. K.</author>
      <author>Apostolidis, N. G.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Biochemie</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Infektion</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Souglis, A. G.</dc:creator>
      <dc:creator>Papapanagiotou, A.</dc:creator>
      <dc:creator>Bogdanis, G. C.</dc:creator>
      <dc:creator>Travlos, A. K.</dc:creator>
      <dc:creator>Apostolidis, N. G.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[The aim of this study was to compare the inflammatory responses between male and female soccer players for a period of 48 hours after an official match. Blood samples were taken from 83 subjects (22 elite male and 21 elite female soccer players and 20 male and 20 female inactive individuals) in the morning of the game day, immediately after the soccer game and 24 and 48 hours after the match. Average relative exercise intensity during the match was similar in male and female players, as indicated by mean heart rate that was 86.9 ± 4.3 and 85.6 ± 2.3% of maximal heart rate (p = 0.23), respectively. Interleukin 6 (IL-6) and tumor necrosis factor alpha (TNF-a) increased 2- to 4-fold above resting values, peaking immediately after the match. C-reactive protein (CRP) and creatine kinase peaked 24 hours after the match. Interleukin 6, CRP, and creatine kinase responses were similar in male and female players, but the peak in TNF-a was 18% higher in male players. Interleukin 6, TNF-a, and CRP at rest were lower in male and female players compared with the control subjects, suggesting a protective effect of regular exercise training regarding the inflammatory profile. The results of this study show that a soccer match induces significant inflammatory responses in both male and female players, with only TNF-a peak values being lower in females. Because of the effects of inflammatory responses on performance and health of the players, it is suggested that coaches and trainers should adjust exercise training programs after a match to promote recovery and protect the athletes' health.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Kardiovaskuläre Drift bei trainierten querschnittsgelähmten und gesunden Personen während längerer Rollstuhlbelastung: die Wirkung von Flüssigkeitsaufnahme</title>
      <pubDate>Tue, 01 Jan 2013 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4028690</link>
      <guid>https://sponet.de/sponet/Record/4028690</guid>
      <author>Zacharakis, E. D.</author>
      <author>Kounalakis, S. N.</author>
      <author>Nassis, G. P.</author>
      <author>Geladas, N.D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Parasport</dc:subject>
      <dc:subject>Rollstuhlsport</dc:subject>
      <dc:subject>Herz</dc:subject>
      <dc:subject>Kreislauf</dc:subject>
      <dc:subject>Herzfrequenz</dc:subject>
      <dc:subject>Thermoregulation</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Zacharakis, E. D.</dc:creator>
      <dc:creator>Kounalakis, S. N.</dc:creator>
      <dc:creator>Nassis, G. P.</dc:creator>
      <dc:creator>Geladas, N.D.</dc:creator>
      <content:encoded><![CDATA[The progressive heart rate (HR) increase and stroke volume (SV) decline during prolonged constant-load leg exercise signifies cardiovascular drift (CVdrift); fluid replacement is known to minimize this phenomenon. Like their able-bodied counterparts (AB), paraplegic athletes undergo prolonged exercise during training and competition, which could result in CVdrift. The aim of this study is to address the role of rehydration on preventing CVdrift in spinal cord injured (SCI) paraplegic athletes. Eight SCI athletes with an injury level between C7 and T6 and 9 AB subjects performed 60-min constant-load exercise on a wheelchair ergometer in a thermo-neutral environment. No fluid was taken in 1 trial, whereas 85% of sweat losses were replaced by drinking water in another trial. Cardic output (CO), SV, HR, and oral temperature (Tor) were determined during exercise. Prolonged exercise resulted in similar HR (18 beats/min for AB and 12 beats/min for SCI) and Tor (0.63 °C for AB and 0.71 °C for SCI) elevation and SV decline (-8.5 mL/beat for AB and -5.5 mL/beat for SCI), whereas CO remained unchanged. Water intake restrained the exercise-induced hyperthermia and resulted in smaller SV decline (-4.0 mL for AB and -3.0 mL for SCI, p < 0.01). In conclusion, CVdrift was similar in SCI and AB subjects during prolonged wheelchair exercise. Likewise, the beneficial effects of hydration in both groups were analogous.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Zusammenhang zwischen dem 20-minütigen mehrstufigen Shuttleruntest und zwei fußballspezifischen Feldtests für die Bewertung der aeroben Fitness bei erwachsenen, semiprofessionellen Fußballspielern</title>
      <pubDate>Fri, 01 Jan 2010 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4022617</link>
      <guid>https://sponet.de/sponet/Record/4022617</guid>
      <author>Nassis, G. P.</author>
      <author>Geladas, N. D.</author>
      <author>Soldatos, Y.</author>
      <author>Sotiropoulos, A.</author>
      <author>Bekris, V.</author>
      <author>Souglis, A.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Fußball</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>Feldtest</dc:subject>
      <dc:subject>Bewertung</dc:subject>
      <dc:subject>Leistungsfähigkeit</dc:subject>
