力量训练对运动性骨骼肌损伤的影响及其机制研究

Study on Mechanical Factors Involved in Sports Muscle Injury.

目的观察在不同张力下 ,离心收缩力量训练对骨骼肌组织结构、血清CK及生物力学特性的影响 ,研究运动性骨骼肌损伤与力学因素的内在联系。方法本文建立了一个活体大鼠骨骼肌力量训练及其生物力学性质的动态、定量测试模型 ,将SD雄性大鼠的踝关节背伸肌群在两组不同外加载荷下 ,进行循环式离心力量训练。结果离心运动后即刻— 1 4d ,大鼠骨骼肌的组织结构、血清CK及其力学性质变化在高张力组和低张力组之间的差异无统计学意义 (P >0 .0 5 )。结论离心收缩产生的高张力本身 。

Objective To investigate the effect of eccentric strengthening(EC) exercise on muscular structure, plasma CK and biomechanical behavior under different mechanical loadings and to study the mechanical factors involved in sports muscle injury. Method We developed an apparatus to do eccentric strength training with male SD ratsunder different mechanical loadings and to measure the biomechanical behavior. Result No significant difference(P>0.05) of muscular structure, plasma CK and biomechanical behavior were found between high and low force groups. Conclusion Skeletal muscle injuries after cyclic EC with different mechanical loadings suggested that muscle damage is not simply a function of peak muscle force.