Research On The Kinematics Of Frontside 540air Of Half-pip Of Snowboard In Our Country

Objective: In order to reveal the technical features of, key technology and kinematic parameters, and to identify the factors that affect the flight altitude on frontside 540air of halfpip of snowboard,thus providing scientific guidance training for athletes to achieve good results and make the strong foundation.Methods: passing the way of Photograph analysis, to get the kinematic Technical parameters of frontside 540air, which from the athletes of Liu Jiayu, Sun Zhifeng and Cai Xuetong.The results: The pathing way of the athlets in one stage is parabola.the most fast speed before living the lip is about 10m/s,the angle is about 55°,the angle of the twist is about 80°between theory and actual in the air, when they are landing,the speed could be 14m/s.Conclusions:1,The quality of living the lip technical decide the athlets'highth in the air. The crucial factor of the high level are the speed of the body center of gravity, the angle of living the lip, force size and timing of the diego wall. athlets shuould control the angle and learning to use the right side of the snowboard in the moment of living the lip . the body center of gravity should be the same as far as possible with the sliding direction in order to reduce the loss of velocity.2,Because of the difference of site characteristics and slope direction of slot players, in the actual technical movement, there will be little inaccuracy between the air swivel theoretical point and the actual twist angle of the track.3,As a prelude to help smooth out the trough technology, help slide technology's sliding direction and trajectory has a great impact on the quality slot to help smooth glide phase of the ideal line as the straight-line sliding to avoid, or S-curve.4,The best time of a tank tread wall is at the time of the middle of the snowboard living the lip while more appropriate location to landing is closer the lip.Advice:1,Moment to leave the half-pipe, the push strength of lower limb decide the effect of tread wall, therefore appropriate to strengthen leg muscles could be improve the speed of athletes out of half-pipe 2,Deviation of twist degree is widespread,so with the imitation training must be combine with the actual twist degree , to produce the movement pattern.