Physiological and thermoregulatory effects of oral taurine supplementation on exercise tolerance during forced convective cooling

Simmonds, Richard, Cole, James, Tallent, Jamie, Jeffries, Owen, Theis, Nicola ORCID: 0000-0002-0775-1355 and Waldron, Mark (2020) Physiological and thermoregulatory effects of oral taurine supplementation on exercise tolerance during forced convective cooling. European Journal of Sport Science. pp. 1-20. doi:10.1080/17461391.2020.1858175 (In Press)

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Abstract

We investigated the effects of taurine supplementation on cycling time to exhaustion in cold conditions. Eleven males cycled to exhaustion at a power output equivalent to the mid-point between ventilatory threshold and maximum aerobic power following 15-min rest in the cold (apparent temperature of ∼ 4 °C; air flow of 4.17 m·s-1). Two-hours before, participants ingested taurine (50 mg·kg-1) or placebo beverage. Pulmonary gases, carbohydrate (CHO) and fat oxidation, body temperatures, mean local sweat rate, heart rate, rate of perceived exertion (RPE) and thermal comfort were recorded. Time to exhaustion was not different between trials (taurine = 14.6 ± 4.7 min; placebo = 13.4 ± 5.6 min, P = 0.061, d = 0.27). There were no effects (P > 0.05) of taurine on core temperature, mean skin temperature or local sweat rates. However, the placebo condition showed greater (P < 0.05) reductions in arm-to-finger temperature gradient (i.e. vasodilation) across pre-exercise passive cold exposure and increased CHO oxidation (P < 0.05). Participants also reached a thermally ‘comfortable’ level quicker in the taurine condition (P < 0.05). A 50 mg·kg-1 dose of taurine did not statistically benefit endurance exercise after moderate cold exposure but conferred some potential vascular and metabolic effects.

Item Type: Article
Article Type: Article
Uncontrolled Keywords: Amino acids; Ergogenic aids; Environmental physiology; Cycling
Subjects: Q Science > QP Physiology > QP301.H75 Physiology. Sport
Divisions: Schools and Research Institutes > School of Sport and Exercise > Applied Sport & Exercise Sciences
Research Priority Areas: Sport, Exercise, Health & Wellbeing
Depositing User: Rhiannon Goodland
Date Deposited: 16 Dec 2020 09:13
Last Modified: 21 Jan 2021 11:34
URI: http://eprints.glos.ac.uk/id/eprint/9130

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