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학위논문 동서

110M 허들동작의 운동역학적 분석

윤양진

부산: 동아대학교 1997. -

vi,115장: 삽도 도판; 26cm. -

학위논문(박사)- 동아대학교 대학원 체육학과 1997년2월

영문초록 : The purpose of this study was to examine the effect of kinematic factors and kinetic factors on high hurdling at record speed. The reflection analysis was utilized to analyze the 110 m hurdle motion from the 1st, the 5th, and the 10th hurdles from take off to landing after photographing the change of joint angle, unit speed, center of gravity, supporting time, the number of steps, a step's width, and the center of body gravity movement, and displacement by using 6 high speed cameras. The direction from the starting point to the end point, before and after, the verticality of ground reaction force, impulse, the maximal ground reaction force, etc were measured with a force platform. Also, for this research, 2 elite athletes and 2 college athletes participated as subjects. The following summarizes the major observations of this analysis: 1. In the section about mean of speed, most of the athletes were a little unstable at the 4th hurdle and at the 5th hurdle, then they recovered after that. Elite athlete A needed take-off conditioning and the other athletes needed speed conditioning for the last part of the race. 2. To optimize horizontal speed the center of gravity has to be high at the start, then it has to be kept as low as possible during flight, and then it has, to be high again to take the impact of landing. 3. For effective hurdling, fast horizontal speed at the take-off should be maintained if possible, the angle of the body when bent low causes the trajectory of flight which effects the center of gravity at the high point of the jump. At landing, the angle of the torso has to be raised up as soon as possible to maintain horizontal speed. 4. For effective hurdling performance, the hip joint's angle should be maintained1 at about 45~55 degrees in the lead leg and at about 169~173 degrees in the hind leg at take off, then about 36~43 degrees in the lead leg and about 77~81 degrees in the hind leg at the high point of the jump, and about 138~155 degrees in the lead leg and about 42~63 degrees in the hind leg at landing. 5. The angle of the knee joint is best if maintained at about 74~83 degrees in the lead leg and about 148~155 degrees at the take-off, about 146~155 degrees in the lead leg and about 48~53 degrees at the top of the jump, and about 154~166 degrees and about 43~48 degrees at landing. 6. The angle of the shin has to have over 17~21 degrees at take-off, over 38~42 degrees at the top of the jump, and over 6~11 degrees when landing to have an ideal stance. 7. It was found that when the angular momentum of the lead leg's hip joint is faster at landing then it will be able to cross the next hurdle more easily. 8. As speed increases, the elite's ground reaction force was increased, but the college athletes' ground reaction force was reduced so it caused a reduction in the front, back, left, right, and vertical forces. 9. The elite athletes have more front and back horizontal ground reaction force than the college athletes so they have more forward thrust. Therefore, acceleration and the speed of take-off increased with impulse. For further study, more comprehensive research using a wider variety of instruments should be done particularly in real situations rather than in experimental sets. Also, E.M.G. analysis is needed for better research.

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