The Kinematics Analysis On Technical Of The Complete Sliding Step Of Male Shot Throwing Events Of Item-group In 2017

The shot project is a relatively complex sport,and its techniques include holding the ball,preparing for the position,swinging,sliding,transitioning,and finally exerting and putting the shot,each of which is related to each other.In the process of putting shot,each technique is coordinated and coherent,the best condition before shot is reached,the effect of final exertion is obtained,and excellent sports results are created.Therefore,in addition to the necessary physical factors,reasonable and effective sports technology is the key to improve the performance of shot put athletes.The thesis aims to research kinematics based on four male shot putters using backward slide among the top eight in the final competition of 2017 National track and field throwing competition according to a series of research methods like literature data method statistics as well as image analysis and so on.The results show that:(1)In the sliding stage,Chinese athlete WangGuangFu missed the best put during transition phase the best shot put during transition phase due to short distance and long time in the slide process,Sun Shuai lacked physical control ability of his body with his left shoulder and torso opening early resulting in early stretching the upper body to accelerate the shot put so that lacking of mechanical the shot put so that lacking of mechanical effect.to be worse the obvious too long transition time lost the speed at the final exertion stage.However,it was at the final exertion stage that the angle and height of shot determine shot put performance.In summary,Sun shuai failed to achieve good grade because of the unsatisfactory distance resulting from his poor physical control and insufficient extending strength leading to the falling height of throwing.(2)In the transition phase,Sun Shuai left foot landing moment torso tilting angle is the largest,this and the right foot landing moment the upper body lift too high relations.If the upper body opens too high,the amplitude and distance of exertion will decrease,the left shoulder and torso will be opened prematurely,the optimal time will not be grasped,the body control ability will be insufficient,and the upper body will be stretched out too early,and the effect of turning the body on the ground will not be good.The long transition time caused the final force speed to be affected.(3)In the final exertion stage,Tian Zizhong and Sun Shuai’s right ankle angle stretch too much,Wang Guangfu is insufficient,pedaling is not active enough.Tian’s knee extension is large enough,while Yang Kang does not do enough,and the range of stretch is too small.Sun Shuai shot put slowly,the angle of release is smaller than the other three players.