Biomechanics Characteristics Of Supporting Leg When Race Walking , Sprinting And Long Jumpers In A Different Ways Ground

Different sports with tails in the ground of his land was not only a necessary stage, and was to complete the action, the key to improving performance, but also the source of the generated power, it is the players complete technique is critical details, but also of fundamental guarantees. This study of the tigongdadui race team of four players and Xi'an Institute of track and field team specializing in Sprint 8, jump athletes as research objects, using high-speed camera and three-dimensional force platform synchronization of experimental testing method, expert interviews and mathematical statistics, and other methods, from sports biomechanics efforts on subjects to different items of the race, the dash, the long jump ground to support phase of dynamics and kinematics features and a movement from the theory and practice of angle on related differences, exploring the different professional athletes in the Sprint Race walking, and long jump at the tail, while supporting the rule of the present phase, as far as possible to base coaches and players in the future of training and competition provides a true reference information. Improve coaching on medium-level understanding of the technical details, thus enriching base coaches training thinking and ideas, basic training and specialized training. My conclusions were as follows:1.The same players in a race, the dash, the long jump, as the project change, walking, and long jump support time corresponding decrease, to go with tails in supporting an average of 0.921s, to run with tails in supporting an average of 0.101s, to skip when supporting an average of 0.186s. Participants in the buffer is relatively long stretch of time is short.2. Different items of the race, the dash, the long jump, as the project change, speed walking, dash, the long jump with support when touching the ground, kicked in, and a sectoral angle. Participants in the ground, kicked-off with angle, angle increased from sector.3. Different items of the race, the dash, the long jump, as the project change, walking, and long tails in the ground to support time gradually reduce the angle of the knee; maximum buffer time, departure times knee angle increases; ankle angle in the average of the three phase. Volunteers knee angle is large, buffering action phase of the hip angle increases, the angle when small ankle, maximum buffering times larger.4. Different items of the race, the dash, the long jump, as the project change, walking, and long jump ground support when foot vertical (Fz) reaction force peak, support time gradually reduce the Fz-t curve double wave crest. To walk, run, jump, an action when a strong rhythmic coherence. You can see from the curve: If the lower extremity muscle strength quality fixtures, the resulting brake impulse is smaller, form a force big time and a shorter crest.5. Different items of the race, the dash, the long jump, as the project change, walking with support for time before and after (Fy) plantar reflexes of force peak, gradually reduce support time; when each support before and after (Fy) plantar reflexes of force peak, support time. Long jump with support for time before and after (Fy) plantar reflexes of force peak gradually reduce support time gradually reduce; relative to the race and long jump with support for the Fy-t curve, when each support for the Fy-t curve force when the peak is large, the greater the level of braking force. And the long jump with support for left and right foot while (Fx) force peak is running and when the foot or so (Fx) force peak, weak support.