Abstract
Our interest was to quantify the role of sweat gland activation on the maintenance of skin temperature during mild exercise in the heat. Seven days of tap-water iontophoresis decreased the number of active sweat glands by 72% which significantly increased forearm skin temperature and blood flow during mild exercise (70 W) in the heat (32 °C). Skin temperature of the treated forearm was 0.5 °C warmer ( P=0.049); skin blood flow in the treated forearm was 13% higher than the control arm ( P=0.021). These results illustrate the importance of sweat evaporation on skin temperature and blood flow during exercise.
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