Thirst pp 412-421 | Cite as

The Consequences of Exercise on Thirst and Fluid Intake

  • J. E. Greenleaf
Conference paper
Part of the ILSI Human Nutrition Reviews book series (ILSI HUMAN)


Physical exercise, defined as body movement or body limb movement that increases energy utilization above the resting (sitting) level, and accompanying physiological responses can have a profound influence on fluid intake (the only practical means for rehydration in humans). The degree of thirst sensation (the desire for fluid intake) in exercising humans seems to be a poor indicator of body fluid content and may or may not be indicative of fluid requirements, depending on the duration and intensity of the exercise and on the ambient conditions (Hunt 1912; Adolph and Dill 1938; Vernon and Warner 1932). In some situations humans drink excessively when adequately hydrated, and in others they consume inadequate fluid volumes when dehydrated. Most fluid-electrolyte problems arise from body-fluid deficits, but severe hyponatraemia (water intoxication) occurs occasionally with forced intake of hypotonic fluids, for example during intense exercise for many hours without food intake. There is no evidence of short-term adaptation to dehydration in humans.


Gastric Emptying Fluid Intake Plasma Osmolality Sweat Loss Water Intoxication 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer-Verlag London Limited 1991

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  • J. E. Greenleaf

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