An Analysis On The Main Characteristic Of Kinematics And Dynamics Of Shaanxi Provincial Excellent Sprinter Mid-way Running Technique

Sprint is the track and field sports infrastructure project, speed is sprint the core of the project ideas, on the way to run stage is the continuation of the high speed run and keep the important component, at this stage, every single step of technical movements are directly affect the performance of the movement of athletes. Based on the three engaged in sprint, long jump project level athletes as the research object, Adopting high speed camera and 4 d force measurement machine synchronous experimental methods, combining the expert interview and mathematical statistics method, Combined with the specialized theory and the practice of the tested athletes ability two aspects of the situation, from the Angle of sports biomechanics subjects in sprint athletes run way in the process of support and turned the technical movement analysis stage. Will be try related parameters of the athletes and the overseas elite athletes of the data analysis, draw the following results:1. Run in the way technical movements, from the landing, the largest buffer time and moments from the ground to three subjects moment of the Angle of the hip, athletes elbow, knee joint Angle Angle and ankle Angle analysis, Run by that stage in road arm try athletes in the reasonable scope; Hip Angle and moments of knee joint Angle from all within the scope of study in that analysis data is reasonable.2. Subjects in support of stage athletes, the athletes buffer time, try buffer distance, landing on the view, and the distance of the reaction of the tested data showed that athletes in the touchdown process of the resistance is bigger, active touchdown paratively insufficient, affect human body level speed. In the step length, excellent foreign athletes obviously less than average step length, and be try a little more than foreign athletes stride length is excellent athletes average stride frequency. On the moment into the biggest buffer period, the push to the average of the stage after increased significantly, the balance of the body reduced stability.3. Subjects in support of athletes buffer period, support the reaction by the graph reflects:Fz force value curve change relatively smooth, increase the pedal to the force can obtain a bigger reaction, make support the reaction in figure can form an obvious force value is large and buffer time short force value curve trough. Fy-t graph and Fx-t the graph shows that the athletes in support of stage to master a push to the timing of the stretch, and pedal out action to do the initiative. In the touchdown buffer period immediately after about adjusting direction, and then the stability of support for the stage, achieve better technology movement request.