주니어 역도 선수 인상 종목의 Dead-lift 동작 시스탠스유형에 따른 운동학적 변인 비교분석 (The Comparative Analysis on the Kinematic Variables according to the Types ofStance in the Dead-lift of Snatch Events of Junior Weight Lifters)

서지정보

· 발행기관 : 한국운동역학회
· 수록지 정보 : 한국운동역학회지 / 18권 / 4호 / 99 ~ 107페이지
· 저자명 : 정남주, 김재필

초록

본 연구는 주니어 역도 선수 인상 종목의 주요 국면인 Deadlift 동작 시 스탠스 유형에 따른 운동학적 변인을 비교․분석하여 선수들의 경기력 향상과 훈련 시 기초자료를 제공하기 위하여 실시하였다. 본 연구에서 8자형은 11자형에 비해 바벨과 신체의 발란스에 적합한 소요시간을 보였고 바벨을 끌어올리는데 요구되는 인체중심의 전․후, 좌․우이동범위를 작게하여 인체의 안정성을 유도하였다. 또한 8자형의 인체중심속도와 바벨의 속도는 E3(바가 고관절에 도달할 때)를 지나면서 상방향으로 바를 끌어올리는데 유리한 조건의 큰 속도를 발휘하는 것으로 나타났다. 그리고 몸통과 고관절, 무릎, 발목 및 스탠스 각도에서 8자형은 11자형에 비해 인체의 안정성을 유지하면서 순간적인 힘을 발휘하는데 유리한 조건을 갖추고 있는 것으로 나타났다.

영어초록

N. J. Chung, and J. P. Kim, The Comparative Analysis on the Kinematic Variables according to the Types of Stance in the Dead-lift of Snatch Events of Junior Weight Lifters. Korean Journal of Sport Biomechanics, Vol. 18, No. 4, pp. 99-107, 2008. The aim of this study was to provide fundamental data in training to improve athletes' competitiveness through the comparative analysis of kinematic variables according to the types of stance. For this study, the subjects selected 4 Junior Weight Lifters. Subjects performed two types(8-type and 11-type) Dead-lift and their performance was sampled at 60frame/sec. using four high-speed digital video cameras. After digitizing images from four cameras, the two-dimensional coordinates were used to produce three-dimensional coordinates of the 15 body segments(20 joint makers and 2 bar makers). And the results were as follows. 1. As for the time required for stances, 8-type motion was faster than 11-type motion. 2. As for the body-center shift in stances, 8-type motion was bigger than 11-type motion in back and forth motion shift, and 11-type motion was bigger than 8-type motion in right and left, up and down motion shift. 3. As for the speed of a body-center and a babel, 8-type motion was faster than 11-type motion. 4. As for the motion-trace of a babel in stances, 8-type motion was bigger than 11-type in back and forth, right and left motion and 11-type motion was bigger than 8-type in up and down motion. 5. As for the body-angles in stances, 8-type motion was bigger than 11-type in the stance angle, and 11-type motion is bigger than 8-type in the angles of a coxa, a knee and an ankle. As a result of the comparative analysis between 8-type and 11-type stance of Junior Weight Lifters dead-lift, both were generally similar in variables, but 8-type motion was more stable than 11-type in aspects of time, speed, center shift, angle change.

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