창던지기 투사동작의 운동학적 분석
Kinematical analysis of the javelin throwing motion
창술 창던지기 투사동작;
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The purpose of the study was to help the athletes' exercise and contribute to the performance through the analysis athletes' movement in javelin. To accomplish the objective of this study, four females in the javelin were selected and the direct linear transformation(DLT) method was employed to compute the three-dimensional coordinates the digitized body points. Based on the results of this study, the following conclusions were drawn. It was appear that the projection velocity was 17.03±2.36m/s, projection angle was 37.58±0.85deg., projection high was 90.2±0.03%. The execution time of the phase 2 was longer than the phase 1 and then the phase 2 was effected to the whole phase. The center of gravity was moved to the forward at the same time, lower than start point in the phase 1 and the center of gravity in the phase 2 was higher than in the phase 1. It was appear that the velocity of center of gravity was most higher in the event 2 and lose in the event 3. The velocity of upperarm was increase and then decrease in the throwing phase, and the velocity of forearm was all the way increase, and the velocity of hand was distinct increase in the whole phase. The angle of trunk was flexed in the throwing phase and also the twist angle of trunk to the Y axis was flexed. Hip joint angle and knee joint angle was extend in the throwing phase.