小学生膝关节屈伸肌力的等速测试

背景：以往对小学生下肢力量发育的评估,主要局限于立定跳远和纵跳摸高等身体素质的测量,缺乏对其肌肉功能的定量性研究。目的：通过小学生膝关节屈伸肌力发展现状进行测试分析,正确认识小学生关节肌肉力量发育特征。方法：运用＂Kinitech＂等速肌力测试系统对随机抽取石家庄市年龄为9～12岁的54名健康小学生（男25例、女29例）膝关节屈伸肌群进行60,120,240（°）/s三种速度测试。结果与结论：小学生膝关节屈、伸肌群峰力矩均呈现随测试速度增加而下降的现象;男、女生左侧屈肌群在60,120（°）/s时及右侧屈肌群在60（°）/s时,峰力矩低于伸肌群峰力矩（P〈0.01或P〈0.05）。同一测试速度下,在测试速度为240（°）/s时,男生左侧屈、伸肌群及右侧屈肌群峰力矩明显高于女生（P〈0.01或P〈0.05）。

Isokinetic test of flexor and extensor strength in primary student knees

BACKGROUND：Previous evaluation for lower limb strength in primary students are limited for physical quality measurement,such as standing long jump or jump touching,which lack of quantitative studies.OBJECTIVE：To learn the characteristic of development in muscle strength in primary students using isokinetic testing system.METHODS：The flexion and extension strength of knee joints in 54 healthy primary students aged 9-12（25 boys and 29 girls） were measured by using Kinitech Isokinetic testing system with 3 angular velocities：60（°）/s,120（°）/s and 240（°）/s.RESULTS AND CONCLUSION：The peak torque（PT） of primary students was decreased with angular velocities increasing;The PT value of left side at speed of 60（°）/s and 120（°）/s,and right side at speed of speed of 60（°）/s was lower than that of the extensors in both genders（P 0.01 or P 0.05）.At the same speed,the PT value of flexor and extensor in left side and flexor in the right side of boys were obviously higher than that of girls at 240（°）/s（P 0.01 or P 0.05）.