Biomechanics analysis of single- and double-leggeddrop jump in Taekwando athletes

• Main Authors: CHOU, Tsung-Han, 周宗翰
• Other Authors: Tsai, Chien-Lu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/95713638319545473032

碩士 === 國立臺灣師範大學 === 體育學系 === 103 === Purpose: Muscle strength of lower extremity is a very important factor in Taekwando competition. The symmetrization, muscle strength, power, and jump ability between dominant and non- dominant leg are the important keys of performance. Therefore, the purpose of this study was to analysis the biomechanics differences between dominant and non- dominant leg during 30-cm height drop jump. Methods: Ten Vicon cameras (250 Hz) and two Kistler force plates were used to collect the kinematic and kinetic data of 8 Taekwando athletics drop jump performance. The Wilcoxon Sign-Rank Test was used to analysis the differences between dominant and non- dominant leg during drop jump (α= .05). Results: In kinematics, the ground contact time, knee angle at the lowest center of mass (COM) position, range of motion (ROM) at the knee joint during the squat period and stretch period, as well as the ROM at the hip joint, COM displacement and jump height during the flight period showed significantly different between dominant and non- dominant leg (p< .05). The ROM at the knee and hip joints and time period during the squat period and stretch period also had significant differences between two groups (p< .05). In kinetics, maximum ground reaction force and the rate of force development had no significant differences between dominant and non- dominant leg. But the impulse showed significantly different between single-leg and two-leg landing. Conclusion: The long term Taekwando training would affect the performance of muscle strength in dominant leg and none-dominant leg. It was suggested that athletes could enhance their training on the none-dominant leg during long term training to improve their attacking skill.