Impact of hydration and energy intake on performance. Even moderate levels of dehydration can compromise physical performance. The body attempts to conserve water during exercise by reducing the amount of urine produced. Heat acclimated individuals may have sweat rates in excess of 3.5 quarts per hour.
Dehydration affects power, aerobic and anaerobic parameters, and cognitive functioning.
Thirst alone is not a good indicator of fluid need. Prevention of dehydration during work in the heat requires scheduled fluid intakes. Affects of dehydration on performance. Impaired thermoregulatory ability. Reduced muscular endurance time.