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    <item>
      <title>Die Beziehung zwischen allgemeiner Oberkörperkraft und Stockkraftmessungen und deren Prognosewert für die Doppelstock-Sprintleistung</title>
      <pubDate>Tue, 01 Jan 2019 22:07:37 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4058765</link>
      <guid>https://sponet.de/sponet/Record/4058765</guid>
      <author>Mende, E.</author>
      <author>Schwirtz, A.</author>
      <author>Paternoster, F. K.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Skilanglauf</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Sportgerät</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Prognose</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:tag>Doppelstockschub</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Mende, E.</dc:creator>
      <dc:creator>Schwirtz, A.</dc:creator>
      <dc:creator>Paternoster, F. K.</dc:creator>
      <content:encoded><![CDATA[In recent years, there is an increasing importance of double poling (DP) performance regarding the outcome in classic cross-country skiing (XCS) races. So far, different approaches were used to predict DP performance but there is a lack of knowledge how general strength parameters are related to DP performance parameters gathered from in field-test situations. Therefore, the aim of this study was to determine the relationship between general strength measurements of different upper-body segments and pole force measurements during a DP sprint exercise. In addition, multiple linear regressions were calculated to determine the predictive power of theses variables regarding DP sprint performance, represented as maximum velocity. Thirteen none-elite cross-country skiers performed two 60 m DP sprints at maximal speed on a tartan track using roller skis. In addition, maximum isometric and concentric strength tests were performed on a motor-driven dynamometer with four major upper-body segments (trunk flexion / extension, shoulder / elbow extension). Especially the mean pole force and the strength test parameters correlated significantly (r = 0.615) in all except one comparison. However, regression analyses revealed that neither pole force parameters (R² = 0.495) nor isometric (R² = 0.456) or dynamic (R² = 0.596) strength test parameters could predict the DP performance significantly. This study showed that standardized isokinetic strength tests could be used to estimate pole force capabilities of XCS athletes. However, pole-force and strength test parameters failed to predict significantly maximal velocity during a DP sprint exercise, which might be attributed to the non-elite subject group.
Key Points

    Pole force during DP sprint performance and general upper-body strength correlate to each other significantly in recreational skiers.

    DP sprint performance can neither be predicted by pole force nor by upper-body strength parameters significantly.

    Standardized isokinetic strength tests could be used to estimate pole force capabilities of xc-ski athletes.]]></content:encoded>
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    <item>
      <title>Die Beziehung zwischen allgemeiner Oberkörperkraft und Messungen der Kraft am Stock und ihre Vorhersagekraft für die Leistung beim Doppelstockeinsatz im Sprint</title>
      <pubDate>Tue, 01 Jan 2019 22:07:37 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4057408</link>
      <guid>https://sponet.de/sponet/Record/4057408</guid>
      <author>Mende, E.</author>
      <author>Schwirtz, A.</author>
      <author>Paternoster, F. K.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Skilanglauf</dc:subject>
      <dc:subject>Sprint</dc:subject>
      <dc:subject>Kraft</dc:subject>
      <dc:subject>Arm</dc:subject>
      <dc:subject>Schulter</dc:subject>
      <dc:subject>Sportgerät</dc:subject>
      <dc:subject>Messverfahren</dc:subject>
      <dc:subject>Test</dc:subject>
      <dc:subject>Rumpf</dc:subject>
      <dc:tag>isokinetisch</dc:tag>
      <dc:format>Artikel</dc:format>
      <dc:creator>Mende, E.</dc:creator>
      <dc:creator>Schwirtz, A.</dc:creator>
      <dc:creator>Paternoster, F. K.</dc:creator>
      <content:encoded><![CDATA[In recent years, there is an increasing importance of double poling (DP) performance regarding the outcome in classic cross-country skiing (XCS) races. So far, different approaches were used to predict DP performance but there is a lack of knowledge how general strength parameters are related to DP performance parameters gathered from in field-test situations. Therefore, the aim of this study was to determine the relationship between general strength measurements of different upper-body segments and pole force measurements during a DP sprint exercise. In addition, multiple linear regressions were calculated to determine the predictive power of theses variables regarding DP sprint performance, represented as maximum velocity. Thirteen none-elite cross-country skiers performed two 60 m DP sprints at maximal speed on a tartan track using roller skis. In addition, maximum isometric and concentric strength tests were performed on a motor-driven dynamometer with four major upper-body segments (trunk flexion / extension, shoulder / elbow extension). Especially the mean pole force and the strength test parameters correlated significantly (r = 0.615) in all except one comparison. However, regression analyses revealed that neither pole force parameters (R² = 0.495) nor isometric (R² = 0.456) or dynamic (R² = 0.596) strength test parameters could predict the DP performance significantly. This study showed that standardized isokinetic strength tests could be used to estimate pole force capabilities of XCS athletes. However, pole-force and strength test parameters failed to predict significantly maximal velocity during a DP sprint exercise, which might be attributed to the non-elite subject group.
Key Points

    Pole force during DP sprint performance and general upper-body strength correlate to each other significantly in recreational skiers.

    DP sprint performance can neither be predicted by pole force nor by upper-body strength parameters significantly.

    Standardized isokinetic strength tests could be used to estimate pole force capabilities of xc-ski athletes.]]></content:encoded>
      <slash:comments>0</slash:comments>
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