髌骨软化症患者膝关节等速肌力测试

目的 分析髌骨软化症患者膝关节周围肌力特征，并比较其与健康人的差异。方法 2021年3月，采用等速肌力测试与训练系统，对70例单膝发病髌骨软化症患者(观察组)和35例健康人(对照组)进行膝关节不同角速度(60°/s和180°/s)的屈、伸等速肌力测试。结果 60°/s和180°/s时，观察组患侧屈、伸肌峰力矩、峰力矩体质量比、总功均显著低于对照组(U> 1097.0,P <0.001)；观察组患侧60°/s屈、伸肌和180°/s时伸肌峰力矩、峰力矩体质量比、总功均低于观察组健侧(|Z|> 2.121, P <0.05)。60°/s和180°/s时，观察组患侧屈伸肌力比值均明显大于健侧和对照组(U> 1810.0,|Z|>3.691, P <0.01)。结论 髌骨软化症患者的患膝屈、伸肌肌爆发力和耐力均减弱，膝关节肌力存在失衡现象。

Isokinetic muscle strength of knee for patients with chondromalacia patellae

Objective To analyze the characteristics of the muscle strength around the knee joint of chondromalacia patellae patients, and to explore the difference with normal people.Methods In March, 2021, 70 knee-onset chondromalacia patellae patients (experimental group) and 35 normal people (control group) were measured isokinetic muscle strength of flexion and extension of knee in angular velocities of 60°/s and 180°/s.Results At 60°/s and 180°/s, the peak torque, the peak torque-to-weight ratio and the total work of the flexor and extensor muscles on the affected side in the experimental group were lower than that of the control group (U > 1097.0, P<0.001). The peak torque, the peak torque-to-weight ratio and the total work of the flexor and extensor muscles at 60°/s and extensor muscles at 180°/s were lower on the affected side than on the healthy side in the experimental group (|Z| > 2.121, P<0.05). The peak torque ratios at 60°/s and 180°/s were more in the affected knees than in the healthy knees of experimental group and in the control group (U > 1810.0, |Z| >3.691, P<0.01).Conclusion The explosive force and endurance of the knee flexor and extensor has weakened in patients with chondromalacia patellae, and there is imbalance in knee joint muscle strength.