抄録
A front-court forehand lift of badminton is known that the sports injuries occur frequently for applying the high load to the lower-extremity joint. In order to prevent the lower-extremity joint injury caused by the high load, the purpose of this study was to analyze the kinetic effect on the lunge landing leg during front-court forehand lift. Subject was eight male high school badminton players. The three-dimensional angle of the lower-extremity joint, ground reaction force and center of pressure (COP) on the lunge landing sole were obtained from the motion capture of the front-court forehand lift. As kinetic parameter of the lunge landing leg, the joint reaction force and joint moment were estimated by using the inverse dynamics technique. Lunge landing time was average 0.524s. During the lunge landing time, so as to decelerate the whole body which reached the maximum velocity and to achieve the proper racket swing, the stability of the lunge landing leg was maintained by the hip- and knee-flexion moments, hip adduction moment and knee varus moment. The large anterior shear force was affected on the knee joint, and therefore the muscular strength training around the knee joint was essential to prevent the knee-joint injury. Because the COP was located on lateral compartment of the lunge landing sole, the grip performance on lateral compartment of the badminton shoes was important to maintain the whole-body stability during the front-court forehand lift.
