A Kinematical Analysis of the Shotput Rotational and Gliding Technique
彭賢德(Hsien-Te Peng)；黃長福(Chen-Fu Huang)；彭賢勝(Hsien-Sen Peng)
鉛球 ； 3D攝影分析 ； shot put ； 3D analysis
|Volume or Term/Year and Month of Publication||
6卷2期（2004 / 06 / 01）
139 - 150
Purpose: The purpose of this study was to analyze and compare the shot put rotational technique with the conventional gliding technique, and to find the difference between them. Methods: Three-dimensional analysis method was used. Two Redlake high-speed digital cameras (125Hz) were gen-locked to record the three-dimensional shot put motions. The images were digitized by Kwon 3D motion analysis system. Consequences and Discussion: The shot velocities of the gliding technique were higher than the rotational technique in the beginning and the delivery phase, but were lower than the rotational technique in the thrusting phase. The rotational technaique had more body angular momentum than the gliding technique. The positions of the shot and the body center of mass of the rotational technique were higher than the gliding technique. The moving length of the shot of the rotational technique was higher than the gliding technique. Conclusion and Suggestions: We suggest shot-putters who want to practice the rotational shot put technique should enhance the body rotation stability in the beginning. Then concentrate on the rotating of each segment increasing the angular momentum of the body. They can increase the release velocity to improve the performance using the biomechanical edge of rotation.