Kinematic Analysis Of Badminton Back Court Smashing Technique Of Outstanding University Student Players

Back court smash is the most frequently used technique in badminton matches. Our research on back court smashing technique from kinematics prospect is based on historical documents, expertise and infrared high-speed testing technique, and is expected to provide practical guidance on badminton teaching, training and competition.Based on body movement, back court smash is further divided into standing smash and jumping smash, the difference between them is that jumping smash includes one additional jumping movement, this so-called jumping movement is sequentially composed of jumping, airing and grounding.1. During both standing smashing and jumping smashing, all parts of the racket arm are accelerated, with the arm speed increasing sequentially and monotonously from the part closer to the body to the partfurther away from the body, and then decelerated. With the force transmitted by hand, the racket is accelerated to its maximum speed right before its impact with the shuttle.2. The most prominent difference between standing smash and jumping smash is the torsion angle of player' s body and the way of the movement of player' s legs. In a standing smash, the main purpose of player' s leg extension is to let her hip joint gain a forward and upward speed. But in a jumping smash, the main purpose of player' s leg extension is to let herself raise up in the air to acquire higher point of impact between her racket and the shuttle.3. We use the speed of racket movement to kinematically evaluate the effectiveness of a smashing technique and find that the impact speed of racket movement of a jumping smash is higher than that of a standing smash, but not significantly.