The Kinematic Analysis Of The Technique At Final Exertion Stage Of Young Female Shot Putters In Liaoning Province

Shot put is an important representative of the throwing event in track and field.The final exertion stage is the most critical link in the shot put,and has an important impact on the final flight distance.In this thesis,the kinematic analysis of the technique in young female shot putters' final exertion stage in Liaoning Province was carried out to find out the athletes' universal movement rules and the gap between their performance and the excellent athletes in the final exertion stage so as to provide a certain reference for the coaches and athletes in technical training.The thesis uses the methods of document,expert interview,image measurement and mathematical statistic,takes the young woman shot putters in Liaoning Province as the test object,and takes the final exertion stage of shot put as the experimental object.The thesis uses the method of constant speed photography to obtain the kinematic parameters accurately,and synchronizes,arranges and analyzes the data to find out the commonness and characteristic of the young female shot athletes in Liaoning province and the technical deficiency in this stage.The study results are as follows:(1)It's common for the excellent athletes that there is a problem of longer exertion time in the transitional period,whose main reasons are that the leg strength is weak,and the consciousness and timing to control the left leg to fall to the ground is not good enough.(2)The trend of the athletes' speed in the game is reasonable,but at the moment of the right foot falling to the ground,the speed of the athlete's right hip is less than that of the left hip.The awareness and ability of body coordination need to be strengthened further.(3)In the final exertion stage,the athletes' body speed is basically in line with the technical requirements in the last stage,and the athletes have formed an effective and scientific order in the final phase in practice,which lays a favorable foundation for the acquisition of excellent results.(4)The right hip angle shows an increasing trend in the final exertion stage,but to some athletes,the increase is small.It reflects the condition that part of the athlete's center of body weight is too backward,and they don't make the formation that the left side props up body when they throw.According to the conclusions of the study,the following are recommendations:(1)In the young shot putters' daily training,the training of athletes' lower limb strength should be paid more attention to.According to the actual practice of the game,the transition phase timeshould be controlled,and the utilization rate of the shot put step's speed should be raised so as to lay a certain foundation to enhance the speed of shot put in the final exertion stage.(2)The athletes' height may have an effect on the shot's height at the moment that the shot leaves the hand,but technology is still the main element.The athletes have to improve the height at the moment that the shot leaves their hands.We should take full advantages of the height,and do the standard technical action to get the best shot put results.