等动肌力矩的增龄性发育特征

Age-related development characteristics of junior isokinetic muscle torque

背景:少年时期肌肉力量是否能够得到平衡发育对其生长发育过程中起重要作用。目的:探索少年的肌力发展的生物力学规律。方法:利用Kinitech等速测力系统对中小学男女生各30名双侧肩、髋关节屈伸肌群进行等动肌力测试,测试速度为60(°)/s,测试次数为屈伸6次。结果与结论:所有测试者的髋、肩关节屈伸肌的相对峰力矩随测试速度的增大而逐渐减小;且随年龄增长肩、髋关节屈伸肌的相对峰力矩均同步增大;小学生在不同测试速度状态下男生髋、肩关节相对峰力矩均大于女生(P<0.05),但中学生髋、肩关节相对峰力矩没有性别差异。

BACKGROUND：Balanced development growth of muscle power in junior period plays an important role in human development.OBJECTIVE：To explore the biomechanical rule of muscle power development in junior period.METHODS：Dynamic muscle power test of flexor and extensor muscles of bilateral shoulders and hip was performed in 30 boys and 30 females through the use of Kintech isokinetic system,with a test speed of 60（°） /s and test times for stretch six times.RESULTS AND CONCLUSION：The relative peak torque of flexor and extensor muscle of hip and shoulder joints in all involved subjects was gradually decreased with the increase of test speed and was gradually increased with the increasing age.Under different test speeds,the relative peak torque of flexor and extensor muscle of hip and shoulder joints was relatively greater in boys than in girls（P〈0.05） ,but there was no significant difference in relative peak torque of flexor and extensor muscle of hip and shoulder joints between boys and girls.