Kinematics Analysis On The Laster Strides Of Approach And Take-Off Technique Of High Jumper-Huang Haiqiang

High jump was once an advantage event of track and field in our country. There The world record hade been broken 5 times by 3 high jumper adopting different pole technique. Zheng fengrong , our country famous high jumper of women, broke the world record of 1.77m in 1957. In 1970, Ni zhiqin , our country famous high jumper of man, used straddle technique to jump 2.29m and broke the world record. In 1983- 1984, Zhu jianhua used fosbury flop technique to jump 2.37m ,2.38m,2.39m, broke the world records three times. With Zhu jianhua and other old athlete out of commission, man high jump in our country entered the valley. So it was an important project that restore the prestige of man high jump in our country.The take-off technique of high jumper -Huang haiqiang was analyzed adapting SIMI-MOTION sport analysis system. The parameters acquired were to make compare with the foreign elite high jumpers and Zhu jianhua, and to make compare within the success and the failing.The results showed: (1) Velocity of center of gravity in last step was 7.14m/s, that was lower than Zhu jianhua (8.19m/s) and the world elite man high jumper (8.44m/s). Huang's velocity of Z was minus value, especially in 2006,were -0.58m/s and -0.48m/s. (2) Huang's average knee joint angle was 47.74±9.30°, the maximum was 162.38°,the minimum was 138.31°. Knee joint angle would become very much when large cushion scope was adopted. (3) Huang haiqiang's velocity using at cushion phases was 35.46%, and takeoff velocity using was 58.23%. They were higher than other man high jumper in China, but were lower than 1.47% to Javier sotsmayor. Vertical velocity at cushion or extension of add proportion. Buffer phases' vertical velocity was litter than extension phases, such as 56.29%,43.71%. (4) Huang's average knee joint angle was 171.95±4.09°at take-off, the maximum was 178.09°. Anklebone angle was 132.20±3.66°, the maximum was 139.05°. The range of hip joint, knee joint, and anklebone joint were 9.77±0.43°, 24.20±5.21°, 29.24±1.46°, respectively. They were less than foreign elite atheletes. (23.33±4.46°, 32.83±7.55°, 77.33±7.31°).The swing angular velocity of swing leg of Huang was relatively lower, that was 1043.20rad/s. It was lower than Zhu jianhua (1500rad/s). The angular velocity of the failure in cushion was lower than success.