손짚고 뒤돌기의 動作分析 = Analyses of Motions of Back Handspring

다국어 초록 (Multilingual Abstract)

The purpose of this paper is presenting helpful materials for direction and advancing skills by analysing motions of back handspring of the gymnasts who represent the province.
After photographing back handspring motions of four college gymnasts who took part in the 64th National Athletic Meeting in the series of three-step running pace, round off, back handspring, tucked backward somersault with a movie camera (37 frame/sec),
I could get the locus of motions. I compared the motions with ideal motions presented by specialist and get the following conclusion.
1. At the first landing, I found that they landed in a motion leaning forward by about 70°. I think this defect can be corrected through strong snap down practice in round off.
2. At the first landing, they erected their heads in 163°∼197°, and arms came down by 15° from the horizon when landing. I think this is a disadvantage to them in getting speed when the body is bent backward with arm-swing, and this defect can be corrected through the practice of landing with arms attached to ears.
3. At the phase from the first landing to the take-off, when bending the body backward, the head bent backward before swinging the arms. I think this is a disadvantage to them in getting sufficient speed when bending the body backward, and this defect can be corrected through the practice in which arms is attached to the arms intentionally in swinging arms backward.
4. At the phase from the first landing to the take-off, they swung their arms without relaxing the wrist. I think this is a disadvantage to them in bending the body speedily.
5. At the phase from take-off to hand touch, the legs were spread out during the inflight motion. I think this results from the gymnasts' habit of reducing the time which is used in tumbling by shorting their bodies, and this phenomenon happens among trained gymnasts unconsciously, reflectively and frequently.
6. In hand touch, the shoulder line was not cut, which is necessary so that the arms might be vertical against the land. I think this results from not getting sufficient speed in bending the body backward.
7. After the hand touch, the shoulder went forward and legs snaped down a little after the apex. I think this phenomenon happens because the hand off is delayed and the gymnast can't snap down the leg strong.

목차 (Table of Contents)

• Ⅰ. 서론
• Ⅱ. 연구방법
• 1. 연구 대상
• 2. 연구 내용
• 3. 분석 방법
• 4. 연구의 제한점
• Ⅲ. 결과 및 고찰
• 1. 첫 번째 着地부터 발구름 前까지의 국면
• 2. 발구름부터 손짚기까지의 국면
• 3. 손짚기 後부터 두 번째 着地까지의 국면
• Ⅳ. 결론