      <dc:subject>aerob</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Nassis, G. P.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Soldatos, Y.</dc:creator>
      <dc:creator>Sotiropoulos, A.</dc:creator>
      <dc:creator>Bekris, V.</dc:creator>
      <dc:creator>Souglis, A.</dc:creator>
      <content:encoded><![CDATA[The aim of this study was to examine the relationship of 2 different field tests for the assessment of aerobic fitness in soccer players with the multistage 20-m test used for the evaluation of maximum oxygen uptake. Nineteen semi-professional male soccer players (age: 22.8 ± 2.5 mean ± SD) performed, under similar conditions, 3 field tests in a counterbalanced order 7 days apart. These tests were the multistage 20-m shuttle run test (MSRT), the Bangsbo test, and the Hoff test. Heart rate was recorded in all tests with telemetry, and the Borg scale was introduced at the end of exercise. Finally, 3-minute post-test lactate concentration was determined. Performance was 11.2 ± 0.9 levels in the MSRT, 1,658.9 ± 119.9 m in the Bangsbo test, and 1,798.2 ± 125.9 m in the Hoff test. There was a significant correlation between the Hoff test and performance in the MSRT (r = 0.49, p < 0.05). The Bangsbo test was not associated with the MSRT score (r = 0.26, p > 0.05). The maximum heart rate achieved in the Bangsbo test was significantly lower compared with that in the MSRT and Hoff test (Bangsbo: 186.6 ± 9.6, Hoff: 192 ± 7.6, MSRT: 190.4 ± 9.3 beats/min, p < 0.05). No difference was found in post-test lactate concentration among the 3 tests. In conclusion, the Hoff test can be used for the assessment of endurance in adult semi-professional soccer players. Coaches and teams could benefit from using the Hoff test that resembles soccer actions for the assessment of players' aerobic fitness.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Körperbaumerkmale, die die Leistung junger Schwimmer über die Sprintstrecke beeinflussen</title>
      <pubDate>Sat, 01 Jan 2005 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4009571</link>
      <guid>https://sponet.de/sponet/Record/4009571</guid>
      <author>Geladas, N. D.</author>
      <author>Nassis, G. P.</author>
      <author>Pavlicevic, S.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Schwimmen</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Körperbau</dc:subject>
      <dc:subject>Anthropometrie</dc:subject>
      <dc:subject>Prognose</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Nassis, G. P.</dc:creator>
      <dc:creator>Pavlicevic, S.</dc:creator>
      <content:encoded><![CDATA[The aim of this study was to examine the relationship between anthropometry, physical capacity, and sprint swimming performance in swimmers of both genders aged 12 - 14 years old. Anthropometric characteristics (body height and mass, total upper extremity, hand and foot lengths, chest circumference, certain body breadths, and skinfolds), as well as leg explosiveness (horizontal jump) and arm strength (handgrip strength test) were evaluated in 263 competitive swimmers (178 boys and 85 girls) aged 12 - 14 years. Skeletal age was assessed with the Tanner-Whitehouse method. All variables, except for the ankle and shoulder flexibility as well as the skeletal age, correlated with 100 m freestyle performance in boys (r = - 0.46 to - 0.73, p < 0.01). Using a split-sample approach, upper extremity length, horizontal jump, and grip strength were detected as significant predictors of 100 m freestyle performance in boys (R2 = 0.59, p < 0.01). In girls, body height, upper extremity and hand length, shoulder flexibility, and horizontal jump were all significantly related to 100 m freestyle time (r = - 0.22 to - 0.31, p < 0.05) but the degree of association was markedly lower than in boys. In addition, only 17 % of the variance in performance was explained by a combination of body height, hand length, and horizontal jump in girls. These results suggest that 100 m freestyle performance can be partially explained by anthropometry and physical capacity tests in young swimmers. The contribution of these factors to sprint swimming performance is different in boys and girls and this requires further research. These findings could be used for male young swimmers' selection.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Physiologische und technische Charakteristika junger Basketballspieler</title>
      <pubDate>Thu, 01 Jan 2004 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4008809</link>
      <guid>https://sponet.de/sponet/Record/4008809</guid>
      <author>Apostolidis, N.</author>
      <author>Nassis, G. P.</author>
      <author>Bolatoglou, T.</author>
      <author>Geladas, N. D.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Basketball</dc:subject>
      <dc:subject>Sportphysiologie</dc:subject>
      <dc:subject>Technik</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Apostolidis, N.</dc:creator>
      <dc:creator>Nassis, G. P.</dc:creator>
      <dc:creator>Bolatoglou, T.</dc:creator>
      <dc:creator>Geladas, N. D.</dc:creator>
      <content:encoded><![CDATA[AIM: The aim of this study was 2-fold: a) to describe the physiological and technical characteristics of elite young basketball players, and b) to examine the relationship between certain field and laboratory tests among these players.
