等速限弧运动对膝关节炎功能影响

目的　探讨股四头肌限弧等速运动角度对膝骨性关节炎患者的疗效。 方法　共78例右膝骨性关节炎患者纳入研究，按随机法赋值从大到小分成3组，每组26例。3组除常规运动训练外，进行不同角度的限弧等速运动训练。训练弧度分别为：A组膝屈90°→10°，B组膝屈60°→10°，C组膝屈30°→10°。每周3 次, 训练 8 周。在治疗前后分别采用疼痛视觉模拟评分法（VAS）评估疼痛改善程度，采用美国特种外科医院（HSS）指数评定膝关节功能情况，同时等速训练仪测定患膝峰力矩（peak torque，PT）、本体感觉误差均值。 结果　3组疼痛、HSS指数、PT较治疗前差异有显著性意义（P <0.05），A组优于B组、C组（P <0.05）；治疗后各组本体感觉较治疗前略有改善，但3组改善程度无统计学差异（P> 0.05）。 结论　不同弧度等速运动可以改善膝关节功能，较大弧度的限弧等速运动获益更明显。

Impact of qualified arc angle isokinetic training on the function of knee osteoarthritis

Objective　To evaluate the effect of qualified arc angle isokinetic training on the function of Knee osteoarthritis. 　Methods　78 participants with right knee osteoarthritis were divided randomly into group A, group B, and group C. There were 26 cases in each group. Aside from regular exercise therapy, patients in all groups also accepted isokinetic training. Patients in group A accepted isokinetic exercise knee of extension training with 90 ° to 10 °; Patients in group B accepted knee extension isokinetic exercise training with 60 ° to 10 °; patients in group C accepted knee extension isokinetic exercise training with 30 ° to 10 °. All groups were trained 3 times per week, and the training lasted for 8 weeks in total. American hospital for special surgery index（HSS）, maximum peak torque (PT), visual analogue scale method (VAS), and joint motion detection threshold (JMDT) were assessed before and after the treatments in 3 groups. Results There was significant difference in the PT, HSS, and VAS compared to the prior treatment (P<0.05), Group A improved significantly than Group B and Group C. JMDT turned better than before but there was no significant difference (P>0.05).　Conclusion　Different qualified arc angle isokinetic training can make an improvement on knee function. Larger arc angle isokinetic training can help knee function evidently.