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This study was carried out to clarify the effects of forcrd (treadmill running, swimming) training and voluntary (voluntary runing) exercise training on the foreleg and hindlimb skeletal muscles of ra...ts. Methods of forced exercise training used in this study were treadmill running and swimming with weights on the tail of rats. Voluntary running on running wheel was used as voluntary execise training. The results obtained were summarized as follows: 1. Muscle fiber area of both foreleg (M. biceps brachii and M. extensor carpi radialis longus) and hindlimb (M. soleus. M. plantaris and M. extensor digitorum longus) were significantly greater after treadmill running training. 2. Forced swimming training caused hypertrophy of foreleg muscles of rats. 3. Voluntary exercise training could not cause significantly hypertrophy of both foreleg and hindlimb muscles. 4. Glycogen content in treadmill running group was significantly increased in hindlimb muscles, whill that in swimming training group was significantly increased in foreleg muscles. Glycogen content of hindlimb muscles in voluntary exercise group had a tendency to increase with total running distance. Those results of this study suggested that forced running training on treadmill was effective on foreleg and hindlimb muscle of rats, while forced swimming training was only effective on foreleg muscles, and that voluntary exercise training could not cause to effect on any muscles of rats due to individual difference in running distance.続きを見る
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