태권도 숙련자와 미숙련자의 공격뒤차기 동작에 대한 운동학적 분석

Abstract

The purpose of this study was to analyze kinematic variables during turing back kick motion of Taekwondo. The subjects of this study were the 4 skilled and 4 unskilled of male university player in respectively. The experiment of this study was used two 16mm high speed cameras and its speed 125 frames/s. Analysis of this data was three dimensional cinematography using KWON3D program package. The results were as following; 1. In the elapsed time, there was no significance difference statically between a skilled and unskilled group. But skilled group was more fast during the motion of I phase. And unskilled group was more fast during the motion of II phase so called force production section, which had an influence on Diechagi's velocity. 2. In the center of gravity of human body, the changing of it was <TEX>$1.10{\pm}0.04m$</TEX>, <TEX>$1.12{\pm}0.03m$</TEX> of LFM(left foot movement) and <TEX>$1.36{\pm}0.08m$</TEX>, <TEX>$1.39{\pm}0.09m$</TEX> of RKF(right knee flection), and <TEX>$1.44{\pm}0.08m$</TEX>, <TEX>$1.42{\pm}0.09m$</TEX> of RFI(right foot impact). There was no significance difference statically between the two groups. 3. The velocity of heel on impact was 1.13m/s in the skilled group and 1.23m/s in the unskilled group, when each angle of knee was <TEX>$110.4{\pm}10.9deg/s$</TEX>, <TEX>$114.8{\pm}28.4deg/s$</TEX>. The maximum velocity of each performance was reached before the RKF, and the velocity and angle at impact along by two groups did not show any significant difference statically. 4. In the angular velocity of just RKF of lower leg, there was significance difference statically between the two groups(p<.05).