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Article dans une revue

Effect of a 15% Increase in Preferred Pedal Rate on Time to Exhaustion During Heavy Exercise

Abstract : The aim of this study was to evaluate the effect of a 15% increase in preferred pedal rate (PPR) on both time to exhaustion and pulmonary O(2) uptake (VO(2)) response during heavy exercise. Seven competitive cyclists underwent two constant-power tests (CPT) at a power output that theoretically requires 50% of the difference in VO(2) between the second ventilatory threshold and VO(2)max (Pdelta50). Each cyclist cycled a CPT at PPR (CPTPPR) and a CPT at +15% of PPR (CPT+15%) in a randomized order. The average PPR value was 94 +/- 4 rpm, and time to exhaustion was significantly longer in CPTPPR compared with CPT+15% (465 +/- 139 vs. 303+/- 42 s, respectively; p = 0.01). A significant decrease in VO(2) values in the first minutes of exercise and a significant increase in VO(2) slow component was reported in CPT+15% compared with CPT(PPR). These data indicate that the increase of 15% PPR was associated with a decrease in exercise tolerance and a specific VO(2) response, presumably due to an increase of negative muscular work, internal work, and an altering of motor unit recruitment patterns.
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https://hal.univ-lille.fr/hal-02400470
Contributeur : Lilloa Université de Lille <>
Soumis le : mardi 24 novembre 2020 - 11:52:53
Dernière modification le : mardi 8 décembre 2020 - 14:12:21

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  • HAL Id : hal-02400470, version 1
  • PUBMED : 15064424

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Xavier Nesi, Laurent Bosquet, Serge Berthoin, Jeanne Dekerle, Patrick Pelayo. Effect of a 15% Increase in Preferred Pedal Rate on Time to Exhaustion During Heavy Exercise. Canadian Journal of Applied Physiology, Human Kinetics, 2004, Canadian journal of applied physiology = Revue canadienne de physiologie appliquee, 29, pp.146-56. ⟨hal-02400470⟩

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