| Objective: Shandong Province outstanding actually go Walkers Action Technology biomechanical analysis,Elite Race Walkers during lower limb joint motion technology and speed loss-existing relationship,lower extremities of the joints acting situation and joint contribution in walking process rate,identify the impact of walking athletes loss of speed reasons,to provide recommendations for improving Race Players technology fluency and economy.Experimental Methods: Vicon simultaneous connections within the operating system and Kistler force plates and capture Race Walkers operation information,the use of software to extract Players Visaul3 D technical parameters for data processing.Participants: 15 Elite Race Walkers Shandong ProvinceMain Outcome Measures: 1.kinematic indicators: the center of gravity shift,stride,the flight time,the hip rotation angle,speed loss,the ground ankle angle and ankle joint angles from the ground 2 dynamics indicators: the ratio of the first peak impulse,backward impulse,joint torque,power joints,joint contribution rateResults: 1.The rate of loss and displacement of the center of gravity of a correlation coefficient of-0.49,P value of 0.046.The first correlation peak impulse ratio is-0.502,P value of 0.048.Ankle joint contribution rate of correlation coefficient of-0.562,P value of 0.024;hip angle of rotation with the stride of a correlation coefficient of 0.589,P value of 0.013.The correlation coefficient for the flight time and the pace of 0.686,P value of 0.002.2.The center of gravity vertical displacement and the correlation coefficient backward impulse was 0.605,P value of 0.017.Ground ankle angle and ankle positive power correlation coefficient of-0.685,P value of 0.003.Ankle joint contribution rate of correlation coefficient of-0.586,P value of 0.017.Successful knee negative correlation coefficient of-0.557,P value of 0.025.And the correlation coefficient of the knee extensor maximum torque is-0.602,P value of 0.014.And hip positive power correlation coefficient of-0.513,P value of 0.042.3.Ground ankle angle and ankle positive power correlation coefficient of-0.741,P value of 0.001.Ankle joint contribution rate of correlation coefficient of-0.625,P value of 0.01.Successful knee negative correlation coefficient of-0.654,P value of 0.006.And the correlation coefficient of the knee extensor maximum torque is-0.779,P value of 0.001.And hip positive power correlation coefficient of-0.734,P value of 0.001.Hip hip flexor torque and the maximum correlation coefficient of-0.517,P value of 0.04.And the contribution rate of hip correlation coefficient of 0.509,P value of 0.044.Conclusion: 1.Race Walking after foot touches the ground in the longitudinal direction of the first pawing effective force can serve to reduce the rate of loss of effect;after walking athletes vacated gravitational potential energy can be converted into forward momentum to help the body get some forward momentum to avoid foul vacated,the vertical displacement of the center of gravity height Walking should be maintained at 4 ~ 5cm.The center of gravity height and vertical displacement of feet off the ground in preparation forefoot Scroll to the toes push off the ground and the degree of force when kicking off the ground ankle generated control characteristics associated.2.Loss of joint motion technology and speed ankle is directly linked to and affect other joints of lower limb movement technology economy.Ground ankle joint angle and velocity loss is most closely related,appropriate to reduce the ankle joint angle from the ground and kicking when kicking ankle reasonable transition to the toes and forefoot off the ground with the level of coordination tends to reduce the rate of loss.3.Walking Movement forefoot toe transition to the final phase of the hip is not kicking continued kicking hard,but ready to push off the ankle before the ground has stopped hip hip flexor ready to swing forward.There is a close link from the ground ankle joint angle and speed loss. |
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