Rate of utilization of a given fraction of W' (the curvature constant of the power-duration relationship) does not affect fatigue during severe-intensity exercise

Experimental Physiology
Kristopher Mendes de SouzaBenedito Sérgio Denadai

Abstract

What is the central question of this study? Does the rate of utilization of W' (the curvature constant of the power-duration relationship) affect fatigue during severe-intensity exercise? What is the main finding and its importance? The magnitude of fatigue after two severe-intensity exercises designed to deplete the same fraction of W' (70%) at two different rates of utilization (fast versus slow) was similar after both exercises. Moreover, the magnitude of fatigue was related to critical power (CP), supporting the contention that CP is a key determinant in fatigue development during high-intensity exercise. Thus, the CP model is a suitable approach to investigate fatigue mechanisms during high-intensity exercise. The depletion of W' (the curvature constant of the power-duration relationship) seems to contribute to fatigue during severe-intensity exercise. Therefore, the aim of this study was to determine the effect of a fast versus a slow rate of utilization of W' on the occurrence of fatigue within the severe-intensity domain. Fifteen healthy male subjects performed tests to determine the critical power, W' and peak torque in the control condition (TCON ) and immediately after two fatiguing work rates (THREE and TEN) set to ...Continue Reading

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Citations

Jul 15, 2016·Medicine and Science in Sports and Exercise·Erik AnderssonGlenn Björklund
May 18, 2016·Medicine and Science in Sports and Exercise·Kevin ThomasStuart Goodall
Mar 24, 2018·Applied Physiology, Nutrition, and Metabolism = Physiologie Appliquée, Nutrition Et Métabolisme·Paulo Cesar do Nascimento SalvadorBenedito Sérgio Denadai
Nov 6, 2018·Journal of Sports Sciences·Paul T MorganAnni Vanhatalo
May 11, 2019·Frontiers in Physiology·Paulo Cesar do Nascimento SalvadorBenedito Sérgio Denadai
Aug 6, 2021·Frontiers in Physiology·Steffan NæssThomas Losnegard

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