课题背景：国内、外有关等速肌肉力量的研究，大部分以膝关节的屈、伸肌群为研究对象。等速肌力的变化规律，也多由膝关节屈、伸肌群等速力量测试结果得出。目前可查证的上肢肌力的等速测试研究却屈指可数。

术语解析:等速运动是指运动中，运动速度恒定（等速）而阻力可变，运动中的速度预先在等速仪器上设定，一旦设定，不管受试者用多大的力量，肢体运动的速度都不会超过预先设定的速度，受试者的主观用力只能使肌肉张力增高，力矩输出增加，而不能产生加速度（运动开始和末了的瞬时加速度和减速度除外）的一种运动。

同行评价：文章通过对非特殊人群的肘关节屈伸肌群进行等速肌力测试，获取了一些相应的生物力学指标，可以为运动医学、临床医学、康复医学的实践提供参考。因方法学上的问题，利用肘关节作等动肌力测试的研究较少，这正是本文的创新所在。

摘要
目的:通过测量肘关节屈肌、伸肌群在不同收缩方式、不同运动速度、不同关节角度时力矩的变化情况，以期用肘关节等速测试的力矩指标来评定肘关节及其周围肌群的功能状态。
方法：实验于2006-09在江苏省级机关医院完成。测量了南京体育学院运动系20名男生肘关节屈、伸肌群在等速向心不同运动速度下的肌力参数，向心收缩各测2个不同速度：60(°)/s、120(°)/s。前者每次重复5次，间歇约1 min；后者每次重复10次，间歇约1 min。取最大力矩、最大力矩角度及上述角度的力矩。观察不同速度下屈、伸肌肌峰力矩比较；不同速度下屈伸肌肌峰力矩的相关分析；不同速度下肌峰力矩角度的比较分析；等速向心收缩的加速、放松时间。
结果：①肘关节屈伸肌群等速向心收缩时随着关节给定运动速度的加快，屈肌峰力矩从34.5 N·m减到28.5 N·m，伸肌峰力矩从43.0减到32.7 N·m。②随速度增快，屈肘峰力矩角度增大，伸肘峰力矩角度减小。③当给定运动速度加快时，肘关节屈伸肌的加速时间均随之增长，伸肌的加速时间比屈肌的加速时间短。④前臂与上臂长的比值和伸60(°)/s的峰力矩角度呈负相关。
结论：不同速度下，对于肘关节屈肌群而言，屈伸肌比值、肱二头肌、肱肌、肱桡肌、桡侧腕长伸肌和旋前圆肌的加速时间与肱三头肌、肘肌的放松时间、对于屈肌的肌峰力矩具有重要作用，而肱三头肌、肘肌的加速时间与肱二头肌、肱肌、肱桡肌、桡侧腕长伸肌和旋前圆肌的放松时间对于伸肌的肌峰力矩具有重要作用。
关键词：肘关节；运动；生物力学；组织构建；等速肌力测试

宋雅伟，魏文仪，钱竞光，苏杨，喻欣楠. 肘关节屈伸肌群等速肌力测试与分析[J].中国组织工程研究与临床康复，2008，12(11):2074-2078 [www.zglckf.com/zglckf/ejournal/upfiles/08-11/11k-2074(ps).pdf]

Testing and analysis on the flexor and extensor strength of elbow joint under constant speed

Abstract

AIM：To assess the function condition of elbow joint and its surrounding muscle group through measuring the changes in torque of elbow joint flexor and extensor groups in variable contraction way, velocity of movement, and joint angle.
METHODS: The experiment was performed in September 2006 in the Jiangsu Provincial Institution Hospital. The muscle strength parameters of elbow joint flexor and extensor in 20 male students in the Department of Sports, Nanjing Institute of Physical Education under isokinetic concentric contraction of 60 (°)/s and 120 (°)/s, respectively. The former measurement was performed for 5 times with about 1 minute intermittence, and the latter was performed for 10 times with also 1 minute intermittence. The peak torque, angle of peak torque, and the torque at the angle of peak torque were detected. The peak torques of flexor and extensor at 60 and 120/s were compared to analyze their association. The angles of peak torque at 60 and 120/s were compared, and the acceleration time and relaxation time of isokinetic concentric contraction were also compared.
RESULTS: ①The peak torques of elbow joint flexor and extensor reduced from 34.5 N·m to 28.5 N·m and from 43.0 N·m to 32.7 N·m along with the speeding up of isokinetic concentric contraction. ②With the speeding up, the angle of peak torque of elbow joint flexor group was increased, but decreased in extensor. ③The acceleration time of elbow joint flexor was longer than that of extensor. ④The ratio of forearm length and upper arm length was negatively correlated with the angle of peak torque of extensor at 60/s.
CONCLUSION: Under different velocities, the ratio of peak torque of flexor and extensor, the acceleration time of biceps muscle of arm, brachial muscle, brachioradial muscle, short radial extensor hallucis longus and round pronator muscle, and the relaxation time of triceps muscle of arm and anconeus muscle are important for the peak torque of flexor group. While the acceleration time of triceps muscle of arm and anconeus muscle and the relaxation time of biceps muscle of arm, brachial muscle, brachioradial muscle, short radial extensor hallucis longus and round pronator muscle are important for the peak torque of extensor group.

Song YW, Wei WY, Qian JG, Su Y, Yu XN. Testing and analysis on the flexor and extensor strength of elbow joint under constant speed.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2008;12(11):2074-2078(China)
[www.zglckf.com/zglckf/ejournal/upfiles/08-11/11k-2074(ps).pdf]