[[alternative]]The Kinematics Analysis of Taekwondo Spin-whip kick

[[abstract]]Taekwondo is the official event of the Olympic game. In order to attract the spectator the rule was modified to emphasize gaining point by application of the jumping, turning and attack the opponent face and upper body. The Spin-whip kick is described as the turn and attack the opponent face in order to gain point. The purpose of this study was to analyze the kinematics of Spin-whip kick, and to identify important parameters of Spin-whip kick, in order to provide useful information for the athletes and coaches. Two peak high speed cameras were gen-locked to videotape the kicking motion. Eight excellence level taekwondo athletes served as subjects, and their training experience and taekwondo Dan were 11.7±2.7years, 3.4±0.7Dan. The summary of results were listed as following: 1. For the Spin-Whip kick motion time, reacting time took 38%, attack time (25%), recover time (37%)respectively. 2. The shoulder was abducted and elbow extended during the kicking foot toe off the ground to help for turning the body, the shoulder was adducted after the foot left ground to reduce the moment of inertia during the body turn, and the elbow extended at the attack target to defense and balance the body. 3. All subjects have two peak knee angles of kicking leg between toes off and contact the target, extension of the knee after toe off and flexion of the knee before second extension for the target. 4. The ankle was under dorsiflexion and plartarflexion when contacted the target. The greater peak ankle angle occured at contact have better attacking effectiveness 5. All peak joints linear velocities were occured before contact the target with hip(3.3±0.46m/s),knee(6.1±0.6m/s)and ankle(8.98±0.85m/s), respectively. 6. In this study, not all the subjects followed the principle of kinetic chain , however the subject with kinetic chain of kicking have a fast kicking velocities.