骨关节炎性肌力减弱训练效果可能有选择性

目的观察肌力训练减轻膝关节骨关节炎肌肉抑制的效果,探讨存在肌群抑制的情况下选择性同等肌力训练可否产生不同的效果。方法18例膝骨关节炎患者(26膝)进行3～6周每周3次的肌力训练,伸膝肌和屈膝肌训练程度同等。前后测定60°/s、120°/s和180°/s等速运动的峰力矩、单次最佳做功和力矩加速能。结果屈膝肌参数包括60°/s的单次最佳做功、120°/s的峰力矩和力矩加速能及180°/s的峰力矩和力矩加速能,均较伸膝肌有显著增加。结论膝骨关节炎的伸膝肌和屈膝肌训练效果不同,屈膝肌力改善程度好于伸膝肌。

Muscle weakness of knee osteoarthritis: the exercise effects may be selective

Aim Muscle strength exercise can reduce the muscle inhibition of knee osteoarthritis (OA). The selective inhibition of knee extensors and flexors exists at spinal level so that doing extensors and flexors exercise equally should have unequal effects. The study tried to analyze whether the selection exists. Methods 18 knee OA patients (26 involved limbs) had taken part in a muscle exercise procedure for 3- 6 weeks (3 times per week), which had an equal intensity between knee extensors and flexors. The peak torque (PT), best work repetition (BWR) and torque acceleration energy (TAE) were tested at 60° /s, 120° /s and 180° /s before and after the exercise. Results The improving extents of flexors parameters such as BWR at 60° /s, PT and TAE at 120° /s, PT and TAE at 180° /s were better than those of extensors significantly. Conclusion Muscle selection of the exercise effects was shown in knee OA patients that knee flexors strength were improved more significantly than extensors strength. For a matter of fact that knee extensors play a more important role than flexors, we should pay much more attention on knee extensors exercise.