We examined the effects of the exposure to stressful environment, exercise training, and aging on the glucose absorption of the small intestine in Wistar strain male rats. Everted sac method which enables us to observe the serial changes in the glucose absorption was used. Rats were forced to tail suspension (TS), which was a tool of stressful environment, for 2 weeks. The glucose absorption in everted sac of small intestine was increased following TS. The glucose absorption decreased to the control value after 2 weeks of recovery. Running exercise for 4 weeks caused to increase the glucose absorption in small intestine of suspended rats.
　These results indicated that the exposure to stressful environment caused to increase the glucose absorption in small intestine and an altered glucose absorption recovered to the control level if the rats were released from TS for the same period of the suspension. The mechanism of the increment of the glucose absorption in small intestine by exercise may be different from that by the exposure stressful environment.

DESCENTE SPORTS SCIENCE Vol.17/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE