Men sweat more than women and require more water, but women show the same physiological responses as men when performing work at the same relative intensity. Well-trained heat-acclimatized women show similar physiological responses to hot-wet and hot-dry heat as men.
Within the age range of the current U.S. military force (18 to 50 years), there is no decrement in sweating, and therefore the water requirement during exercise in the heat is unchanged.
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