Hydration effects on thermoregulation and performance in the heat.

  title={Hydration effects on thermoregulation and performance in the heat.},
  author={Michael N. Sawka and Scott Montain and Willliam A Latzka},
  journal={Comparative biochemistry and physiology. Part A, Molecular & integrative physiology},
  volume={128 4},
During exercise, sweat output often exceeds water intake, producing a water deficit or hypohydration. The water deficit lowers both intracellular and extracellular fluid volumes, and causes a hypotonic-hypovolemia of the blood. Aerobic exercise tasks are likely to be adversely effected by hypohydration (even in the absence of heat strain), with the potential affect being greater in hot environments. Hypohydration increases heat storage by reducing sweating rate and skin blood flow responses for… CONTINUE READING