Caffeine, fluid-electrolyte balance, temperature regulation, and exercise-heat tolerance

Exerc Sport Sci Rev. 2007 Jul;35(3):135-40. doi: 10.1097/jes.0b013e3180a02cc1.


Dietitians, exercise physiologists, athletic trainers, and other sports medicine personnel commonly recommend that exercising adults and athletes refrain from caffeine use because it is a diuretic, and it may exacerbate dehydration and hyperthermia. This review, contrary to popular beliefs, proposes that caffeine consumption does not result in the following: (a) water-electrolyte imbalances or hyperthermia and (b) reduced exercise-heat tolerance.

Publication types

  • Review

MeSH terms

  • Adult
  • Body Temperature Regulation / drug effects*
  • Caffeine / adverse effects
  • Caffeine / pharmacology*
  • Dehydration / chemically induced
  • Exercise / physiology*
  • Fever / chemically induced
  • Humans
  • Water-Electrolyte Balance / drug effects*


  • Caffeine