Adaptation of Exercise-induced Muscle Injury to Repeated Exercise
- VernacularTitle:连续运动后延迟性肌肉损伤的适应性研究
- Author:
Ye TIAN
- Publication Type:Journal Article
- Keywords:
repeated exercise, exercise-induced muscle injury, adaptation, creatine kinase
- From:
Chinese Journal of Sports Medicine
1982;0(02):-
- CountryChina
- Language:Chinese
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Abstract:
Experiments on humans and rats were conducted to observe the adaptation of exercise-induced muscle injury to repeated exercise. The results indicated that the ratings of perceived exertion (RPE) in the male students of the Physical Education Department reached to the peak immediately after one bout of exercise, while the muscle soreness, the contents of serum creatine kinase (CK) and myoglobin (Mb) reached their peak on the third day post exercise, but later they gradually recovered until to their pre-exercise level on the seventh day post exercise. More obvious changes took place in the RPE, muscle soreness, serum CK and Mb one week after exercise compared with those after one bout of exercise, however, recovery began on the fourth day post exercise in the above indices. Moreover, the results in rats showed the most serious damage in the ultrastructure of skeletal muscle 24 to 48hs after one bout of exercise, but the damage became less serious on the seventh day after exercise. Besides, after 7-day repeated exercise of the same intensity, no further damage was seen in the ultrastructure of skeletal muscle, and the damage recovered on the seventh day after exercise. The results of this study suggested that an adaptation response had taken place after repeated bouts of exercise.
