1.Beijing Sport University;2.Sport Science College, Beijing Sport University
目的 探究在较慢跑速下,相较于直道跑,弯道跑时两侧下肢髌股关节压强的变化,并分析长时间弯道跑是否会增加髌股关节痛的可能性。以期为跑步爱好者避免髌股关节痛提供参考意见。方法 本研究选取13名普通男性大学生(无运动专项)以4.0±0.2m/s的速度分别沿直道和弯道(内径为36m)进行跑步测试。采用便携式测速系统(Newtest Powertimer,Finland)监控跑速。应用8镜头红外高速运动捕捉系统(Motion Analysis Raptor-4,USA)采集跑步时三维步态参数,采集频率为200HZ,应用三维测力台(Kistler 9281CA,Switzerland)同步采集地面反作用力及相关指标,采集频率为1000HZ。结果 相较于直道跑,弯道跑外侧腿髌股关节压强、髌股关节压力和髌股关节接触面积显著增加。结论 相较于直道跑,弯道跑时外侧腿髌股关节压强增大,其原因是髌股关节压力的增大。弯道跑髌股关节压力变化时未见膝关节屈曲角度和膝关节伸展力矩的显著变化,提示其力学机制与直道跑不同。本研究结果提示长时间弯道跑会增加外侧腿患髌股关节痛的可能性以及髌股关节痛患者疼痛感加剧的可能性,建议跑步爱好者和髌股关节痛患者尽量避免重复长时间弯道跑。
Purpose The purpose of this study was to explore the differences of the patellofemoral joint stress of lower limbers between linear and curve running. In order to provide recommendations for runners. Methods Using a portable speed measuring system (Newtest, Powertimer, Finland) test the running speed (4±0.2m/s).A three-dimensional motion analysis system (Motion Analysis Raptor-4, USA, 200Hz) and two force plates (Kistler,9281 CA,Switzerland,1000 Hz) was conducted to compare the kinematics and kinetics of lower extremity during the stance phases of linear and curve run (radius: 36m) of thirteen male participants. Results Patellofemoral joint stress、patellofemoral joint force and patellofemoral joint contact area of outside lower were found to increase significantly during curve running. Conclusion Patellofemoral joint stress of outside lower was significantly increased during curve running. The increased patellofemoral joint stress was driven by an increase in joint reaction force. There were no significant difference in knee flexion angles and knee extensor moments when patellofemoral joint stress increased during curve running, It’s suggest that the mechanisms were difference in patellofemoral joint force between curve running and liner running. The results indicate that long distance curve running is a contributing factor with respect to the development of patellofemoral pain and increasing patellofemoral pain. Our findings advice individuals with patellofemoral pain and runners avoid long distance curve running.