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@Oui3Kings
Mine's pretty self explanatory.... but:
Exercising causes a person’s muscles to contract, producing heat. If this heat is not transferred from the body to the surrounding environment, the individual’s internal temperature can rise to life-threatening levels. During vigorous activity, humans excrete perspiration through pores in their skin. These water secretions absorb body heat and use this energy to evaporate into their environment, carrying the heat energy away with them. This explains, then, why our athletic shirts, shorts, and socks can become so leaden with sweat.