, Volume 39, Issue 6, pp 581–583

Acute heat/exercise stress in rats: Effects on fluid and electrolyte regulatory hormones


  • R. Francesconi
    • U.S. Army Research Institute of Environmental Medicine
  • M. Mager
    • U.S. Army Research Institute of Environmental Medicine

DOI: 10.1007/BF01971106

Cite this article as:
Francesconi, R. & Mager, M. Experientia (1983) 39: 581. doi:10.1007/BF01971106


Adult, male rats were exercised in the heat until hyperthermic exhaustion ensued. Plasma aldosterone levels were significantly (p<0.001) elevated after 8 min of exercise and remained increased throughout the exercise and recovery periods. Alternatively, plasma angiotensin I levels were unaffected during exercise, but increased significantly (p<0.001) during the recovery period. These rapid elevations in hormonal levels may be part of a sympathicoadrenal response to heat/exercise stress as well as an adaptational response to maintain plama volume during and following exercise in the heat.

Copyright information

© Birkhäuser Verlag 1983