Analysis Of Backstroke Technical Kinematics Characteristics Of S6 Level Disabled Swimmer Jiang Fuying In China

Research Objectives: Taking JiangFuYing, which is national handicapped swimming team physical disability (no arms) S6 level outstanding athlete, as the research object, this paper analyzes the different technical movement which used in different match by Jiang. And this content combined with disability level and technical features closely, making research results could be applied in training and competition. Then it gives scientific basis for diagnostic technology, improvement action, optimization technique provides, and provides certain references for London Paralympic Games and scientific training arrangement.Methods: The research object of this paper is Jiang Fuying, who is physical disability (no arms) S6 level outstanding swimmer. Based on literature data method, observational method, questionnaire survey, video analytic method and mathematical statistic method, this paper obtains relatively complete body parts of the action time, displacement, velocity and angle of each joint dashing parameter by using image analysis systems of American ARIEL. Results: From kinematical analysis of swimming techniques of disabled swimmer Jiang Fuying(no arms) when she is moving, the research reveals the movement patterns and characteristics of technique in underwater.Conclusions: (1) JiangFuYing uses legs alternate kick in backstroke 100 meters project in Yunnan, 2007. In 2008 Beijing Olympic Games backstroke 100 meters project, Jiang uses reverse butterfly kick technique. The butterfly kick technology is beneficial to produce larger propulsion, and the score is better than in legs alternate kick.(2) When she is moving, the strength of push mainly comes from body and legs kick technical movement coordinated forcibly.(3) In order to compensate imbalance body control of physical disability (no arms), alternate kick acts as left leg regular kick while right leg kick in a certain cycle, and rhythm is basically the same. But the range of two feet of Jiang is not agreed. The rhythm of left foot kick is change similar, have a stable cycle. When she do reserve butterfly kick at the same time, it has significant ups and downs. So there is no fixed body position of Jiang Fuying in swimming.From contrastive analysis of two matches, the maximal displacement of foot is 0.389 meters for incoherent and inadequate alternate kick. When JiangFuYing adopts reserve butterfly kick technical movements in two legs, it is better than the upper and lower alternate kicking technology.(4) From the orbit of Y axis of Jiang’s barycenter, the curves have significant ups and downs. It shows body barycenter have significant fluctuation when she is moving.(5) From the joint angle, at the end of the first kick, knee-joint bends to 108 degree, while hip-joint bends to 156 degree, obviously less than abilities. At the end of the second kick, the knee-joint and hip-joint closes to 180 degree. At the end of up kick, there is no difference with abilities in knee-joint degree, but hip-joint degree is obviously less than abilities.Suggestion: Hope that the physical disability (no arms) S6 level outstanding swimmers adopting reverse dolphin kick in matches like Jiang Fuying. And it helps keep high physical location to produce larger propulsion and improve exercise score.