Korean Journal of Applied Biomechanics (한국운동역학회지)

Korean Society of Applied Biomechanics (한국운동역학회)
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The Kinetic Analysis of the Approach and Take-off Motion between Performance in Woman's High Jump

여자 높이뛰기에서 경기력 간 도움닫기와 발구름 동작의 운동역학적 분석

  • Kim, Young-Suk (Department of Physical Education, Graduate School of Kyunghee University) ;
  • Ryu, Jae-Kyun (Department of Coaching, College of Physical Education, Kyunghee University) ;
  • Jang, Jae-Kwan (Department of Golf Management, College of Physical Education, Kyunghee University)
  • 김영숙 (경희대학교 대학원 체육학과) ;
  • 류재균 (경희대학교 체육대학 스포츠지도학과) ;
  • 장재관 (경희대학교 체육대학 골프산업학과)
  • Received : 2015.01.30
  • Accepted : 2015.03.16
  • Published : 2015.03.31
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Abstract

Objective : The purpose of this study was to find some kinetic variable's relationships between personal records and low records in female high jump. Methods : Collected data of the subjects(N=8, ages: $25.5{\pm}1.85$, height: $173{\pm}5.83$, mass: $54.75{\pm}6.36$ personal record: $1.71{\pm}0.04$, low record: $1.62{\pm}0.03$) were used for the last three strides and take-off phase. Five video cameras set in 30frames/s were used for recording. After digitizing motion, the Direct Linear Transformation(DLT) technique was employed to obtain 3-D position coordinates. The kinematic and kinetic factors of distance, velocity, angle, impulse, jerk variables were calculated. A paired t-test was applied for the difference of variables between personal records and lower records and for correlation with performances and variables. The significance level was accepted at p<.05. Results : There was no relationship between pattern of stride and performance. However, rate of change of velocity was related with cental of mass height(CMH) at peak point(PP). Knee, hip, backward lean, foot plant, approach and take off angle showed no difference between best record and low record. Vertical impulse momentum also showed no difference between performances. Conclusion : According to a t-test result, there were significant differences in CMH at PP and jerk at touch down between best record and low record.

Keywords

References

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