| race walking technology plays an important role in the stability of different speed ranges.As members of the research in this paper,the authors follow the speed of the state sport general administration team in taicang,jiangsu province in 2018 the iaaf world walking group championship game,and select 5 players(four)1 foreign athletes,Chinese athletes at low speed,medium speed,high speed stage of sports technical analysis as the research object,realize our country outstanding female athletes,20 kilometers in different speed range of the technical features,through the analysis of the movement technology,reveals the technical features of excellent athletes in our country,strive to accurately find out the advantages and disadvantages of the current,make the technical training more targeted,The aim is to maintain and improve the overall competitive level of China's women's 20 km race walk,improve the scientific level of training and competition,and provide some references for better preparation for the 2020 Olympic Games.The research mainly adopts methods of literature review,expert interview,high-speed camera measurement,mathematical statistics and comparative analysis to reach a conclusion:(1)China's elite female race-walkers,qiyang shijie and Yang jiayu,showed obvious acceleration in the second half of the race,and the whole race presented a gradually accelerating rhythm;Wang yingliu has more speed changes and more energy consumption.Wang na second half of the speed obviously,physical and mental quality needs to be strengthened.China's athletes sprint after the ability to improve the space,and this competition champion gonzales compared with the sprint is not strong enough.(2)The average stride length of China's elite female race-walkers is smaller than that of the world's elite athletes,and there is a problem of uneven left and right stride length.And there is still a lot of room for improvement in step size.In the high speed stage,Chinese athletes' step length decreases and step frequency increases,which indicates that at the present stage,athletes rely on increasing step frequency to improve speed,and the high speed stage is the high-risk stage for fouls.(3)On the one hand,the elite female race-walkers in China have a large shift in their center of gravity,and the suspension time at high speed is close to the fuzzy critical point.On the other hand,both of them have the problem of insufficient Angle between their legs,and there is still some gap between them and the world's top athletes.The main reason is that the swing of the upper and lower limbs is not enough to relax and strengthen,and the muscle group of the hip is tense,which leads to the impact on the performance of stride length.(4)Our country outstanding female foot race walking athletes in ham overlap when swinging leg knee joint Angle is relatively reasonable,with an average of101.75 °.The index of knee joint of China's elite female race-walkers reaches the world's excellent level at the moment of landing and the moment of vertical,especially the "anti-bow" characteristic in the moment of vertical.Cut Yang shi elder sister,Yang jiayu,wang na foot sole touchdown elevation Angle slant is small,sufficient heel is landed not apparent,have improvement space.(5)The outstanding female athletes in China have the problem of insufficient backswing.The backswing range of qiyangshijie is large,but the front swing is too tense.The tension of the front swing leads to shoulder shrug,and the tension of the upper limb swing will affect the amplitude of the backswing.Wang yingliu's back swing is insufficient,but the front swing is relatively relaxed,and the elbow needs to be strengthened to improve the back swing. |
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