Research On The Difficulties Of Jump And Leap In Competitive Aerobics

Difficulty is the core content of competitive aerobics, is the key to victory for athletes. The difficulty of jump and leap accounts for half of the difficulty in competitive aerobics, the quantity, type and difficulty value are directly related to the overall quality and the technical level of the whole-set movement, the coaches and athletes has received great attention.This study used literature, expert interview, video analysis, and mathematical statistics method, combed the change and development of the difficulties of jump and leap in rules, and further discussed the technology theory, comprehensively analysis the application characteristics and law, in order to replenish the development of the theory of the difficulty technology and provide the reference to the hole-set movement layout and training for coaches of our country. The study conclusions include:in edition rules2001,2005and2009, the number of the difficulty of jump and leap is overall stability, a bit. of ups and downs, the percentage first drop rise again; difficulty classification is gradual ly reasonable; the difficulty level tends to be rich; low value difficulty continues to decline, high value difficulty steadily increased; the technical specifications and minimum completed requirements become more meticulous and strict.According to the complexity of the technology, the difficulty of jump and leap can be classed into monotonous movement technology and complex movement technology; According to the discretion of the difficulty value which is divided into low, medium, high, and super high difficulty; the difficulty elements of which is summarizes for24.The difficulties of jump and leap which are to be chosen mainly are medium difficulty, followed are high and super high difficulty in the 11th World Championships, shows the technology of the difficulty of jump and leap of the modern competitive aerobics moves toward high and super high difficulty expanded and stronger on the basis of maturity.The difficulties of jump and leap which are to be chosen in the11th World Championships have a certain rule in time distribution:more distribution in the front and the middle of the time, less distribution in the behind of the time, at the same time, high and super high difficulties are gradually diminishing, Meet the physical ability distribution characteristics.C-A and C-C difficult combination are the main application form in the11th World Championships. The difficulty value of the front and behind difficult of C-A is higher than C-C0.25point, but the choice of type lacks diversity.The finish quality of the difficulties of jump and leap which are to be chosen in the11th World Championships is not high, the rate of loss fraction reaches to35.98%. The main problems include: twist is not entirely, the logs separate when need close, turn Steely; the feet apart when Fall into the front support.Compared with other Sports, there are certain gap on the technology development level of the difficulty of jump and leap in Women’s single and a Mixed; this is because of poor explosive and weak power of lower extremities of Women’s single.