Exercise-induced trunk fatigue decreases double poling performance in well-trained cross-country skiers

European Journal of Applied Physiology
Elias BucherOliver Faude

Abstract

To examine the effects of exercise-induced trunk fatigue on double poling performance, physiological responses and trunk strength in cross-country skiers. Sixteen well-trained male cross-country skiers completed two identical pre- and post-performance tests, separated by either a 25-min trunk fatiguing exercise sequence or rest period in a randomized, controlled cross-over design. Performance tests consisted of a maximal trunk flexion and extension test, followed by a 3-min double poling (DP) test on a ski ergometer. Peak torque during isometric trunk flexion (- 66%, p < .001) and extension (- 7.4%, p = .03) decreased in the fatigue relative to the control condition. Mean external power output during DP decreased by 14% (p < .001) and could be attributed both to reduced work per cycle (- 9%, p = .019) and a reduced cycle rate (- 6%, p = .06). Coinciding physiological changes in peak oxygen uptake (- 6%, p < .001) and peak ventilation (- 7%, p < .001) could be observed. Skiers chose a more even-pacing strategy when fatigued, with the performance difference between fatigue and control condition being most prominent during the first 2 min of the post-test. In well-trained cross-country skiers, exercise-induced trunk fatigue led to...Continue Reading

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Citations

May 12, 2019·European Journal of Applied Physiology·Thomas Losnegard
Dec 9, 2020·International Journal of Sports Physiology and Performance·Dionne A NoordhofØyvind Sandbakk
May 8, 2021·Journal of Biomechanics·Zahra Askari, Hamed Esmaeili
May 19, 2021·European Journal of Applied Physiology·Daniel BüchelJochen Baumeister

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