Journal of Applied Physiology
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J Appl Physiol 76: 783-786, 1994;
8750-7587/94 $5.00
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Journal of Applied Physiology, Vol 76, Issue 2 783-786, Copyright © 1994 by American Physiological Society

ARTICLES

Daily exercise improved blood pressure homeostasis of rats subjected to surgical stress

T. J. Scislo, S. E. DiCarlo and D. G. Jarjoura
Department of Physiology, Northeastern Ohio Universities College of Medicine, Rootstown 44272.

The effect of daily spontaneous running on blood pressure homeostasis (BPH) was evaluated in 19 male and 13 female control rats and 7 male and 13 female daily spontaneous running rats subjected to surgery and subsequent repetitive hemodynamic disturbances. BPH was operationally defined as the ability to maintain mean arterial pressure above 60 mmHg during the experimental protocol. The length of time the rats maintained BPH was compared across males and females and trained and control groups. Significant sex (P = 0.01) and training (P = 0.05) effects were found. Females maintained homeostasis longer than males and trained longer than controls. Sex effects were not due to differences in the body mass. The mechanisms responsible for the higher resistance to deterioration of homeostasis merit further investigation.




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