Thirst motivation also operates during exercise. In short-term exercise, thirst motivation does not come into play because the body usually maintains its temperature. During long-term exercise, however, water intake at intervals facilitates athletic performance by helping to maintain body temperature. The motivation to drink occurs as a result of sweating, which causes the salt concentration in the body to rise during exercise, thereby causing cellular dehydration thirst. Interestingly, voluntary thirst and peripheral factors do not motivate one to take in water during prolonged exercise in the heat until it is too late. Thus, coaches should insist that athletes drink water as they perform.
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