1.Nanjing Sport Institute;2.Beijing Sport University;3.The University of North Carolina at Chapel Hill
目的 本研究通过对比不同性别髌股关节痛和无损伤业余跑者跑步时的下肢运动学、动力学和表面肌电数据，确定髌股关节痛业余跑者性别特异的下肢生物力学特征。方法 选取15名男性和10名女性髌股关节痛业余跑者作为实验组，并匹配25名无损伤业余跑者作为对照组。采集所有受试者跑步时的下肢运动学、动力学和表面肌电数据。采用双因素方差分析确定组别与性别对跑步下肢生物力学特征的影响。结果 男性髌股关节痛业余跑者跑步缓冲期最大膝屈角度显著大于对照组；男性和女性髌股关节痛业余跑者跑步缓冲期最大髋内收角度显著大于对照组，且女性显著大于男性。结论 不同性别的髌股关节痛业余跑者在跑步时表现出不同的下肢生物力学特征，因此髌股关节痛的临床治疗应具有性别特异性。
Objective The aim of this study was to determine the sex differences in lower extremity biomechanics of amateur runners with patellofemoral pain (PFP) and without PFP. Lower extremity kinematic, kinetic, and electromyographic data in running were compared between male and female amateur runners with and without PFP. Methods 15 male and 10 female amateur runners with PFP were identified and enrolled in the PFP group, 25 healthy amateur runners matched with the PFP group were recruited as the control group. Three-dimensional kinematics and kinetics, as well as electromyographic data in the running task, were collected. A 2 × 2 analysis of variance was performed to compare for each lower extremity biomechanics between groups and between sexes. Results Male participants with PFP showed a greater peak knee flexion angle during the landing phase of running when compared to the control group. Participants with PFP showed a greater peak hip adduction angle during the landing phase of running when compared to the control group for both males and females, while the peak hip adduction angle of female participants was significantly greater than that of male participants. Conclusion Amateur runners with PFP showed sex-specific lower extremity biomechanics in the running task, the clinical intervention for PFP, therefore, should be sex-specific.