摘要
目的:观察中等强度跑台运动后大鼠跟腱的形态结构和生物力学性能变化,探讨跑台运动后跟腱适应性变化机制。方法:3月龄雄性SD大鼠分别做长期运动和一次性运动,光镜和电镜观察运动后形态结构的变化,Instron 3365测试跟腱生物力学性能变化。结果:一次性跑台运动后大鼠跟腱力学性能没有发生明显变化,但有胶原纤维间隔增多和排列错乱及胶原原纤维之间纵向间隔增大的现象出现;长期跑台运动后可见胶原(原)纤维排列相对整齐,腱细胞功能活跃,跟腱的刚度升高(P<0.01),最大载荷增大(P<0.01),最大载荷下的能量吸收增加(P<0.05)。结论:一次性中等强度跑台运动虽会使跟腱形态结构发生一过性改变,但不会影响跟腱的力学性能。长期中等强度跑台运动使跟腱在形态结构和力学性能上产生适应性变化。
The purpose of this study was to investigate the rat＇s Achilles ＇tendon morphology and biomechanics changes after treadmill running in order to discuss the mechanism of rat＇s Achilles＇ tendon adaptation to treadmill exercise. Male rats of three month-old were arranged to have long-term running and a single of running. The structure of fiber, fibril and the activity of tenocytes were observed with optics microscope and electronic microscope and the biomechanics of Achilles＇ tendon was measured by material testing machine （Instron3365）. The result showed that hiomechanics didn＇ t change markedly while the disarrangement of fiber and the augment of longitudinal spaces fibril were observed after a single running on the treadmill. After long-time running the arrangement of fiber and the fibril became more regular. More tenocytes metabolism was high. The stiffness, the ultimate load and the energy absorbed under the ultimate load increased significantly （P〈0.05 or P〈0. 01）while the strain of ultimate load and the hysteresis remained unchanged. It concludes that the microstructure of Achilles＇ tendon has transient change to unaccustomed load. The Achilles tendon has functional adaptation related to histology and biomechanics after long-term treadmill exercise.
出处
《体育科学》
CSSCI
北大核心
2009年第1期72-76,共5页
China Sport Science
基金
江苏省社会发展项目(BS2006020)
关键词
跑台运动
跟腱
形态结构
生物力学
鼠
动物实验
treadmill exercise Achilles ＇ tendon
morphology biomechanics rat
animal experiment
