Modern sunscreen formulations do not interfere with sweating during exercise

People often wear sunscreens on hot summer days for outdoor activities. Most recreational sunscreens are designed to be water- and sweat-resistant, so sweating will not wash off the protection needed. Sweating plays a critical role in maintaining thermal balance in the body and keeping skin cool. However, it is not clear based on literature whether wearing sweat-resistant sunscreen may impede natural sweating, therefore exaggerating thermal stress and further elevating skin temperature during exercise.

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