Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Kinematic Characteristics of the Thrower's COM and the Shot in Shot Put : The Woman Record Holder of Korea

포환던지기 동작 시 포환과 신체 무게중심의 운동학적 특성 : 한국 여자 기록보유자를 대상으로

  • Lee, Dong-Jin (Department of Physical Education, ChungNam National University) ;
  • Cho, Byung-Jun (Department of Emergency Medical Service, Kangwon National University) ;
  • Lee, Myung-Sun (Department of Physical Education, ChungNam National University)
  • 이동진 (충남대학교 체육교육과) ;
  • 조병준 (강원대학교 응급구조학과) ;
  • 이명선 (충남대학교 체육교육과)
  • Received : 2012.07.30
  • Accepted : 2012.11.08
  • Published : 2012.11.30
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Abstract

The purpose of this study was to analyze the kinematic characteristics of the thrower's center of mass (COM) and the shot that her performance hits record high for the 29th National Athletic Competition. Two S-VHS video cameras were used to visualize. The Direct Linear Transformation technique was employed to paint a clear picture in the three dimensional coordination. Kwon3D was used to analyze the data. The results showed that release velocity and height were 13.73 m/s and 198.6 cm(119% by height ratio), respectively, which is considered as peak performance comparing an extensive review of previous literature on the shot put. Release angle was $34^{\circ}$, which is lower than the previous studies. The path of thrower's center of mass is needed to travel in a release direction during the flight phase. The vertical movement of the thrower's center of mass during the driving should be controlled. At release, the perfact timing is required without vertical and horizontal movements of the thrower's center of mass.

본 논문은 포환던지기 여자 기록보유자의 실제 경기에서 포환과 신체 무게중심의 운동학적 특성을 분석하는데 있다. 이를 위해 2대의 비디오카메라를 이용하여 촬영 한 후, 3차원 영상분석을 위해 DLT 방법을 이용하였으며, 자료 분석을 위해 Kwon3D 프로그램을 이용하였다. 그 결과는 다음과 같다. 첫째, 포환의 투사 속도와 투사 높이는 각각 13.73 m/s, 198.6 cm(신장비 119%)로 선행연구들과 비교했을 때, 최적의 수행을 한 것으로 판단되나 투사 각도는 $34^{\circ}$로 다소 작게 나타났다. 둘째, 신체 무게중심의 이동은 글라이드 구간에서 투사 방향으로의 이동이 필요하며, 딜리버리 구간에서 신체 무게중심의 상하 이동을 제어해야 한다. 셋째, 릴리즈 순간 신체 무게중심의 좌우방향과 상하방향의 흔들림 없이 정확한 타이밍에 포환이 투사되어야 한다.

Keywords

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