|目的:探究12周步频控制训练对步态、下肢刚度及髌股关节力学特征的影响。方法:招募 33名青年人随机分为对照组 (n=18)与实验组 (n=15),采用 SimiMotion红外动作捕捉系统、 Kistler三维测力台及 BTS-Gwalk步态分析系统分别采集受试者训练前后跑步时的运动学和动力学数据,利用下肢刚度及髌股关节力学特征对跑步时的运动表现及损伤风险进行量化评定。结果:12周的训练干预后,对照组的步态、下肢刚度及髌股关节力学特征未见显著性差异;实验组的步频显著提高,腿刚度、髋关节刚度显著增加,膝踝关节刚度、髌股关节力和髌股关节应力显著降低。结论:12 周的步频控制训练改变了跑者的自适应步频;腿刚度的增加优化了跑步时下肢能量输出,而膝、踝关节刚度的降低有助于吸收冲击能量,降低骨骼损伤的风险;12周步频控制训练改变了髌股关节的负荷模式,进而降低了跑步时发生髌股疼痛综合征的风险。
|关键词: 步频 步态 刚度 髌股关节应力
|Effects of 12-week Cadence Control Training on Running Gait, Lower Limb Stiffness and Mechanical Characteristics of the Patellofemoral Joint
|MA Gang,CAO Chuanbao,ZHENG Guobing,HE Ruibo,W ANG Daning,PENG Peng
|(Logistics University of Chinese People's Armed Police Force,Tianjin 300309 ,China;Hebei Sport University,Shijiazhuang 050041 ,China)
|Objective: To explore the effects of 12-week cadence control training on gait,lower limb stiffness and mechanical characteristics of the patellofemoral joint.Methods : 33 young people were randomly recruited and divided into control group (n=18) and experimental group (n=15).Simi Motion infrared motion capture system,Kistler 3D force measuring platform and BTS-Gwalk gait analysis system were applied to collect the kinematics and dynamics data of subjects before and after training respectively.Lower limb stiffness and mechanical characteristics of the patellofemoral joint were used to assess performance and injury risk during running.Results: After 12 weeks of training intervention,there was no significant difference in gait,lower limb stiffness and mechanical characteristics of the patellofemoral joint in the control group ； in the experimental group,step cadence was significantly increased,leg stiffness,hip stiffness,knee and ankle stiffness,patellofemoral joint force,and patellofemoral joint stress were significantly decreased.Conclusions: 12 weeks of cadence control training changed runners' adaptive cadence ； increased leg stiffness optimizes lower limb energy output during running,while reduced knee and ankle stiffness help absorb impact energy and reduce the risk of bone damage ； 12-week cadence-controlled training altered the loading pattern of the patellofemoral joint,which in turn reduced the risk of developing patellofemoral pain syndrome during running.
|Key words: cadence gait stiffness patellofemoral joint stress