Biomechanical Analysis of Back Handspring Connection Tuck and Straight Double Backward Somersault

• Main Authors: Wang Chien-Bang, 王建邦
• Other Authors: Hong Der-Ming
• Format: Others
• Language: zh-TW
• Online Access: http://ndltd.ncl.edu.tw/handle/19575469933261334639

碩士 === 國立體育學院 === 運動科學研究所 === 81 === The purpose of this study was to find out (1)the difference of kinematic data and angular momentum between back handspring connecting tuck (TDB) and straight(SDB) double backward somersault in selected positions and phases; and (2) the conditions of performing the SDB and tuck three backward somersault (TTB) by the native gymnasts who had performed TDB. Three cameras with a speed of 60 frames per second were used to film all performance during floor exercise competition in two games. The films of six TDB and six SDB selected from these games were digitized by using two dimmensional model of Peak Performance System and multi-linked rigid body model with 7 segments and 8 points, then the kinematic data and angular momentum were obtained by previous process for t-test statistical analysis. Conclusions of this study were made as follows: (1)SDB had higher horizental velocity than TDB at the phase of back handspring in order to get higher takeoff horizontal velocity at the phase of backward somersault; (2)SDB had lower CG height, a takeoff angle of approaching 90 ° and higher takeoff horizontal velocity than TDB at the takeoff phase in order to get larger angular momentum; (3)It is possible to perform the SDB by the five native gymnasts who had performed TDB if they decrease the loss of angular momentum and increase the takeoff horizontal velocity and projectile angle at the phase of takeoff; and (4)The predicted velocity (6.25 m/s) of this study to accomplish TTB was much higher than the velocity(4.75 m/ s) that the five native gymnasts performed TDB obtained, so it is difficult for them to accomplish TTB.