Effects of Roundhouse Kick Timing on Biomechanical Characteristics in Taekwondo

• Main Authors: Chang,Wan-Ju, 張婉如
• Other Authors: Chen, Chung-Yu
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/87349859438097426513

碩士 === 國立臺灣體育運動大學 === 體育研究所 === 104 === The purpose of this study was to investigate the effects of counterattack timing on biomechanical characteristics of kicking leg in Taekwondo roundhouse kicks. Sixteen male college Taekwondo athletes were recruited as the participants voluntarily for this study. The mean age, height, body mass, and practice age of the participants were 20.5 ± 0.6 years old, 175.4 ± 4.9 cm, 64.5 ± 6.6 kg, and 10.1 ± 2.6 years, respectively. Each participant was asked to perform the front leg roundhouse kick under the condition of counterattack in active and passive randomly. Eight Vicon infrared digital cameras (MX-F40, 300 Hz) and four Kistler force platforms (9260AA6, 1500 Hz) were synchronized to acquire the kinematical and kinematical data respectively. The Vicon Nexus system (version 1.8.2) was used to calculate the joints angle, angular velocities, joints moment of kick leg. Repeated measures t tests were used to test the statistical differences for biomechanical parameters with the alpha level .05. The result showed that the kick leg takeoff delayed the leg takeoff of attacker 32.5 ± 41.2 ms in the active counterattack, and delayed 130.2 ± 76.0 ms in the passive counterattack due to take a step back. The flexion/extension moments and angular velocity of knee joint in the active counterattack were higher significantly than the passive counterattack. The findings of the study indicated that the Taekwondo athletes had to accelerate positively to execute an active counterattack perfectly. However, because the step back made the distance change between attacker and counterattacker in the condition of passive counterattack, the lower knee moment and angular velocity were the adjustable or controlled strategies to prepare for a counterattack efficiently.