No effect of a commercial carbohydrate‐menthol drink on thermal perceptual measures or 15‐min time trial performance compared to commercial carbohydrate drink in hot humid conditions

Bray, P. W., Blacker, S. D., West, A. T. and Flood, T. R. (2024) No effect of a commercial carbohydrate‐menthol drink on thermal perceptual measures or 15‐min time trial performance compared to commercial carbohydrate drink in hot humid conditions. European Journal of Sport Science. pp. 1-11. ISSN 1536-7290

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Abstract

This study assessed the effect of a commercial carbohydrate menthol drink on cycling time trial (TT) performance in hot and humid conditions compared with a carbohydrate only drink. Ten participants (5 women; V̇O2max: 52.3 ± 8.6 mL kg−1 min−1, Peak Power Output: 286 ± 56 W) completed a 40‐min cycling preload (50% V̇O2max) followed by a 15‐min self‐paced TT in hot (∼35°C) and humid (∼54%) conditions on two occasions (double blind, crossover design). Every 10‐min, 85 mL of carbohydrate (CHO; SIS GO Energy, 60 g h−1) or carbohydrate and menthol (CHO + MEN; SIS Turbo+ 60 g h−1, 0.01% menthol) was swilled (∼10‐s) and ingested. Rectal temperature (Trec) and heart rate (HR) were recorded throughout. Thermal sensation (TS), thermal comfort (TC) and rating of perceived exertion (RPE) were recorded every 5‐min. Taste and aftertaste were rated from very pleasant (+5) to very unpleasant (−5). TT performance (total work; kJ) was similar between CHO (153 kJ [95% CI: 129–177 kJ]) and CHO + MEN (151 kJ [128–178 kJ]). During preload exercise, Trec increased by ∼0.9°C and was similar at the end of the TT (∼38.20°C). Mean preload HR was ∼140 b min−1 in each condition and reached ∼177 b min−1 at the end of the TT. TC was rated as ‘much too warm’ and TS rated as ‘very hot’ in both conditions. Both conditions were ‘extremely hard’ (end point RPE ∼19). All participants preferred the taste and aftertaste of the CHO drink. The commercial carbohydrate menthol drink offered no additional ergogenic benefit compared to a carbohydrate only drink during cycling exercise performed in hot and humid conditions.

Publication Type: Articles
Additional Information: © 2024 The Authors.
Uncontrolled Keywords: performance, physiology, environmental physiology, nutrition, thermal comfort
Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure > GV201 Physical education and training
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports
G Geography. Anthropology. Recreation > GV Recreation Leisure > GV557 Sports > GV711 Coaching
Q Science > QP Physiology
Divisions: Research Entities > Occupational Performance Research Group
Academic Areas > Institute of Sport > Area > Exercise Physiology
Academic Areas > Institute of Sport > Research Theme > Enhancing Sport Performance
Academic Areas > Institute of Sport > Research Theme > Health and Well-Being
Academic Areas > Institute of Sport > Research Theme > Nutritional Supplementation
Research Entities > Centre for Health and Allied Sport and Exercise Science Research (CHASER)
SWORD Depositor: Publications Router Jisc
Depositing User: Publications Router Jisc
Date Deposited: 28 Feb 2024 12:50
Last Modified: 11 Jun 2024 09:57
URI: https://eprints.chi.ac.uk/id/eprint/7390

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