2011 대구세계육상선수권대회 남자 멀리뛰기 경기의 운동학적 분석

The long jump motion of 8 finalist of men`s long jump of IAAF World Championships Daegu 2011 were analysed and the kinematic characteristics of the technique were investigated. The kinematic characteristics of long jump motion of 8 finalist were as follows. In the run-up phase, the average length of 3, 2, and 1 stride were 2.21±0.08 m, 2.46±0.18 m, and 2.19±0.16 m, respectively. The change in the height of the center of gravity was 0.09 ± 0.02 m. The average velocity of 3, 2, and 1 stride was 10.37±0.32 m/s, 9.63±0.32 m/s, and 10.69±10.69 m/s, respectively. In the take-off phase, the horizontal velocity, the vertical velocity, the reduction of horizontal velocity was 9.00±0.37 m/s, 3.04±0.27 m/s, and 1.69±0.34 m/s, respectively. The minimum knee angle and the take off angle was 157±6.57° and 18.5±2.24°, respectively. In the flight phase, the flight time and the maximum height of the center of gravity was 0.82±0.05 s, and 1.70±0.10 m, respectively. In the landing phase, the landing length was 0.51±0.06 m. The body angle, the knee angle, and the hip angle was 71±20.93°, 136±19.19°, and 85±9.58°, respectively. The kinematic characteristics of long jump motion with good record were shown as follows, The reduction of the horizontal velocity in the take-off phase was minimized while the velocity of the run-up were maximally maintained, The vertical velocity in the take-off phase was increased with rapidly extended knee and the high center of gravity.