EFFECT OF STRETCH TRAINING FOR POST-INJURED SKELETAL MUSCLE ON THE MUSCULAR CONTRACTILITY AND RELAXATION

摘要

The purpose of this study is to identify the effect of the post-injured skeletal muscle training on its contractive strength and relaxation. From the 46 SD rats, 10 are randomly taken as the control group; the others are acutely strained in the triceps surae muscles under the same condition and then further randomly divided into natural recovery group and stretched training group. Their isometric muscular contractive strength and stress relaxation of the gastrocnemius are respectively tested on the 2nd day, 10th day, 17th day, 24th day and 30th day. For the early-stage slight and moderate muscle injuries, the great changes in their muscular contractive strength are mainly caused by inflammation. The early-stage recovery of their contractive strength is not consistent in time with the repair of muscular structure, which may be the major causes of the muscular re-injury. Stretch training, at the early stage, has a negative effect on the recovery of the muscular functions; however, it greatly helps it at the late stage.