Clarkson P M, Tremblay I
Department of Exercise Science, University of Massachusetts, Amherst 01003.
J Appl Physiol (1985). 1988 Jul;65(1):1-6. doi: 10.1152/jappl.1988.65.1.1.
This study examined exercise-induced muscle damage, repair, and rapid adaptation. Eight college-age women performed three eccentric exercises of the forearm flexors. One arm performed 70 maximal contractions (70-MAX condition), and the other arm performed 24 maximal contractions (24-MAX) followed 2 wk later by 70 maximal contractions (70-MAX2). Criterion measures of serum creatine kinase, muscle soreness and pain, isometric strength, and muscle shortening were assessed before, immediately after, and for 5 days after each exercise. Significant changes in all criterion measures were found after the 70-MAX exercise with a slow recovery that was not complete by day 5 after exercise. The 24-MAX condition showed only small changes in the criterion measures. Changes in the criterion measures after the 70-MAX2 exercise were significantly smaller than those after the 70-MAX exercise. Results from this study, with regard to the ability of the muscle to adapt to exercise-induced damage, suggest that an adaptation takes place such that the muscle is more resistant to damage and any damage that does occur is repaired at a faster rate. It is also clear that a relatively small insult will produce this adaptation.
本研究考察了运动诱导的肌肉损伤、修复及快速适应性。八名大学适龄女性进行了前臂屈肌的三次离心运动。一只手臂进行70次最大收缩（70-MAX条件），另一只手臂进行24次最大收缩（24-MAX），2周后再进行70次最大收缩（70-MAX2）。在每次运动前、运动后即刻以及运动后5天评估血清肌酸激酶、肌肉酸痛和疼痛、等长力量以及肌肉缩短等标准指标。70-MAX运动后，所有标准指标均出现显著变化，恢复缓慢，运动后第5天仍未完全恢复。24-MAX条件下标准指标仅出现微小变化。70-MAX2运动后标准指标的变化显著小于70-MAX运动后。关于肌肉适应运动诱导损伤能力的本研究结果表明，会发生一种适应性变化，使得肌肉对损伤更具抵抗力，并且任何发生的损伤都能以更快的速度修复。同样明显的是，相对较小的损伤就会产生这种适应性变化。
