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Naloxone blocks exercise-stimulated water intake in the rat

Authors
Journal
Life Sciences
0024-3205
Publisher
Elsevier
Publication Date
Volume
32
Issue
22
Identifiers
DOI: 10.1016/0024-3205(83)90233-3
Disciplines
  • Biology

Abstract

Abstract To examine whether opiate receptors modulate exercise-induced water intake, we measured water intake during four consecutive hours after a one-hour swim stress in male, Sprague-Dawley rats. Increased cumulative water intake was found four hours following exercise and this response was naloxone-reversible (P = 0.06). Suppression of water intake in the naloxone-treated, exercised group was most marked in the first two hours after exercise (P < 0.05). Non-exercised rats consumed water at a constant, linear rate (P < 0.05) whether treated with naloxone or saline. These results indicate an endogenous opioid role in regulating exercise-induced water intake in the rat, but do not delineate whether this role reflects a non-specific stress behavior or specific physiological processes related to thirst.

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