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Title of Journal: Eur J Appl Physiol

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Abbravation: European Journal of Applied Physiology

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Springer-Verlag

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DOI

10.1007/s00396-016-3867-x

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1439-6327

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A physiological counterpoint to mechanistic estima

Authors: Ernst Albin Hansen Lars Vincents Jørgensen Gisela Sjøgaard
Publish Date: 2003/11/25
Volume: 91, Issue: 4, Pages: 435-442
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Abstract

Reported values of “internal power” IP during cycling generated by the muscles to overcome energy changes of moving body segments are considerably different for various biomechanical models reflecting the different criteria for estimation of IP The present aim was to calculate IP from metabolic variables and to perform a physiological evaluation of five different kinematic models for calculating IP in cycling Results showed that IP was statistically different between the kinematic models applied IP based on metabolic variables IPmet was 15 41 and 91 W at 61 88 and 115 rpm respectively being remarkably close to the kinematic estimate of one model IPWillemsCOM 14 43 and 95 W and reasonably close to another kinematic estimate IPWinter 8 29 and 81 W For all kinematic models there was no significant effect of performing 3D versus 2D analyses IP increased significantly with pedal rate – leg movements accounting for the largest fraction Further external power EP affected IP significantly such that IP was larger at moderate than at low EP at the majority of the pedal rates applied but on average this difference was only 8This study was supported by The Danish Sports Research Council Grant 980501–14 and by a grant from The Danish Elite Sport Institution Team Danmark to the author G Sjøgaard The authors thank E Vang and B ThoboCarlsen for skilled technical assistance

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