Biomechanical Analysis Of Different Equipments Throwing Technical Characteristics For Elite Female Discus Throwers Of China

This paper mainly use the mothed of biomechanics,by the test of three types of devices synchronous—high-speed cameras, three-dimensional force platform and Electrical measuring instrument,to experimental study of different equipments throwing technical characteristics for elite female discus thrower of China,get the date of kinematics,dynamics and the mainly of muscle electromyography when they Completion of the throwing motion. The aim is to provides ralavitely scientific and accurate theoretical basis for the coaches to arrange design special strength. Kinematic data is throughing the Ariel Performance Analysis System motion analysis software processed, Dynamics data obtained from force plateform will be dealt by the Bioware software to get the lower limbs three-dimensional support reacting force changes,the clectrical date from the experiment will synchronously with image, by the Megawin software get the athletes to complete throwing motion measured muscle clectrical and integral elcctromyography. The results show that:the throwing heavy equipment can improve the athletes at the average speed of around double support phase and right foot off the ground when the instantaneous velocity and moves fastest when throwing iron rod; Throwing heavy equipment for athletes in the double support body torsion tighter turn up stage, shoulders, chest, arms open more fully, make the athletes on the technology link get enough rotating momentum; Throwing heavy equipment most muscles activities are more intense, iEMG are more bigger.The research method involved in this study containes the literatures,experimental method, mathematical Statistics method, comparative analysis method.The study shows:1、Double support stage throwers used the longest time, throwing the heavy discus with the shortest time, in the right arm swing pre-exist the problem of excessive maximum speed when throwing heavy discus, it can helps reduce the maximum pre-swing speed. With the mass of throwing devices increase, the muscle portion integral elcctromyography also increases.2、Sngle-support phase, compared with foreign athletes, it show that China women athlete throws three instruments used for a shorter time. From the results of elec--trical view, technology is more mature Ma xuejun Li Yanfeng, throwing three in- -struments when comparing muscle discharge stability;Jiang feng-jing and Yang fei too nervous when throwing heavy discus and standard discus,the biceps too tight,the wrist muscle lack of good force.3、Flight phase, the China women discus throwers close to absolute time world elite women discus throwers, throwing intense muscle activity when compared with heavy discus and iron bars, and the maximum numerical integral elcctromy--ography.4、The transitional stage, athletes throwing heavy equipment must be longer than the time for throwing standard discus, at this stage, Ma Xuejun of the rate of decline than the flight phase of the discus speed; athletes foot landing,3-D force curve showing a rising peak and two buffer force peak phenomenon, left the when also showed the same results, good athletes forward and perpendicular to the ground force numerical is large, muscular tension transition of Jiang Fengjing and Liang Yan in the throwing proces.5、The final phase, the time for Ma Xuejun long shots;the release of height Ma Xuejun and Jiang Fengjing is lower, and the release of angel throws standard discus and heavy discus is too large;the speed is fastest throwing iron bar and that can improve the release speed.