태권도 찍어차기 유형에 따른 관절각 및 선속도의 운동학적 분석 (Effects of joint angle and linera velocity on Kinematics of Taekwondo Axe Kick)

서지정보

· 발행기관 : 한국코칭능력개발원
· 수록지 정보 : 코칭능력개발지 / 10권 / 2호 / 47 ~ 57페이지
· 저자명 : 양춘호

초록

다수의 피험자들을 대상으로 찍어차기를 수행함에 있어서 무릎의 자세와 팔의 자세에 따라 찍어차기의 동작이 운동학적으로 어떻게 다른가를 구명하고자 남자 태권도 선수 16명을 연구 대상자로 하여 이지 순간의 관절각, 목표물 가격 순간의 관절각, 목표물 가격 순간의 선속도, 동작 중 최고 선속도와 그 발생시간, 반응기, 스윙기, 가격기, 전체동작의 동작시간를 측정항목으로 선정하였다. 1대의 고속 디지털 카메라에 의해 125Hz 속도로 촬영하고 기록한 자료는 이원변량분석(two-away ANOVA)을 유의성 α=.05로 하여 통계처리 하여 다음과 같은 결론을 얻었다. 태권도 찍어차기 동작에 있어서 운동학적 변인들은 무릎의 자세에 따라서는 변하는 반면, 팔의 자세에 따라서는 유의한 변화가 없었으며, 무릎을 펴 스윙하면 목표물 가격순간 힙의 각속도는 커지고 무릎의 각속도는 작아졌다.

영어초록

The purpose of this study was to investigate effects of both initial arm positions and kicking knee positions on kinematics of taekwondo axe kicks. The axe kicks were divided into four types by two arm positions and two knee positions; kick A was the axe kick with the flexed-arms-up and flexed-knee-swing, Kick B was the one with the flexed-arms-up and extended-knee-swing, Kick C was the one with extended-arms-down and flexed-knee swing, and Kick D was the one with extended-arms-down and extended-knee swing). Sixteen male taekwondo competitors aged 19.4±1.5 were volunteered for this study. Every subject with 5 markers on his right side was asked to perform the four types axe kicks and every kick was filmed at a rate of 125 Hz with a high speed digital camera. Ariel Performance Analysis System was used for analysis of all the images taken. One way and two way ANOVAs were used to identify the significance level between types of kick, and all statistical tests were conducted at the .05 level of significance.
The main results were as follows. First, during taekwondo axe kick, 7 of 8 kinematical variables measured were significantly affected by knee positions but none of them was by arm positions. Second, the foot linear velocity at impact was not significantly affected by any arm and knee positions. Third, the period of reaction phase for flexed-knee-swing kick was taken longer than that for extended-knee-swing kick while the period of striking phase for flexed-knee-swing kick was taken shorter than that for extended-knee-swing kick, so there was no significant difference between the total kicking periods of time for all kicking types

참고자료

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