Kinematics Study On The Technical Characteristics Of Walking Race Of Chinese Elite Female’s 20km Athletes

It is a traditional advantage of women’s 20 km race walk.It has a special and important significance to improve the technique of women’s race walk and improve the achievement of race walk.This paper mainly adopts the methods of literature,measurement,mathematical statistics,comparative analysis,expert interview and observation to study and analyze the skills of the top six Chinese female adult athletes in the 2021 National Race Walking Championships and Olympic Trials,and summarizes the advantages and shortcomings of the skills of Chinese elite female 20 km athletes in race walking.An analysis of the skills of the top six athletes reveals the following conclusions:(1)The time characteristics of the top six Chinese women athletes showed that with the increase of walking speed,the air time was reasonable;Front support time increases;The post-supporting time is longer than the pre-supporting time,which is conducive to the performance.The conversion time is relatively reasonable;With the acceleration of speed,the restep time is shortened,and the change of overall single step time is also shortened with the acceleration of speed,which shows that the single step time is negatively correlated with the race speed.(2)The trunk technical characteristics of Chinese female top six athletes are relatively stable and balanced at high speed.(3)The upper limb technique of the top six Chinese women athletes was characterized by large front swing and small arm Angle;The backswing Angle of the big arm increased,and the relaxation degree of the right arm was better than that of the left arm.The wiggle speed of elbow joint increases with the acceleration of walking speed,which is consistent with the changing trend of modern walking techniques.(4)The lower limb technical characteristics of the top six female athletes in China are that the Angle between the thighs increases with the increase of walking speed.The landing Angle is small;When the thigh overlaps,the knee joint Angle is small,the swing leg is more tense,and the hip joint is not relaxed enough;In terms of knee swing speed,all the six athletes showed good knee swing technique.(5)The step length characteristic of the top six female athletes of our country is unbalanced,and with the increase of speed,it shows an increasing tendency of different degrees;The characteristics of stride frequency are shown to improve with the increase of speed,but the left and right sides are not balanced.Athletes’ speed can be improved mainly through the following three ways: increasing step length,increasing step frequency,and increasing step length and increasing step frequency together.