| Walking with its own characteristics,occupy a space for one person in athletics.Walking is cyclical endurance racing in a certain distance,athletes are to maintain a certain speed at the same time,but also pay attention to technology action norms,but also avoid foul watch good.This paper focuses on the Chinese female athlete Liu Hong 20 km studied at the 2015 Beijing World Championships race technology,in order to find out the shortcomings of Liu Hong walking technique,improved in the days after the training,to lay the foundation for preparing for the 2016 Olympic Games in Rio and future Games achieved excellent results.This article from the perspective of kinematics,Liu Hong will complete during the race walking technique in stages to carry on the analysis,through the parameters of each stage of the technical indicators to analyze the impact of race,to provide reliable data support for Liu Hong in training and competition.This paper adopts the research methods of literature,expert interviews,positioning three-dimensional camera measurement method,image analysis and mathematical statistics,the focus is the image analytical method and three-dimensional camera measurement method of data analysis of Liu Hong race field after the shooting,it can rely on the data.The following conclusions are drawn through the study:1 Liu Hong in the game after the half speed is obviously faster than the first half,shows good effect after endurance training,physical fitness improvement.The whole speed is gradually increased,but the fluctuation of acceleration and deceleration,until the last stage of the highest speed,indicating their endurance and walking technique has also influenced the overall speed.The race Liu Hong used in the process of speed tactics is to slow after the fast speed,in the second half of the athletes entered the final with the more difficult,more favorable to achieve good results of walking.Throughout the game,Liu Hong's flight time most control within a reasonable range,but in the sprint stage also has vacated the critical time abroad,the need to strengthen the ability of technical specifications maintained at high speed under the sprint.2 Liu Hong in the race in the process step and frequency range is relatively reasonable,but has little effect on the frequency step increased speed,decrease the race speed is not too much.At the same time,the vertical displacement of Liu Hong during the game in the body weight range is relatively reasonable,the eyes will not see flying phenomenon.3 Liu Hong in the race during the process of single step and the right step in the angle of the elbow are similar,indicating that Liu Hong has a more balanced upper limb swing strength,reduce shaking body weight,angle of elbow joint in a reasonable range.The reduction of the swing radius of the upper limb can increase the swing speed,but the swingradius is too small will also cause the body muscle tension,will consume too much energy and affect the movement of the body.4 Liu Hong in the double support phase two thigh angle in a reasonable range,the step in the process of walking range,but also for the frequency has no effect.Liu Hong in the race in the process of the knee swing angle is relatively reasonable,clear no phenomenon in the process of walking legs.The rotation rate of 5,the hip will adapt to the speed change,Liu Hong's hip technology is relatively poor,can not increase with walking speed is very good,that the flexibility of the hip is not good enough,resulting in an increase in the amplitude of rotation of the hip is limited,can not meet the increasing speed in the process of walking step,limit the step amplitude. |
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