Analysis On Current Situation And Countermeasures Of Man’s20km Race Walking Athletes In China

Objective:By technical analysis and diagnosis of Chen Ding, Wang Zhen, Cai Zelin and some other who were the best20km race walking athletes, the research purpose to find the specific problems of technology present situation of Chinese elite race walkers and put forward more targeted, scientific and reasonable training methods for technical improvement.Method:Under the convenient research in team, conditions, technique index and some modified approaches of technical shortcomings were identified to research based on experts’ interviews of national walking team coaches. With CASIO-FH25camera high-speed shooting mode, the video image data of Chen Ding, Wang Zhen, Cai Zelin, Zhao Qi, Chu Yafei and other players was collected in the competition and training field..Images were processed by Dartfish and Pisaca software,spatial calibration was made by Ai-jie3D DLT radiation frame space and digital information were dealed with by biomechanics Ai-jie analysis system APAS.Results:Supporting phase foot touchdown instant legs and the longitudinal angle of the excellent male athletes in China was16.6°±3.3°,supporting phase displacement of focus distance was0.31m±0.06m and anterior displacement time support phase was79ms±12ms.Stages of supporting feet instant leg and longitudinal angle was27.5°±2.2°;Vertical stage support leg clamping angle was greater than180°; Supporting stage gravity displacement distance was0.46m±0.05m; Support phase displacement time was111ms±6ms; Flight time was70ms±5ms and flight height was0.07m±0.01m.Conclusion:(1) Athletes around the legs to make the step size is not balanced center of gravity of a larger complex step downs, after kicking insufficient step to increase the use of vacated distance, resulting in the flight time fuzzy vacated time, easily penalty. Conducted training for the legs so flexible flexibility to be fully developed so that the tread is more reasonable.(2) Athletes hip range of motion over the small, Torso angle is too large and further restriction the flexibility of the hip joint, thereby affecting the athletes step. Increased flexibility through sit pretty hip exercises and hip stretch for hip, Inclination of the trunk is too large to control through the core parts of strength training.(3) Athlete support leg to the foot and the ground instantaneous angle is too small, the first vertical support legs can not support the gentle rolling transition. Calf raises by weight training so ankle flexibility and strength increases, the gentle rolling pin to reduce the rate of loss, while the force of the front and rear support phase becomes larger, increasing forward speed.