What causes dehydration during exercise?

Last Updated: Feb 26, 2017 03:22AM UTC

The main cause of dehydration during exercise is sweating. During high performance exercise, the average sweat loss is 1-2 liters per hour, and may be more in some occasions. The elevation of the body temperature and the reduction in the circulating water volume are important factors that can lead to dehydration, fatigue, and decreased physical performance.
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