The Japanese Journal of Physiology
Print ISSN : 0021-521X
Short Communications
Changes in Selected Ambient Temperatures Following Physical Training in Rats
Hideto TanakaMikinobu YasumatsuHiroshi Hasegawa
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2003 Volume 53 Issue 4 Pages 309-312


To clarify the mechanism of body temperature (Tb) rise following voluntary wheel-run training in rats, we investigated the behavioral thermoregulation in female rats by means of a thermal gradient system. We performed thermal gradient tests before training, 4 weeks after training started, and 2 weeks after it stopped. We also examined the effects on the selected ambient temperature and Tb with quantitative training activity. Nine female rats ran voluntarily in a wheel in the range of 6,545 from 1,665 revolutions/night. The higher the wheel-running activity, the higher the Tb level rose at rest during the daytime after 4 weeks of training. The higher-activity rats selected a higher ambient temperature after the training than before, and the Tb was maintained at a high level under this environment. Our results suggest that the rise in Tb level during rest following the wheel-run training is a regulated body temperature change.

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© 2003 by The Physiological Society of Japan
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