Sports Biomechanics Research On The Action Structure Of Drop Jump About Sport Fatigue

The sport fatigue is the ineluctable phenomenon of the athletics sport .In the same time, it is very important to the athletics teaching and training. In the research of that realm, many scholars of home and abroad concentrate on research aspects for the sport fatigue of some phenomenon carried to explain and apply, such as physiology, the sport biochemistry and the sport medical science...etc. But in the aspects of sport biomechanics, some scholar separately tired to sport in vertical jumped, the research of drop jump is an extremely minute.This text is creative be placed in which , the trial make use of three dimensions force platform, film analysis and other methods to measure the sport biomechanical methods, by the control experiment condition(exercise tired front and exercise tired empress), on the test of the drop jump ,the investigation is passing the analysis to these affect that the factor towards the influence which the action structure of drop jump produce, the purpose of the analytical legs sport fatigue is provided the sciences data of the first step for the relation that the further announces to public of the sport fatigue and the human body sports ,in order to drop jump theories to lay the foundation, at the same time for the related sport training to provide the new way of thinking.The result of this study is that: opposite to not fatigue condition, in the condition of sport fatigue, the action structure of drop jump have obviously changes in various characteristic. From the experiment data can explain that: On the one hand , the period of the action is shorten; The sport time also shorten; the ability of the muscle working is descended ; the result of drop jump also lower; Each link attends the sport ability to descend. On the other hand, the period of action to shorten, at the same time the recoil of the ground also descend, blunt quantity value descend, but the rear force and the level force increase, and blunt quantity value all show the obvious of heading up .This also expresses to drop jump efficiency to descending .End in the joint angle aspect, after the fatigue the joint angle have obviously variety, the store flexibility energy of drop jump and the utilization descend. So that, fully using of the sport biomechanics parameter index sign to measure whether the machine body attains the sport fatigue or not, this will to the sport fatigue of judgment provide more method, this will provide the theories according to the method of the related sport with training and new design way of thinking.