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Acute taurine supplementation enhances thermoregulation and endurance cycling performance in the heat

Lookup NU author(s): Dr Owen JeffriesORCiD

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by Taylor and Francis, 2019.

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Abstract

This study investigated the effects of oral taurine supplementation on cycling time to exhaustion at a fixed-intensity and thermoregulation in the heat. In a double-blind, randomised crossover design, 11 healthy males participated in a time to exhaustion test in the heat (35°C, 40% RH), cycling at the power output associated with ventilatory threshold, 2 h after ingesting: Taurine (50 mg kg⁻¹) or placebo (3 mg kg⁻¹ maltodextrin). Core and mean skin temperature, mean sweat rate, heart rate, rating of perceived exertion (RPE), thermal comfort and thermal sensation were measured during exercise and blood lactate concentration (B[La]) was measured after exercise. Taurine supplementation increased time to exhaustion by 10% (25.16 min vs. 22.43 min, p = 0.040), end sweat rate by 12.7% (687 nL min⁻¹ vs. 600 nL min⁻¹, p = 0.034) and decreased B[La] by 16.5% (5.75 mmol L⁻¹ vs. 6.85 mmol L⁻¹, p = 0.033). Core temperature was lower in the final 10% of the time to exhaustion (38.5°C vs. 38.1°C, p = 0.049). Taurine supplementation increased time to exhaustion and local sweating, while decreasing RPE and core temperature in the later stages of exercise, as well as reducing post-exercise B[La]. This study provides the evidence of taurine's role in thermoregulatory processes. These findings have implications for the short-term preparation strategies of individuals exercising in the heat. Based on these findings, a single dose of taurine 2 h prior to training or competition would provide an ergogenic and thermoregulatory effect.

Publication metadata

Author(s): Page LK, Jeffries O, Waldron M

Publication type: Article

Publication status: Published

Journal: European Journal of Sport Science

Year: 2019

Volume: 19

Issue: 8

Pages: 1101-1109

Online publication date: 18/02/2019

Acceptance date: 29/01/2019

Date deposited: 19/02/2019

ISSN (print): 1746-1391

ISSN (electronic): 1536-7290

Publisher: Taylor and Francis

URL: https://doi.org/10.1080/17461391.2019.1578417

DOI: 10.1080/17461391.2019.1578417

PubMed id: 30776254

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