The Study Of Situ Javelin Movement Coordination Characteristic In The Action Learning Process

Motor coordination in our daily life is often mentioned, there exist many different views and opinions about formation mechanism of motor coordination and formation of the law, but which were only from one or a combination of several aspects to elaborate motor coordination, and eventually came to " the interaction of the human body's physiological systems, psychological system and external environment resulted in the formation of the motor coordination ", and there were not research about characteristics of motor coordination in process of learning and mastering some sports.The purpose of this study is analyzing some changes of indexes of body under the influence of environment system from the perspectives of kinematics and biological perspective in process of formation and development of motor coordination, through which analysis descript the characteristics of motor coordination in standing lateral javelin.In order to achieve the purpose of the study, standing lateral javelin was selected, a one-month teaching would be implemented. First demonstrator do a coherent action, and then subjects complete the entire action according to what they watch, at the same time simultaneously doing EMG and photographic tests, results and the corresponding effective number would be recorded too, each three times; In the next several session demonstrator taught decomposition and coherent of action, and after mastering all action, and then subjects completed the full set of actions according their memory. At the same time, EMG, photographic tests, results and the corresponding effective number would be recorded, each three times; at the end of the course, demonstrator and subjects do all the same tests above all.According to the experimental results and analysis the following conclusions:In action learning stage, subjects didn't know how to distribute the first stage time and the second stage time, didn't control the angle of the shot, and didn't pull "back bow" because they didn't distinguish the difference of throwing the javelin and other throwing projects. They didn't realize the importance of collaborative muscles, just using the power of the major muscle groups. MPF of muscle fibers were relatively small, the participating muscles were activated too early or too late, and which hadn't a certain order.The subjects had a general understanding of the action when the demonstration were completed, but whose motor performance was too stiff, parts of action were not close, and more energy were loosed. The contribution of collaborative muscle was increased while the contribution of active muscle was decreased in different action stage, and muscle were activated too early or too late yet, but which showed a certain sequence. The conduction velocity of some major muscles involved in movement an action key muscles involved in increased.At the stage of action skilled, subjects could skillfully complete the action. They not only focused on using collaborative muscles to complete the action, but the active muscle and collaborative muscles effectively together. Thus the muscles could be activated in a short time and showed a certain degree of ordering. MF of main muscles fiber were the same compared to the stage of completed action teaching, while MF of collaborative muscle relative decreased compared to the stage of completed action teaching. Muscles activities showing were more and more coordinate.