Time Trials Versus Time-to-Exhaustion Tests: Effects on Critical Power, W', and Oxygen-Uptake Kinetics

International Journal of Sports Physiology and Performance
Bettina KarstenAlfred Nimmerichter

Abstract

To investigate single-day time-to-exhaustion (TTE) and time-trial (TT) -based laboratory tests values of critical power (CP), W prime (W'), and respective oxygen-uptake-kinetic responses. Twelve cyclists performed a maximal ramp test followed by 3 TTE and 3 TT efforts interspersed by 60 min recovery between efforts. Oxygen uptake ( V ˙ O 2 ) was measured during all trials. The mean response time was calculated as a description of the overall [Formula: see text]-kinetic response from the onset to 2 min of exercise. TTE-determined CP was 279 ± 52 W, and TT-determined CP was 276 ± 50 W (P = .237). Values of W' were 14.3 ± 3.4 kJ (TTE W') and 16.5 ± 4.2 kJ (TT W') (P = .028). While a high level of agreement (-12 to 17 W) and a low prediction error of 2.7% were established for CP, for W' limits of agreements were markedly lower (-8 to 3.7 kJ), with a prediction error of 18.8%. The mean standard error for TTE CP values was significantly higher than that for TT CP values (2.4% ± 1.9% vs 1.2% ± 0.7% W). The standard errors for TTE W' and TT W' were 11.2% ± 8.1% and 5.6% ± 3.6%, respectively. The [Formula: see text] response was significantly faster during TT (~22 s) than TTE (~28 s). The TT protocol with a 60-min recovery period offers...Continue Reading

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Citations

Jan 16, 2018·European Journal of Sport Science·Christoph TriskaHarald Tschan
Dec 12, 2018·Journal of Strength and Conditioning Research·Daniel Muniz-PumaresMark Glaister
Nov 15, 2018·International Journal of Sports Physiology and Performance·Mehdi KordiAndy Galbraith
Jan 9, 2021·Medicine and Science in Sports and Exercise·Christoph TriskaBettina Karsten
Feb 14, 2021·European Journal of Applied Physiology·Ben HunterDaniel Muniz-Pumares
Feb 9, 2021·Frontiers in Public Health·André B CoelhoLuis Rama
Feb 9, 2021·Frontiers in Physiology·Bettina KarstenChristoph Triska

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