Kevin John, Sayyam Kathuria, Jenny Peel, Joe Page, Robyn Aitkenhead, Aimee Felstead, Shane M Heffernan, Owen Jeffries, Jamie Tallent, Mark Waldron
PURPOSE: Caffeine is a commonly used ergogenic aid for endurance events; however, its efficacy and safety have been questioned in hot environmental conditions. The aim of this study was to investigate the effects of acute caffeine supplementation on cycling time to exhaustion and thermoregulation in the heat. METHODS: In a double-blind, randomised, cross-over trial, 12 healthy caffeine-habituated and unacclimatised males cycled to exhaustion in the heat (35 °C, 40% RH) at an intensity associated with the thermoneutral gas exchange threshold, on two separate occasions, 60 min after ingesting caffeine (5 mg/kg) or placebo (5 mg/kg)...
April 3, 2024: European Journal of Applied Physiology