METHODS: Thirteen male players of the junior's Basketball National team (age: 18.5 +/- 0.5 years, mass: 95.5 +/- 8.8 kg, height: 199.5 +/- 6.2 cm, body fat: 11.4 +/- 1.9%, means+/-SD) performed a run to exhaustion on the treadmill, the Wingate test and 2 types of vertical jump. On a separate day, the field tests (control dribble, defensive movement, speed dribble, speed running, shuttle run and dribble shuttle run) were conducted.
RESULTS: Maximal oxygen uptake (VO2max) and ventilatory threshold were 51.7 +/- 4.8 ml/kg/min and 77.6 +/- 7.0% VO2max, respectively. Maximum power output was 10.7 +/- 1.3 Watts/kg and mean power (Pmean) 8.0 +/- 0.7 Watts/kg. Counter-movement and squat jump height were 40.1 +/- 3.7 and 39.8 +/- 4.0 cm, respectively. Performance in control dribble (13.70 +/- 0.96 s), speed dribble (4.24 +/- 0.75 s), high intensity shuttle run (27.90 +/- 1.04 s) and dribble shuttle run (29.50 +/- 1.22 s) was correlated with Pmean (r=-0.58, r=-0.62, r=-0.56 and r=-0.73, respectively, p<0.05). Percent body fat was negatively correlated with all the above field tests (r=0.63, r=0.57, r=0.66, r=0.65, respectively, p<0.05).
CONCLUSION: These players presented a moderate VO2max and anaerobic power. The significant correlation between Pmean and certain field tests indicates that these tests could be used for the assessment of anaerobic capacity of young basketball players.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Physische und somatische Merkmale junger griechischer Schwimmer</title>
      <pubDate>Fri, 01 Jan 1999 01:58:14 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4037207</link>
      <guid>https://sponet.de/sponet/Record/4037207</guid>
      <author>Geladas, N. D.</author>
      <author>Pavlicevic, S.</author>
      <dc:format>Buch</dc:format>
      <dc:subject>Schwimmen</dc:subject>
      <dc:subject>Griechenland</dc:subject>
      <dc:subject>Körperbau</dc:subject>
      <dc:subject>Jugend</dc:subject>
      <dc:subject>Nachwuchsleistungssport</dc:subject>
      <dc:subject>Geschlecht</dc:subject>
      <dc:subject>männlich</dc:subject>
      <dc:subject>weiblich</dc:subject>
      <dc:subject>biologisches Alter</dc:subject>
      <dc:subject>Eignung</dc:subject>
      <dc:format>Buch</dc:format>
      <dc:creator>Geladas, N. D.</dc:creator>
      <dc:creator>Pavlicevic, S.</dc:creator>
      <content:encoded><![CDATA[Es wurde eine Längsschnittuntersuchung zur Bestimmung der somatischen und physischen Profile junger griechischer Schwimmer und Schwimmerinnen im Alter von 12,5-14,5 Jahren und zur Untersuchung des Selektionsprozesses talentierter Sportler mit Bezug auf deren Skelettalter durchgeführt.
Ergebnisse:
Keiner der gemessenen Parameter zeigte Werte, die zu den Top 10 % der Werte der griechischen Gesamtbevölkerung zählen. Physisches und somatisches Profil der jungen griechischen Schwimmer scheint zufriedenstellend zu sein, wenn man deren somatische Werte mit denen von internationalen Schwimmern gleichen Alters vergleicht. Dennoch sind griechische Schwimmer, die als talentiert eingestuft werden, in der Skelettentwicklung vorausentwickelt, was dem oben Gesagten widerspricht.
Schlussfolgerung:
Die Ergebnisse dieser Studie führen zu dem Schluss, dass jedes Selektionssystem für junge Schwimmer auf dem Skelettalter basieren sollte, nicht auf dem chronologischen Alter, da ansonsten Spätentwickler keine Chancengleichheit hätten.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
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