| Using 4 SONY high-speed video cameras and analytic recorders on Liu Xiang, a top male hurdler of our country, who gains the gold medal of the Olympic Games in Athens. We record synchronously from positive and side for three times in a fix position absolutely then compare the staged parameters. Compare the hurdle technique parameters with other top 110m hurdlers' technique in world track and field championship. The goal is to study the sports deeply and do good to other hurdlers. The result shows: 1. The highest speed between hurdles of Liu Xiang surpass the average speed of the other 8 top 110m hurdlers' technique in world track and field championship in Paris France 2003 . The number of the clearance of hurdles in a high speed is as many as others. 2. The stride frequency ability of the three strides between hurdles, burst of speed are some better than others. 3. Liu Xiang's consciousness of the takeoff and attack into the hurdles is strong, support phase is short, take-off angle is small, but the body's center of gravity flight angle is big and his hurdle time is not fast. 4. Liu Xiang's straightened swing-leg when land, land angle is big, land distance is near, his swing-leg's arthrosis angel is big when land, ankle passive cushion is not distinctness, cushion range is small, support position is high, and the distance of landing is near. 5.Liu Xiang's length of three stride between hurdles and stride over hurdles is coherent contrasted with the excellent athlete in the world , the ratio of the distance of take-off and attack the hurdles and landing distance is nearly to the ideal one.
|
PDF Full Text Request