Analysis In Kinematicis On The 5th Hurdle Passing Of Liu-Xiang In 2004 National Track-and-field Champlionship

Currently ,as hurdle race players improve level speed And hurdle passing technique the hurdles becmes an organic Combination of racing pass and passing race LiuXiang , the home player has become a world top one in 110m hurdles with companatively large speed and almost perfect hurdle passing technique . Especially the technique traits of is 5 th hurdle to the 6 th embody completely his superiarity this dissertation analyzes technically his performance of 13.40 seconds faring the national tack-and-field chamipionship in ShiJiaZhuang , and compares it with the parameters from the 5 th hurdle to the 6 th of Jackson , another top player consulting previous research in theory and practice , then draws the following conclusions.a) There is the gap between Liu Xiang' s and international top player' s records in 110m race. To a top hurdle the horizontal speed is of great importance. International 110m hurdle top players' records in loom range from 10.1 seconds to 10.4seconds, while Liu's best record is 10.5s seconds.So improrving his horizontal speed is the key problem to be solved.b) The proper meeting-hurdle technique requires comparatively long starting distance Liu' s distance index between startings sets in the top player' s index range, illustrating his pace, pace distance have formed a stable mold.c) Liu' s consciousness of meeting hurdles is strong, landing angle large starting angle small, the knee angle of swinging leg small, passing speed fast, centre of gravity stable.d) In meeting the hurdle swinging is a little slow, later is fastered during the impetus. The statistics are still smaller than foreign top player' s during the whole process of meeting hurdle.e) Landing after the fifth hurdle Liu Xing' s centre of gravity is high,...