等动肌力测试10岁健康儿童肩关节屈伸肌群的发育特征

Developmental characteristics of flexion and extension muscles of the shoulder joint in 10-year-old children by using isokinetic test

背景:肩关节是人体最灵活的关节,目前对儿童肩关节肌群发育特征的研究非常少见。目的:通过等动肌力测试分析10岁儿童肩关节屈伸肌群力量的发育特征。方法:运用Kinitech等动测力系统对59名10岁儿童双侧肩关节屈伸肌进行60,120(°)/s两种速度测试。结果与结论:①同一测试速度下同侧同名肌群男女比较,左右肩关节屈伸峰力矩、最大功率值差异均无显著性意义(P>0.05)。②左肩关节:男性屈肌在120(°)/s速度下的相对体质量峰力矩值高于女性(P<0.05),伸肌在60,120(°)/s速度下数值高于女性(P<0.01或P<0.05);男性屈肌在60(°)/s速度下的相对体质量最大功率值高于女性(P<0.05),伸肌在60,120(°)/s测试速度下的相对体质量最大功率值高于女性(P<0.05或P<0.01)。③右肩关节:男性伸肌在60,120(°)/s速度下的相对体质量峰力矩值高于女性(P<0.05);男女屈肌在60,120(°)/s速度下的相对体质量最大功率值差异均无显著性意义(P>0.05),男性伸肌在60,120(°)/s速度下的相对体质量最大功率值高于女性(P<0.01或P<0.05)。说明10岁儿童男女相比,肩关节屈伸肌群发育无明显差异;自身相比,男女儿童肩关节伸的肌群力量要好于屈肌群,屈伸比在合理范围之内。

BACKGROUND： The shoulder joint is the most flexible joint, but there are rare studies for the developmenta characteristics of children shoulder joint muscle. OBJECTIVE： To analyze the development characteristics of flexor and extensor strength of the shoulder joint in 10-year-old children by using isokinetic test. METHODS： Totally 59 10-year-old children＇s flexor and extensor muscle of bilateral shoulder joints at 60 and 120 （~）/s speeds were tested by Kinitech isokinetic measuring system. RESULTS AND CONCLUSION： The comparison of homonymous muscle between male and female at the same speed showed that the peak torque （PT） and maximum power rating （MT） of extensor and flexor muscle between left and right shoulders had no significant difference （P 〉 0.05）. On the left shoulder joint, male PT/body mass （BW） was higher than female＇s at 120 （°）/s speed （P 〈 0.05）; male extensor value was higher than female＇s at the speed of 60 （°）Is and 120 （°）/s （P 〈 0.01 or P 〈 0.05）. The maximum power （MP）/13W of male flexor was higher than that of female at 6 （°）/s speed （P 〈 0.05）, while the MP/BW of male extensor was higher than that of female at the speed of 60 （°）/s and 120 （°）/s （P 〈 0.05 or P 〈 0.01 ）. On the right shoulder joint, PT/BW of male extensor was higher than that of female at the speed of 60°/s and 120 （°）/s （P 〈 0.05）; MP/BW at the speed of 60 （°）Is and 120 （°）/s had no significant difference between male and female flexor （P 〉 0.05）. MP/BW of male extensor was higher than that of female at the speed of 60 （°）/s and 120 （°）Is （P 〈 0.01 or P 〈 0.05）. These findings suggest that in terms of 10-year-old children, different genders had no influence in the development of flexors and extensors of shoulder joints; in the same person, the extensor muscle strength is better than the flexor muscle and the ratio of flexor and extensor is in a reasonable range.