Comparative Analysis On Technological Kinematical Characteristics Of The Chinese And Foreign Elite Man 20 Km Race Walking

Race Walking belongs to term with skill and resistant,which is China's Track and Field preponderant Program.In recent years,There are significant difference in our athletes result between international game and domestic game,with the phenomena of our athletes fouled out of the game.By Comparative Analysis of race kinematic technology indicators of kinematics of Chinese and foreign athletes who attending the International Race Walking challenge game in 2007 in anattempt to discover the race's kinematic characteristics and the reasons accounting for the poor performance and the penalty,and analyse the telative facters of structure of the race walking.The high-speed cameras will be used to take a photo of Chinese and foreign outstanding male 20 kilometer race walking athlete attending the game and the photos will be resolved.Chinese and foreign male 20 km Race Walking technology kinematic characteristics were comparatively analyzed using the movie analysis law,and statistics research methods. Using gray connection analysis method,race walking movement technology structure kinematics'the relative facters had been alynased.This study reached the following conclusions:1.There is a characteristic of small stride width and quick pace, compared with the tech-nological characteristic of foreign athletes.2.The time they emptied out,the supporting leg in the knee angle.There is no difference with foreign athletes from the time they emptied out and the kneel angle of the supporting leg at the locating moment,vertical moment and the left moment.The time they emptied out has a extension tendency with the game continuing;Chinese race walking athletes body center of gravity vertical displacement is slightly bigger than the overseas athlete.Along with competition's advancement,athletes body fatigue accumulation,the Chinese and foreign athlete's bodies center of gravity vertical displacement has the e(?)tendency;The single-step supporting time of China's athletes(?)smaller than foreign athletes.And the former supporting tim(?)y equal.The latter supporting time of Chinese plays time is less than foreign players.3.China's athletes' angle mode by the ground and the foot of swing leg at the moment of heel strike is slightly less than elite athletes abroad, the same with the range of the movement of the angle,the angle has a gradually decreasing trend with the competition;Our country athlete's angle of elbow joint at the most of forward swinging has been increased according to the paper about race walking;Chinese athlete's swinging arm technology movement's difference is big;Foreign athletes joint speed of the knee and ankle on the back swinging stage is bigger than that of the forward swinging stage.Chinese athletes joint speed of the knee on the back swinging stage,is bigger than that of the forward swinging stage. But Chinese athletes joint speed of the ankle on the back swinging stage. is smaller than that of the forward swinging stage.Because of the swinging leg continuously accelerating swinging,the time of the forward swinging becomes shorter.So the plays easily are fouled4.the center of gravity vertical displacement play a main role on the speed of 20 km race walking,which is consistent with our country athlete's more ups and downs symptoms movement.On the front support phase it play amain role on the speed,which is the distance of the front support phase,the average speed of kneel joint of the back swinging,the average speed of ankle joint of the back swinging,the time of the front support phase.On the vertical support phase,which is the angle of kneel joint of on the vertical support phase,the angle of the left elbow on the vertical support phase,the angle of the right elbow on the vertical support phase;On the back support phase which is the time of the working ankle on the vertical support phase,The angle of the ankle lifting off the ground,the speed of the ankle joint on the front swinging phase, the speed of the kneel joint on the front swinging phase,the angle of the kneel joint lifting off the ground.