Research On Key Technique Of Chinese Elite Active Male Long Jump Athletes

purpose of research:Through transverse and longitudinal studying to analyse the key technical characteristics of active elite male long jumpers,identifying key issues constraining cause of internal performance improvement,clearing the key problems to be solved in training,and so as to improve the pertinence,and practical effectiveness of training.Research methods:Using method of documentary,expert interviews,three-dimensional video resolution(in conjunction with the two-dimensional video solution),and mathematical statistics.Research contents:Approach,take-off technique and take-off ability in last 2 steps of run-up and take-off phase in the men's long jump final in Tsinghuajump special race in 2015 and some domestic major tournament finals.Research conclusions:(1)The run up rhythm of last two step of world elite ateletes is big-small mode,Step rhythm change significantly.A high speed in the last two steps,is the premise and guarantee for get good results.(2)Body mass center height of drop in the bottom 2step,and in the pedal instantly at the center of mass,The run-up of the last 2 steps total body mass decrease was positively correlated with leaving board instantaneous vertical speed.(3)The lack of take-off ability mainly reflected in Swinging leg angular velocity is slow,Hip and ankle Angle is small and Jump stretching in slowly.Eventually lead to leaps the vertical velocity and leaps the Angle,restrict the ascension of achievements.(4)Similarities but also obvious individual differences in key technique links of our country excellent athletes.Suggestion:(1)Development of run-up speed,steady run-up rhythm,and gradually improve the ability of fast jump under high-speed run-up,Especially the takeoff leg leg hip and ankle rolled shrinkage and swinging leg swinging ability,make thematching speed and takeoff ability coordinated development.(2)For horizontal speed capability up to a certain height of athletes,may be considered appropriate to increase the run-up the last two steps of the body centroid descent,vertical speed up the creation of a suitable space.(3)run-up and take-off technique of Chinese elite athletes in many different styles,the existing problems are not the same,in training should be given different treatment.