Biomechanical Analysis On Women's Large-level Weightlifter Snatch Technique Of JILIN Province

Weightlifting snatch is the first game, and it is also a very strong technical action. The snatch technology will directly affect the quality of clean technology. The technology is characterized by the coordination of upward and squatted down support. Women's weightlifting project is one of China's superior items. It is considered to be a key project to win Olympic gold medal. However, in recent years, China's women's weightlifting in large level faces some threat from foreign athletes. Sports biomechanics research on snatch technology can stabilize our international advantage in large-level item, can help us maintain the leading position, and also have great significance for the development of China's Olympic Games strategy. In this paper, the author use sports biomechanics research methods and three-dimensional camera measurement techniques to obtain 6 Jilin Province outstanding technical Weightlifters'action picture, then use image analysis system analyses athletes'characteristics of Completion action. Provide theoretical basis for Weightlifting teaching, scientific training and actual competition.This study reveals the great level of outstanding athletes of Jilin Province in women's weightlifting snatch technical characteristics of the joint kinematics, the kinematic characteristics of barbell, barbell center of gravity and the body center of gravity and time characteristics of the relationship. Athletes through the analysis of joint kinematics that snatch in the whole process, the knee point of a two-valley form of two peaks.In the knee after the end of primers, that is, there is a growing outbreak of the process at this time the main force for the knee joint moment, the quality of the completion of action play a decisive role, and the hip joint angle changes with time, the emergence of a major the peak and reached its peak before the knee; trunk angle appeared to increase after decreasing trend. Barbell clearly the focus of the movement of "S"-shaped trajectory, barbell in the sagittal plane of the horizontal displacement, different athletes have a greater difference between the majority of athletes barbell snatch the course of the vertical line of the ever-increasing speed, only Liu Xiaoqing, Sun Yan-speed trend of decline or stagnation.Center of gravity and the body weight on the more recent focus, in line with the "near" the principle of the technology, which is conducive to the power play, both individual athletes from the heart too obvious. By analyzing the reference time bell was found at all stages, bell stage of extensor strength to relatively slow, and the performance of force in the lower stages of the time more power.