Faculty of Sports Science, Ningbo University, Ningbo 315211, China.
Department of Sport and Physical Education, Hong Kong Baptist University, Hong Kong, China.
Sensors (Basel). 2024 Oct 4;24(19):6427. doi: 10.3390/s24196427.
Patellofemoral pain syndrome (PFPS) is one of the most common causes of anterior knee pain encountered in the outpatient setting. The purpose of this study was to compare the lower limb biomechanical differences during anticipated and unanticipated side-cutting in athletes with PFPS.
Fifteen male basketball players diagnosed with PFPS were enrolled in the study. Participants executed both anticipated and unanticipated 45-degree side-cutting tasks. Motion analysis systems, force plates, and electromyography (EMG) were used to assess the lower limb joint angles, joint moments, joint stiffness, and patellofemoral joint contact forces. Analyzed biomechanical data were used to compare the differences between the two circumstances.
Unanticipated side-cutting resulted in significantly increased ankle plantarflexion and dorsiflexion angles, knee abduction and internal rotation angles, and hip abduction angles, as well as heightened knee adduction moments. Additionally, patellofemoral joint contact forces and stress increased, while contact area decreased during unanticipated tasks.
Unanticipated movement raises the demands for joint stability and neuromuscular control, increasing injury risks in athletes with PFPS. These findings have practical implications for developing targeted rehabilitation programs and injury prevention strategies.
髌股关节疼痛综合征（PFPS）是门诊中最常见的前膝痛原因之一。本研究旨在比较 PFPS 运动员在预期和非预期侧移时下肢生物力学的差异。
15 名男性篮球运动员被诊断为 PFPS 患者入组本研究。参与者执行预期和非预期 45 度侧移任务。运动分析系统、测力板和肌电图（EMG）用于评估下肢关节角度、关节力矩、关节刚度和髌股关节接触力。分析的生物力学数据用于比较两种情况下的差异。
非预期侧移导致踝关节跖屈和背屈角度、膝关节外展和内旋角度以及髋关节外展角度显著增加，同时还增加了膝内收力矩。此外，在非预期任务中，髌股关节接触力和压力增加，而接触面积减小。
非预期运动增加了关节稳定性和神经肌肉控制的需求，增加了 PFPS 运动员受伤的风险。这些发现对于制定有针对性的康复计划和损伤预防策略具有实际意义。
