투창 주동작의 역학적 분석 = Biomechanical analysis on the main movement of javelin throw

다국어 초록 (Multilingual Abstract)

The main purpose of this study were to investigate the biomechmical factors during the main movement executed by elite javalin throwers and the correlation between those results and acquired distance. Two male and three female collegiate javelin throwers performing javelin throw were filmed using a high speed vedio camera operating at 60 fps. The ground reaction forces in the lead foot were obtained from an AMTI force platform.
The conclusions were as follows:
1. Average necessary times, from lead foot contact to release moment, ranged from 0.189 to 0.199 sec.
The correlation between the necessary time and acquired distance showed generally negative values.
2. Hipt joint appeared larger than shoulder joint in the linear displacement. The correlation between shoulder displacement and acquired distance was significant.
3. Distal joint had more velocity than proximal joint.
The Correlation between distal joint and acquired distance, distal joint and initial velocity javelin were significant.
Angular velocity of shoulder joint showed larger than that of hip joint in all subjects.
The correlation between angular velocity and acquired distance showed negative value in the hip joint but positive in the showlder joint.
4. Acceleration was large in the elbow and wrist joints but, showed negative value in the shoulder joint.
5. The correlation between release angle and acquired distance showed negative value.
6. The correlation between release height and acquired distance was significant for the most part.
7. The ground reaction force of the vertical average ranged from 1.6 to 1.7 times of their weight in males and 2.0~2.6 times in females. The correlation between ground reaction force and acquired distance was not significant.