Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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The Kinematic Characteristics of Javelin in Korean Male Javelin Throwers Following Rank

한국 남자 창던지기 선수들의 순위별 창의 운동학적 특성

  • Kim, Tae-Sam (Sports Science Institute, Korea National Sport University) ;
  • Ryu, Ji-Seon (Sport & Health Management Major, School of Sport Health & Welfare, Korea National Sport University) ;
  • Park, Jae-Myoung (Motion Innovation Center, Korea National Sport University)
  • 김태삼 (한국체육대학교 체육과학연구소) ;
  • 류지선 (한국체육대학교 스포츠건강복지학부 스포츠건강관리) ;
  • 박재명 (한국체육대학교 모션이노베이션센터)
  • Received : 2013.03.27
  • Accepted : 2013.06.04
  • Published : 2013.06.30
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Abstract

The purpose of this study was to analyze the kinematic characteristics of javelin to compare the characteristics between world elite athletes and local male athletes. The subjects selected 9 athletes out of total 13 athletes recorded more than 65 m in the preliminary and main competition participated in the 93rd National Sports Festival held in 2012. Three-Dimensional motion analysis using a system of 4 video cameras(Sony HXR-MC2000) at a sampling frequency of 60 fields/s was performed for this study. The Kwon3D 3.1 was used to obtain the three dimensional coordinates about the top, grip, end of javelin. And the kinematic factors of javelin calculated using Matlab2009a program. The resultant speed of javelin that affects directly to the record of performance showed 26.08 m/s indicated lower speed of about 2-3 m/s than world elite athletes. The release point appeared to have been made at the high of $1.79{\pm}0.07$ m of 99.8% of the height of the athletes. In terms of release angle, it was indicated average $33.0{\pm}3.81^{\circ}$ lower release angle compared to the world elite athletes. The attitude angle(up & down tilt angle, X axis) related to javelin indicated average $38.5{\pm}4.96^{\circ}$, its related attack angle average $5.5{\pm}5.11^{\circ}$, and yaw angle(sideslip, side attack angle) average $15.7{\pm}8.48^{\circ}$.

Keywords

References

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