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Purpose

Body cooling during and after exercise stimulates energy intake (EI). Cooling vests can also reasonably decrease body temperature under various sport occasions. This study examined the acute effects of wearing a cooling vest on EI and appetite after exercise and rest.

Methods

Fifteen healthy young men underwent four trials randomly in a thermoneutral room (~24 °C, ~40% humidity). In two exercise trials, participants performed a 60-minute run at 75% of maximum oxygen uptake and wore a cooling vest (ExC) or thermoneutral vest (ExN) from 1030–1130 h. In two resting trials, participants rested for 60 minutes and wore a cooling vest (RC) or a thermoneutral vest (RN) from 1030–1130 h. From 1130 h, participants consumed a buffet meal until satiety. EI was calculated from the buffet meal. Skin and rectal temperatures were assessed between 0930 h and 1130 h.

Results

EI was significantly higher in the ExC trial (1740 ± 642 kcal) than in the ExN trial (1584 ± 604 kcal) and higher in the RC trial (1879 ± 806 kcal) than in the RN trial (1726 ± 806 kcal). Hot foods consumption was significantly higher in the ExC trial than in the ExN trial and higher in the RC trial than in the RN trial. Subjective hunger was significantly higher in the ExC trial than in the ExN trial. Lower rectal temperatures were associated with higher relative EI (β = -8.871, P < 0.001).

Conclusions: Wearing a cooling vest increased EI after exercise or rest and increased subjective appetite only after exercise. Increased EI may result from a preference for hot foods altered by a cooling vest.