Determining Validity of Critical Power Estimated Using a Three-Minute All-Out Test in Hot Environments

Yu-Hsuan Kuo, Ching-Feng Cheng and Yu-Chi Kuo
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Yu-Hsuan Kuo: Department of Physical Education, Chinese Culture University, Taipei 11114, Taiwan
Ching-Feng Cheng: Department of Athletic Performance, National Taiwan Normal University, Taipei 11677, Taiwan
Yu-Chi Kuo: Department of Exercise and Health Science, National Taipei University of Nursing and Health Sciences, Taipei 11219, Taiwan

IJERPH, 2021, vol. 18, issue 17, 1-9

Abstract: The aim of this study was to investigate the effects of heat on the validity of end-test power (EP) derived from a 3-min all-out test (3MT), which is considered as an alternative method for determining the conventional critical power. Twelve male cyclists were required to perform incremental exercise tests (IET) and 3MTs in both high temperature (HT; 35 °C) and thermoneutral temperature (NT; 22 °C) environments. Maximal oxygen uptake (VO 2max ), and first and second ventilatory thresholds (VT 1 and VT 2 , respectively) against the power output ( w VO 2max , w VT 1 , and w VT 2 ) were measured during IETs. EP was recorded during the 3MTs. A significant correlation was observed between w VT 2 and EP under NT ( r = 0.674, p < 0.05) and under HT ( r = 0.672, p < 0.05). However, w VO 2max , w VT 1 , w VT 2 , and EP were significantly higher in NT than in HT ( p < 0.05). In conclusion, although the physiological stress induced by HT might impair exercise performance, the EP derived from 3MT can validly estimate w VT 2 under HT conditions.

Keywords: critical threshold; exercise intensity; fitness test; heat (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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