철봉 몸 접어 앞돌며 360° 슈트 기술동작의 운동학적 분석

Abstract

The purpose of this study was to investigate the kinematics of the horizontal bar shoot 360° turn by using 3D motion analysis so as to provide information to increase the effectiveness of training and performance of the shoot movement. The results are as follows; ① The total time for the performance of the shoot was 1.409 ± 0.11s, for P1 0.342 ± 0.01s, P2 0.275 ± 0.01s, P3 0.059 ± 0.01s and P4 0.734 ± 0.09s. The time for the rotation phase was the longest because the gymnast's hand needed to rotate 360°. ② The highest speed and largest range of motion for the center of mass (COM) occurred at the transition phase between the descending and ascending phase. For the ascending phase the anteroposterior and vertical speed was high due to the centripetal force created by the descending phase. For the connection/transition phase the vertical speed was high. At the rotation phase the COM movement was minimized and so the speed was slower then the other phases. ③ The maximum hip flexion during the E2 phase after then during the ascending phase E4 there was a gradual increase hip extension angle. The maximum flexion occurred here to increase the resulting speed which is especially important during the rotation phase. The average maximum hip angular speed was 460.65 ± 46.03°/s. ④ At the start of E4 the average shoulder angle was 21.54 ± 2.60° and at the end of E5 the rotation phase was 336.59 ± 19.15°. It was deemed that during the rotation phase it was important to rotate the shoulder horizontally as quick as possible to ensure a smooth and natural movement. The shoulders angular rotation velocity was 858.40 ± 289.99°/s,and the at S1 this was shown to be 1063.45°/s. To summarize the above results for a successful shoot movement centripetal force must be maximized during the descending phase, and fast hip extension during the ascending phase. At the transition phase fast shoulder angular rotation is needed for the hands to grab the bar for a smooth and natural motion. While teaching the shoot movement the above suggestions should be taken into consideration.