The Kinematic Characteristic Analysis Of The Difficulty Difference Of The Butterfly Twist360°and Side Somersault Twist360°of Wushu

Ojectives:Difficulty movement is widely used in the arrangement of routine of Wushu with the characteristic of high"," difficult"," beautiful" in today’s competitive Wushu. The movement of B grade jumping difficulty of butterfly twist’s360degrees and the side somersault twist’s360degrees is two of these movements, it is a professional team to maintain the stability of a high level of general difficulty movement, also is the basic martial arts team to achieve more outstanding results of the common difficulty action. Careful people found, two movements in many places have similarities, but moves in a two learning and training and have a certain level of difficulty, generally feel side somersault swivel360degrees360degrees a butterfly twist a little more difficult. This research is from the sport biomechanics angle science reveals the somersault swivel360degrees really than butterfly twists360degrees hard hard after all, where, at the same time as the basic level team and martial arts enthusiasts learning and training the two action to provide certain theoretical guidance.Methodology:On the high level wushu team Shandong of Agricultural University of of11members and Shandong Sports Institute, national traditional sports professional martial arts class of39students conducted a questionnaire survey, their understanding of butterfly twists360degrees and360degrees side somersault twist difficulty of different feeling, and from Shandong Agricultural University high level wushu team drew3athletes in sports biomechanics experiment, through the two camera (Sony9800,50Hz shooting frequency, exposure time of1/250s) shoot out they completed butterfly twists360degrees and side somersault twist360degrees, then the filmed video measuring head minimum height, foot height, trunk and limb angle, trunk angle with horizontal plane and vertical plane (trunk angle), lower extremity and the horizontal plane angle (angle of lower extremity and vertical),Air twist around the body perpendicular to the axis of rotation angular velocity, trajectory, through kinematics perspective, explained two of difficulty varies, and then through the force plate for movement of the two jump the size difference, shallow slightly added two movement difficulty difference. Results:1, In its class difficult movements in Wushu, as more people get hurt, psychological role to complete this action, the influence is very large.2, The side somersault twist360degrees greater take-off power, but to make the body centre of gravity is lower, at the same time to ensure faster rotation speed, and the head is at the bottom of the foot on the top of the body, along the longitudinal axis of the body, therefore, the side somersault twist360degrees is more difficulty than butterfly twist the body control more to some, psychological effect is bigger.