A Three-dimensional Kinematics Study On The Technical Characteristics Of Chinese Excellent Men's 20-kilometer Race Walking Athletes

In this paper,using the methods of literature,three-dimensional video analysis,Mathematical Statistics and comparative analysis,two cameras were used to shoot the20-kilometer walking final site of the men of the 13 th Olympic Games,and each of the six collection points of the previous eight athletes was the research object,The technical action characteristics of eight athletes in walking walk were studied and analyzed.The results show that:1.The first eight athletes in the game full emptying time within a reasonable time limit,the second half of the vacated time is larger than the first half,there is still the possibility of being awarded;the top eight athletes left and right leg support time as a whole is smaller than the world's advanced level,support time is shorter.The first eight athletes left the single step time is greater than the right one-step time,left-hand single-step time is not balanced.2.The vertical displacement of the total center of gravity of the top eight athletes is larger than that of the world's elite athletes.Edge Tongda and Wang Kaihua two athletes in the first half of the game center of gravity fluctuation is large,side Tongda and Chin's in the second half of the game center of gravity vertical displacement is larger.3.The speed of each joint in the right arm of the top eight athletes is significantly greater than that of the joints of the left arm,the swing of the right arm is not coordinated,and the top eight athletes have a large difference in the center of gravity at each moment,with a large difference in speed between individuals and different technical levels.4.The first eight athletes in the whole course of the game off the ground instantaneous knee angle is small,easy to be awarded flexor leg foul;there are some differences in the range of pedal extension of left and right ankle joint,the range ofpedal extension is smaller,the angle of two thighs in the second half of Chen Ding is smaller than that of the first halfThrough this thesis,we hope to reveal the technical characteristics of athletes,enrich the theoretical research on men's 20-kilometer walking technology in China,diagnose the walking technique of athletes,and provide some technical reference for the competition and training of other athletes.