| Walking which is playing together and endurance is the advantage of track and field projects. But in recent years, Walking has not been good results in international competitions, especially in the 2008 Beijing Olympic Games Race Walker and placing the results are not ideal, did not meet the desired objectives. At present, widely used high-speed camera and image analysis method to the kinematics of walking, and fewer data collection, can not get the whole kinematic variation of athletes, but also no section on race walking distance of Technology athletes. This study used several times in different segments of the shooting distance to obtain kinematic information on the Elite Race Walkers Analysis and Research section, while the selection of subjects increased the amount of the research is more holistic and representative. Walking through the technology of our athletes'kinematic studies, analysis of his (her) walking kinematics of features, and evaluation, designed to find elite athletes in the race, Walking technical features and shortcomings, for the action Technology improvements and use of reference and help. In this paper, the use of biomechanics research methods, using high speed video camera (120Hz) measurements of the Eleventh National Games in the 2009 final of the men and 20 km Race (8), female (7) players shot sub-site, camera position from the starting point 2.75km place every 1.98km after shooting a total of nine shooting, access to athletes step a complex image. This study used APAS video analysis software to process software obtained from the center of gravity of the sub-speed, flight time, step length, stride frequency, the center of gravity from the ups and downs, ups and downs from the top of the head kinematics and other related results.Through analysis of the results of research, the following conclusions:1. Compared with the previous half, men athletes speed, step length, stride frequency decreased significantly after the half (P<0.05), which may be physical decline, or around the physical distribution process is unreasonable, technology deformation and so on. Women's half the speed after the step of growing up in the first half but with no significant difference (P> 0.05), stride frequency decreased throughout the step by step, and after the process less than the future existence of a highly significant difference (P<0.01), that women's physical Distribution than men in the second half still reasonable and the higher speed mainly by increasing stride frequency step size decreases to achieve.2. Flight time Our Elite Race Walkers man in a "fuzzy vacated" the lower limit of time, women are "reasonable vacated" time, with the downward trend in the competition after the process was less than the future. In China, the flight time from the male and female athletes are not easy to sentence vacated foul. The center of gravity from the ups and downs, ups and downs from the top of the head men and women were greater than 5cm. From the indicators to judge vacated the sentence of men and women athletes are easily vacated foul. That sentence vacated foul of Walkers main reason may be due to the center of gravity, the head of a relief from the large to the referee on the whole technology under the beating caused the appearance of representation.3. Obtained by correlation analysis of men walking speed and flight time are most relevant for the step index (r=0.950) and stride frequency (r=0.837), indicates that our technology should be the main man walking to increase the step size to control reasonable steps Frequency based. Women Walking on the speed and flight time are the most relevant indicators of step (r=0.878,), that technology should be primarily of Women Walking to increase stride frequency to control the appropriate step based. |
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