Department of Physical Education, National Chiayi University, 85 Wenlong Village, Minsyong Township, Chiayi County, 62103, Taiwan.
Eur J Appl Physiol. 2011 Feb;111(2):211-23. doi: 10.1007/s00421-010-1648-7. Epub 2010 Sep 18.
This study tested the hypothesis that changes in indirect markers of muscle damage following maximal eccentric exercise would be smaller for the knee extensors (KE) and flexors (KF) compared with the elbow flexors (EF) and extensors (EE). A total of 17 sedentary men performed five sets of six maximal isokinetic (90° s(-1)) eccentric contractions of EF (range of motion, ROM: 90°-0°, 0 = full extension), EE (55°-145°), KF (90°-0°), and KE (30°-120°) using a different limb with a 4-5-week interval in a counterbalanced order. Changes in maximal isometric and concentric isokinetic strength, optimum angle, limb circumference, ROM, plasma creatine kinase activity and myoglobin concentration, muscle soreness, and echo-intensity of B-mode ultrasound images before and for 5 days following exercise were compared amongst the four exercises using two-way repeated-measures ANOVA. All variables changed significantly following EF, EE, and KF exercises, but KE exercise did not change the optimum angle, limb circumference, and echo-intensity. Compared with KF and KE, EF and EE showed significantly greater changes in all variables, without significant differences between EF and EE. Changes in all variables were significantly greater for KF than KE. For the same subjects, the magnitude of change in the dependent variables following exercise varied among the exercises. These results suggest that the two arm muscles are equally more susceptible to muscle damage than leg muscles, but KF is more susceptible to muscle damage than KE. The difference in the susceptibility to muscle damage seems to be associated with the use of muscles in daily activities.
与肱二头肌（EF）和肱三头肌（EE）相比，在最大离心运动后，间接肌肉损伤标志物的变化在膝关节伸肌（KE）和屈肌（KF）中会更小。17 名久坐男性以平衡的顺序，在 4-5 周的间隔内，使用不同的肢体进行了五组六次最大等速（90°s(-1))的离心收缩，分别为 EF（运动范围，ROM：90°-0°，0=完全伸展）、EE（55°-145°）、KF（90°-0°）和 KE（30°-120°）。在运动前后 5 天内，通过比较等长和等速向心最大力量、最佳角度、肢体周长、ROM、血浆肌酸激酶活性和肌红蛋白浓度、肌肉酸痛和 B 型超声图像的回声强度，比较了这四种运动之间的变化。EF、EE 和 KF 运动后所有变量均发生显著变化，但 KE 运动未改变最佳角度、肢体周长和回声强度。与 KF 和 KE 相比，EF 和 EE 显示出所有变量均有明显更大的变化，而 EF 和 EE 之间没有显著差异。与 KE 相比，KF 的所有变量变化均明显更大。对于同一组受试者，运动后依赖变量的变化幅度因运动而异。这些结果表明，与腿部肌肉相比，两个手臂肌肉同样更容易受到肌肉损伤，但 KF 比 KE 更容易受到肌肉损伤。肌肉损伤易感性的差异似乎与日常生活中肌肉的使用有关。
