Caffeine ingestion compromises thermoregulation and does not improve cycling time to exhaustion in the heat amongst males.
Kevin JohnSayyam KathuriaJenny PeelJoe PageRobyn AitkenheadAimee FelsteadShane M HeffernanOwen JeffriesJamie TallentMark WaldronPublished in: European journal of applied physiology (2024)
The greater heat production and storage, as indicated by a sustained increase in core temperature, corroborate previous research showing a thermogenic effect of caffeine ingestion. When exercising at the pre-determined gas exchange threshold in the heat, 5 mg/kg of caffeine did not provide a performance benefit and increased the thermal strain of participants.