The Kinematics Analysis On The Characteristics Of Last Exertion Technique Characteristics From Elite Chinese Women Discus Throwers

Research objectives:Discus is a sports project full of technical and complex. Recently, Profound changes has coming up in many aspects at home and abroad, how to keep and carry forward the obtained achievement and how to made great achievements to our country is obviously become a focus problem.The improvement of performance has closely relationship with the improvement of technical.Our scholars has proceeded many significative research about the kinematic characteristics of the discus techniques. The final purpose of mass of research and analysis is to obtain breakthrough performance.In recent twenty years, with the intensive study of the discus techniques which by means of the sports biomechanics, especially the vidly used of the three-dimensional camera and three-dimensional images, people has acquaint themselves with and comprehend each step of the last strength technology when throwing the discus.But the research of heme kinematics in some ways has shortcomings:Most of the technology contrast without thinking of the comparability; On the other hand, it is limited by the instrument, and then affecting the accuracy of the kinematics parametric in the process of absorb data.The purpose of this article is to analysis by the three-dimensional, then obtain the kinematics characteristic of our country’s women in the last throwing process. Meanwhile, compared and analysis these kinematics characteristic, finally, summarize the similarities and differences the kinematics characteristic of the last throwing process. Summarize the technology style respectively, and according to these kinematics characteristic analysis the advantage and disadvantage of technology effect. On the science basis, provide the objective theory for the effectiveness and rationality technology disciplinarian.Methods:this article research the last push step technological of our country’s excellent woman discus athlete at this stage by document literature method, expert interviewing method, three-dimensional camera method and mathematics statistical method.Conclusion:1. the change of the positional and the fall of the peak and the nadir contain different force formal:first, the shoot angle and height of Li Shenyang is reasonable, this provide better score, the discus nadir of Li Shenyang at just behind relative to physical. The speed of left shoulder, left hip greater than right shoulder, right hip, this way she has the reasonable speed rhythm.The movement of Li yangfeng’s discus assumed declining state, which unit as one of the vertical force and spin swing, enriched the final force dynamics. The force time is short, the shoot speed and the shoot angle is higher than other athlete. At the last step of force Li Shenyang’s left leg press close to the inside of shank, which can touchdown positive and active, the left side coordinate the movement of centrobaric.2.The last force technical characteristics step of Song aimin is as follow:the shoot speed is slower than Li yanfeng, and the shoot height is lower, she need to improve the shoot speed and the shoot height. When the discus at the nadir at the right behind relative to physical, then it far from the shoot spot. it provide guarantee to ideal shoot height at time and distance.But Song aimin is limited by the shoot angle and directed, which has little time and distance. This limited the shoot spot and the vertical height. The vertical height of the shoot spot is an important condition, which decided the flight attitude and direction of the instrument.3.The last force technical characteristics step of Ma xuejun is as follow:the discus of Ma xuejun is at the right behind relative to the physical, the shoot height is lower,but the right shoulder, right hip is greater than the left shoulder,left hip, which made the part physical reasonable. the support distance is smaller, we can speak that she dose not take full advantage of the physical condition to reach maximal effect.Meanwhile Ma xuejun and Ma xuejun has the same disadvantage, they limited by the shoot height and the shoot direction,which induce to no more plenty of time and distance.