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    <title>Ergebnis für Versionen - 4004687</title>
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    <item>
      <title>Beziehung zwischen Herzfrequenzvariabilität und Trainingsbelastung bei Mittelstreckenläufern</title>
      <pubDate>Sat, 01 Jan 2000 04:17:13 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/3032146</link>
      <guid>https://sponet.de/sponet/Record/3032146</guid>
      <author>Pichot, V.</author>
      <author>Roche, F.</author>
      <author>Gaspoz, J.-M.</author>
      <author>Enjolras, F.</author>
      <author>Antoniadis, A.</author>
      <author>Minini, P.</author>
      <author>Costes, F.</author>
      <author>Busso, T.</author>
      <author>Lacour, J. R.</author>
      <author>Barthelemy, J. C.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Mittelstreckenlauf</dc:subject>
      <dc:subject>Herzfrequenz</dc:subject>
      <dc:subject>Variabilität</dc:subject>
      <dc:subject>Nervensystem</dc:subject>
      <dc:subject>Belastung</dc:subject>
      <dc:subject>Wiederherstellung</dc:subject>
      <dc:subject>Belastungsgestaltung</dc:subject>
      <dc:subject>Herzfrequenzvariabilität</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pichot, V.</dc:creator>
      <dc:creator>Roche, F.</dc:creator>
      <dc:creator>Gaspoz, J.-M.</dc:creator>
      <dc:creator>Enjolras, F.</dc:creator>
      <dc:creator>Antoniadis, A.</dc:creator>
      <dc:creator>Minini, P.</dc:creator>
      <dc:creator>Costes, F.</dc:creator>
      <dc:creator>Busso, T.</dc:creator>
      <dc:creator>Lacour, J. R.</dc:creator>
      <dc:creator>Barthelemy, J. C.</dc:creator>
      <content:encoded><![CDATA[Bei 7 Mittelstreckenläufern (24,6+/-4,8 Jahre) wurde die Aktivität des autonomen Nervensystems über die HF-Variabilität während ihres normalen Trainingszyklus bestehend aus 3 Wochen intensiven Trainings und einer relativen Ruhewoche untersucht. Zweimal wöchenlich wurde über Nacht ein EKG durchgeführt und zeitliche sowie Frequenzmerkmale der HF-Variabilität mittels FOURIER und WAVELET-Transformationen berechnet. Die täglichen Trainingsbelastungen und Ermüdungswahrnehmungen wurden mittels Befragung eingeschätzt. Gleiche Kontrollen wurden in einer passiven Gruppe durchgeführt.
Ergebnisse:
Während des 3-wöchigen intensiven Trainings wurde eine signifikante und progressive Abnahme der parasympathischen Kennziffern bis zu -41% ermittelt. Während der Ruhewoche erfolgte ein signifikanter Anstieg bis zu +46%. Die Kennziffern  der sympathischen Aktivität folgten einem entgegengesetzten Trend, zuerst bis +31% und dann -24%. Die erhöhte mittlere nächtliche HF-Variation blieb unter 12%. In der Kontrollgruppe traten keine signifikanten Veränderungen auf.]]></content:encoded>
      <slash:comments>0</slash:comments>
    </item>
    <item>
      <title>Beziehung zwischen Herzfrequenzvariabilität und Trainingsbelastung bei Mittelstreckenläufern</title>
      <pubDate>Sat, 01 Jan 2000 04:17:13 +0100</pubDate>
      <link>https://sponet.de/sponet/Record/4004687</link>
      <guid>https://sponet.de/sponet/Record/4004687</guid>
      <author>Pichot, V.</author>
      <author>Roche, F.</author>
      <author>Gaspoz, J. M.</author>
      <author>Enjolras, F.</author>
      <author>Antoniadis, A.</author>
      <author>Minini, P.</author>
      <author>Costes, F.</author>
      <author>Busso, T.</author>
      <author>Lacour, J. R.</author>
      <author>Barthelemy, J. C.</author>
      <dc:format>Artikel</dc:format>
      <dc:subject>Nervensystem</dc:subject>
      <dc:subject>Mittelstreckenlauf</dc:subject>
      <dc:subject>Herzfrequenz</dc:subject>
      <dc:subject>Belastungsintensität</dc:subject>
      <dc:format>Artikel</dc:format>
      <dc:creator>Pichot, V.</dc:creator>
      <dc:creator>Roche, F.</dc:creator>
      <dc:creator>Gaspoz, J. M.</dc:creator>
      <dc:creator>Enjolras, F.</dc:creator>
      <dc:creator>Antoniadis, A.</dc:creator>
      <dc:creator>Minini, P.</dc:creator>
      <dc:creator>Costes, F.</dc:creator>
      <dc:creator>Busso, T.</dc:creator>
      <dc:creator>Lacour, J. R.</dc:creator>
      <dc:creator>Barthelemy, J. C.</dc:creator>
      <content:encoded><![CDATA[Purpose: Monitoring physical performance is of major importance in competitive sports. Indices commonly used, like resting heart rate, O2max, and hormones, cannot be easily used because of difficulties in routine use, of variations too small to be reliable, or of technical challenges in acquiring the data. 

Methods: We chose to assess autonomic nervous sytem activity using heart rate variability in seven middle-distance runners, aged 24.6 ± 4.8 yr, during their usual training cycle composed of 3 wk of heavy training periods, followed by a relative resting week. The electrocardiogram was recorded overnight twice a week and temporal and frequency indices of heart rate variability, using Fourier and Wavelet transforms, were calculated. Daily training loads and fatigue sensations were estimated with a questionnaire. Similar recordings were performed in a sedentary control group. 

Results: The results demonstrated a significant and progressive decrease in parasympathetic indices of up to -41% (P < 0.05) during the 3 wk of heavy training, followed by a significant increase during the relative resting week of up to +46% (P < 0.05). The indices of sympathetic activity followed the opposite trend, first up to +31% and then -24% (P < 0.05), respectively. The percentage increasing mean nocturnal heart rate variation remained below 12% (P < 0.05). There was no significant variation in the control group. 

Conclusion: This study confirmed that heavy training shifted the cardiac autonomic balance toward a predominance of the sympathetic over the parasympathetic drive. When recorded during the night, heart rate variability appeared to be a better tool than resting heart rate to evaluate cumulated physical fatigue, as it magnified the induced changes in autonomic nervous system activity. These results could be of interest for optimizing individual training profiles. ]]></content:encoded>
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