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      <title>Unklare Auswirkung der Supplementierung mit mehrfachgesättigter Omega-3-Fettsäure auf die Leistung im Eisschnelllauf</title>
      <pubDate>Sun, 01 Jan 2017 14:04:58 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4046534</link>
      <guid>https://sponet.de/sponet/Record/4046534</guid>
      <author>Noordhof, D. A.</author>
      <author>van Ginkel, S. L.</author>
      <author>Levels, K.</author>
      <author>van der Zwaard, S.</author>
      <author>Hofmijster, M. J.</author>
      <author>van der Laarse, W. J.</author>
      <author>de Ruiter, C. J.</author>
      <author>Jaspers, R. T.</author>
      <author>de Koning, J. J.</author>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:subject>Eisschnelllauf</dc:subject>
      <dc:subject>Ernährung</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:subject>Supplementierung</dc:subject>
      <dc:subject>Fettsäure</dc:subject>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:creator>Noordhof, D. A.</dc:creator>
      <dc:creator>van Ginkel, S. L.</dc:creator>
      <dc:creator>Levels, K.</dc:creator>
      <dc:creator>van der Zwaard, S.</dc:creator>
      <dc:creator>Hofmijster, M. J.</dc:creator>
      <dc:creator>van der Laarse, W. J.</dc:creator>
      <dc:creator>de Ruiter, C. J.</dc:creator>
      <dc:creator>Jaspers, R. T.</dc:creator>
      <dc:creator>de Koning, J. J.</dc:creator>
      <content:encoded><![CDATA[Elite speed skaters need to be able to generate a high peak power output and to sustain a high power output for the duration of the race; they therefore combine resistance-type training with endurance training. Combining these training modalities results in a smaller increment in muscle strength than when only resistance-type training is performed.]]></content:encoded>
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    <item>
      <title>Unklare Effekte einer Supplementierung mit Omega3-mehrfachgesättigten Fettsäuren auf die Eisschnelllaufleistung</title>
      <pubDate>Sun, 01 Jan 2017 14:04:58 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4043501</link>
      <guid>https://sponet.de/sponet/Record/4043501</guid>
      <author>Noordhof, D. A.</author>
      <author>van Ginkel, S. L.</author>
      <author>Levels, K.</author>
      <author>van der Zwaard, S.</author>
      <author>Hofmijster, M. J.</author>
      <author>van der Laarse, W. J.</author>
      <author>de Ruiter, C, J.</author>
      <author>Jaspers, R. T.</author>
      <author>de Koning, J. J.</author>
      <dc:format>Artikel</dc:format>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:subject>Eisschnelllauf</dc:subject>
      <dc:subject>Ernährung</dc:subject>
      <dc:subject>Supplementierung</dc:subject>
      <dc:subject>Fettsäure</dc:subject>
      <dc:subject>Relation</dc:subject>
      <dc:subject>Leistung</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:format>Kongressband, Tagungsbericht</dc:format>
      <dc:creator>Noordhof, D. A.</dc:creator>
      <dc:creator>van Ginkel, S. L.</dc:creator>
      <dc:creator>Levels, K.</dc:creator>
      <dc:creator>van der Zwaard, S.</dc:creator>
      <dc:creator>Hofmijster, M. J.</dc:creator>
      <dc:creator>van der Laarse, W. J.</dc:creator>
      <dc:creator>de Ruiter, C, J.</dc:creator>
      <dc:creator>Jaspers, R. T.</dc:creator>
      <dc:creator>de Koning, J. J.</dc:creator>
      <content:encoded><![CDATA[Elite speed skaters need to be able to generate a high peak power output and to sustain a high power output for the duration of the race; they therefore combine resistance-type training with endurance training. Combining these training modalities  results in a smaller increment in muscle strength than when only resistance-type training is performed. An increase in, among others, myoglobin concentration can possibly reduce this interference effect. Omega-3 fatty acid supplementation and hypoxia may increase myoglobin expression. As, speed skating is by nature a sport in which the active leg muscles become easily hypoxic; the goal of this study was to investigate the effect of omega-3 fatty acids on speed-skating performance and performancedetermining variables. Competitive speed skaters (n=27) were, based on performance and , randomly assigned to the placebo (corn oil) or experimental group (2400 mg omega-3 fatty acids per day). Speed skaters performed a maximal incremental test, jump tests, a Wingate, and a 3000-m skating race before and after a ~7-weeks supplementation period. The magnitude-based inferences approach was used for the statistical analysis. The average change in 3000-m speed-skating performance time, due to the supplementation period, was -0.5±2.2% in the placebo group and -0.7±2.3% in the experimental group. The difference in change scores between groups was unclear (-0.2%, 90% CL 2.2%). A likely positive effect of the intervention was found on squat jump height (difference in change scores 4.9%, 90% CL 4.2%), with likely and very likely negative effects on at the ventilatory threshold (difference in change scores -6.9%, 90% CL 6.4%) and (difference in change scores -5.5%, 90% CL 3.4%), respectively. In conclusion, omega-3 fatty acid supplementation resulted in an unclear effect on speed-skating performance. The chances on a possibly negative effect, trivial effect, and positive effect on performance were 32%, 27%, and 41%, respectively. In addition, omega-3 supplementation resulted in negative effects on aerobic performance-determining variables and variable effects (unclear, trivial or likely positive) on anaerobic performance-determining variables. Therefore, speed skaters are advised not to consume omega-3 supplements in a dose of 2400 mg per day.]]></content:encoded>
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