Changes in biomechanics of skiing at maximal velocity caused by simulated 20-km skiing race using V2 skating technique

Scandinavian Journal of Medicine & Science in Sports
Olli OhtonenVesa Linnamo

Abstract

This study investigated how the fatigue caused by a 20-km simulated skating cross-country skiing race on snow affects the final spurt performance from a biomechanical perspective. Subjects performed a 100-m maximal skiing trial before and at the end of the simulated race. Cycle characteristics, ground reaction forces from skis and poles, and muscle activity from eight muscles were recorded during each trial. Results showed that subjects were in a fatigued state after the simulated race manifested by 11.6% lower skiing speed (P<.01). The lower skiing speed was related to an 8.0% decrease in cycle rate (P<.01), whereas cycle length was slightly decreased (tendency). In temporal patterns, relative kick time was increased (10.9%, P<.01) while relative poling time was slightly decreased (tendency). Vertical ski force production decreased by 8.3% while pole force production decreased by 26.0% (both, P<.01). Muscle activation was generally decreased in upper (39.2%) and lower body (30.7%) (both, P<.01). Together these findings show different responses to fatigue in the upper and lower body. In ski forces, fatigue was observed via longer force production times while force production levels decreased only slightly. Pole forces showed eq...Continue Reading

References

Jan 1, 1996·Medicine and Science in Sports and Exercise·B BilodeauM R Boulay
Nov 1, 1996·Medicine and Science in Sports and Exercise·K W Rundell, J R McCarthy
Sep 6, 2003·Canadian Journal of Applied Physiology = Revue Canadienne De Physiologie Appliquée·Guillaume Y MilletAlain Martin
May 5, 2005·Medicine and Science in Sports and Exercise·Hans-Christer HolmbergErich Müller
Nov 6, 2007·Physiological Measurement·T FinniS Cheng
Oct 7, 2008·Human Movement Science·Raphael ZoryAnnie Rouard
Mar 13, 2009·European Journal of Applied Physiology·Stefan Josef LindingerWalter Rapp
May 19, 2009·Journal of Biomechanics·F CignettiA Rouard
Oct 23, 2009·Journal of Sports Sciences·Ville VesterinenKeijo Häkkinen
Dec 17, 2009·Medicine and Science in Sports and Exercise·Thomas StögglStefan Lindinger
Feb 20, 2010·Journal of Strength and Conditioning Research·Jussi MikkolaAri Nummela
Aug 21, 2013·Scandinavian Journal of Medicine & Science in Sports·H MyklebustJ Hallén
Oct 4, 2013·International Journal of Sports Physiology and Performance·Øyvind Sandbakk, Hans-Christer Holmberg
Jun 14, 2016·Scandinavian Journal of Medicine & Science in Sports·G BocciaB Pellegrini

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Citations

Dec 21, 2018·International Journal of Sports Physiology and Performance·Pål HaugnesØyvind Sandbakk

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