Journal article 215 views 37 downloads
Acute Effects of Caffeine and Taurine Co‐Ingestion on Time to Exhaustion and Thermoregulatory Responses to Cycling in the Heat
,
Jamie Tallent,
Shane Heffernan ,
Owen Jeffries,
Mark Waldron
European Journal of Sport Science, Volume: 25, Issue: 10, Start page: e70044
Swansea University Authors:
James Aggett, Joe Page, Jennifer Peel, Guilherme Garcia Matta , Shane Heffernan , Mark Waldron
-
PDF | Version of Record
© 2025 The Author(s). European Journal of Sport Science published by Wiley-VCH GmbH on behalf of European College of Sport Science. This is an open access article under the terms of the Creative Commons Attribution License (CC BY).
Download (1.13MB)
DOI (Published version): 10.1002/ejsc.70044
Abstract
Caffeine and taurine are commonly co-ingested pre-exercise but elicit different thermoregulatory responses; however, their combined effect on thermoregulation is unknown. Therefore, we evaluated the effects of oral caffeine and taurine co-ingestion on time to exhaustion (TTE) and thermoregulatory re...
| Published in: | European Journal of Sport Science |
|---|---|
| ISSN: | 1746-1391 1536-7290 |
| Published: |
Wiley
2025
|
| Online Access: |
Check full text
|
| URI: | https://cronfa.swan.ac.uk/Record/cronfa70332 |
| Abstract: |
Caffeine and taurine are commonly co-ingested pre-exercise but elicit different thermoregulatory responses; however, their combined effect on thermoregulation is unknown. Therefore, we evaluated the effects of oral caffeine and taurine co-ingestion on time to exhaustion (TTE) and thermoregulatory responses to cycling in the heat at the gas exchange threshold (GET). Ten healthy nonheat acclimated participants took part in a double-blind crossover study, completing a TTE in the heat (35°C; 40% relative humidity), cycling at a power output associated with the GET and 1 h after ingesting: caffeine (5 mg/kg) and taurine (50 mg/kg) combined or placebo. Pulmonary gas exchange, core and mean skin temperatures and whole-body sweat rate (WBSR) were recorded throughout. Heat production was determined using partitional calorimetry. There were no differences in TTE between conditions (p = 0.608); however, the rate of oxygen consumption (p = 0.017), minute ventilation (p = 0.029) and heat production (p = 0.019) were higher following the supplement. There were no differences between conditions for skin (p = 0.539) and core temperature (p = 0.699), mean skin blood flow (p = 0.119), respiratory exchange ratio (p = 0.546) and WBSR (p = 0.897). Pre-exercise co-ingestion of caffeine and taurine in the heat had no ergogenic effect despite increasing the ventilatory and metabolic demand. Collectively, these data indicate minimal effects on whole-body thermoregulation. |
|---|---|
| Keywords: |
endurance, environmental physiology, exercise, nutrition, performance |
| College: |
Faculty of Science and Engineering |
| Funders: |
Swansea University |
| Issue: |
10 |
| Start Page: |
e70044 |