2011 대구세계육상선수권대회 남자 멀리뛰기 경기의 운동학적 분석

Abstract

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 <TEX>$2.21{\pm}0.08$</TEX> m, <TEX>$2.46{\pm}0.18$</TEX> m, and <TEX>$2.19{\pm}0.16$</TEX> m, respectively. The change in the height of the center of gravity was <TEX>$0.09{\pm}0.02$</TEX> m. The average velocity of 3, 2, and 1 stride was <TEX>$10.37{\pm}0.32$</TEX> m/s, <TEX>$9.63{\pm}0.32$</TEX> m/s, and <TEX>$10.69{\pm}10.69$</TEX> m/s, respectively. In the take-off phase, the horizontal velocity, the vertical velocity, the reduction of horizontal velocity was <TEX>$9.00{\pm}0.37$</TEX> m/s, <TEX>$3.04{\pm}0.27$</TEX> m/s, and <TEX>$1.69{\pm}0.34$</TEX> m/s, respectively. The minimum knee angle and the take off angle was <TEX>$157{\pm}6.57^{\circ}$</TEX> and <TEX>$18.5{\pm}2.24^{\circ}$</TEX>, respectively. In the flight phase, the flight time and the maximum height of the center of gravity was <TEX>$0.82{\pm}0.05$</TEX> s, and <TEX>$1.70{\pm}0.10$</TEX> m, respectively. In the landing phase, the landing length was <TEX>$0.51{\pm}0.06$</TEX> m. The body angle, the knee angle, and the hip angle was <TEX>$71{\pm}20.93^{\circ}$</TEX>, <TEX>$136{\pm}19.19^{\circ}$</TEX>, and <TEX>$85{\pm}9.58^{\circ}$</TEX>, 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.