摘要 目的： 了解膝关节骨关节炎的肌力状态和步行、爬楼梯、坐位立起等功能性行为能力之间的相互关系。方法： 等速测定66个膝关节骨关节炎肢体(33例患者)的肌肉功能，分析其肌力参数和20m步行时间及行为的困难程度与依赖程度之间的相互关系。结果： 20m步行时间和屈伸膝肌力参数呈中等程度负线性相关；伸膝肌力参数多和行为困难程度值有中等程度的负线性相关，180°/s伸膝肌峰力矩值每增加约0.05N*m/kg，行为的困难程度减少1分(功能状态指数)。结论： 膝关节骨关节炎的屈伸膝肌力状态和功能性行为能力有一定的相互关系。从功能角度看，加强膝关节骨关节炎患者的肌力有重要的意义。

Abstract Objective: To study the correlation betweenmuscle strength status and functional performance such as walking, stair climbing andstanding from chair in knee osteoarthritis (OA). Method: The correlationbetween 20m-walking-time, difficulty points and dependency mark of functional performanceand isokinetic parameters of knee extensors and flexors (66 limbs, 33 knee OA patients)were analyzed. Result: 20m-walking-time was negatively and linearlycorrelated with the knee extension and flexion parameters at a moderate degree. Most ofthe knee extension parameters were negatively and linearly correlated with difficultypoints of performance at a moderate degree. There was one point decreasing of difficultypoints at 0.05 Nm/hg peak torque increasing of 180°/s knee extension. Conclusion: The muscle strength status of extensors and flexors of knee OA correlated withfunctional performance to some extent. On the point of function, it is important tostrengthen the muscle in knee OA patients.

Key words Muscle strength; Functional performance; Correlation; Arthrogenous muscle inhibition

从力学角度看 ......