羽毛球运动员踝关节生物力学特征对机械不稳的影响研究

o analyze the influence of the biomechanical characteristics of the ankle from the moment oflanding to the end of the buffer on mechanical instability in the take-off of badminton players so as to pro-vide theoretical support for avoiding sports-related injury for beginners. Biomechanical parameters of the ankle joint were obtained synchronously by QUALISYS-MCU 500 optical motion capture system made in Swe-den and Kistler three-dimensional dynamometer.Results :Kinematics:The ankle metatarsal flexion anddorsiflexion angles of beginners were significantly lower than those of high-level athletes (P <0.05 ) , but thevarus and internal torsion in beginners were significantly greater than those of the latter (P0.05 ).Dynamics :Thevalgus moment and external rotation moment of beginners were significantly larger than those of the controlgroup (P<0.05 ) , and the internal rotation moment of beginners was significantly lower than that of high-level athletes (P 0.05). Compared with high-level athletes , beginners show excessive ankle vanus ,relativelimitation of dorsal flexion when landing,and stress instability , which may make them more prone to sportsinjury. It is suggested that attention should be paid to the training of calf fibula muscle group and strength-en the special exercise of the lateral ligament of the ankle joint in order to control the movement of thefrontal surface of the ankle joint so as to prevent mechanical state of sports injury of the ankle joint. Jointprotection and rehabilitation training should be strengthened to adapt to later high-intensity training andcompetition.