Quantitative Analysis On The Movement Structure Model Of "Straddle Leap 1/2 Turn To Push Up" In Sports Aerobics

Generally speaking,in sports aerobics competition,the difficulty of movement that the athletes choose is mostly focused on the score of 0.4 to 0.7;high difficulty movements is also under arrangement,but in low density.The correct choice and the success rate of execution of difficulty elements is non-ignorable high scoring problem and one of the crucial factors influencing on the results of the competition as well[1].With the continuous development of sports aerobics,the requirement for difficulty movement on athletes is higher and higher.In order to win the game,it is necessary to challenge the higher difficulty elements.In this paper,we study of the movement "straddle leap 1/2 turn to push up" in Group C-jumps and leaps.From "Straddle leap to push up"(0.5 points)to "straddle leap 1/2 turn to push up"(score 0.6)to "I/I turn straddle jump to 1 arm push up or Wenson push up"(score 0.9)etc.,to movement patterns,it's increasingly difficult.Among numerous training and competition,a series of movement "Straddle leap to push up"is frequently used for high scores.However,there is a problem that mainly displays in:1.Cannot be completed;2.Completed but in low-quality.On the basis of two articles,Discussion on Adjustment of Movement Structure Model and Technical Deviation of Gymnastics[2]&Discussion on Gymnastic Technology[3]by Yu Lianghua,this paper set up the movement structure model of "straddle leap 1/2 turn to push up".According to the movement structural model,by using the research methods of sports biomechanics to quantitative analyse the technical actions,we help athletes realize theoretically the movement of "straddle leap 1/2 turn to push up",so that conducive to the series of actions will be done in high-quality during training or competition.Through using the methods of literature consultation,specialist interview,video analytic,experiment,mathematical statistics and comparative analysis,and so on,this paper carried on quantitative analysis of the movement structure model of "straddle leap 1/2 turn to push up",based on three college students Mrs.Cui,Mr.Tan,and Mr.Yan,and drew the following conclusion:1 From the content of movement technical structure:We established this movement structure model.Elements can be divided into 3 stages:take-off,airborne,landing,which can be subdivided into 9 techniques.As for the 9 techniques,it including many technical details.And for the first time,made quantitative analysis of each elements technology,as well as the support of these technologies at the next lower level subsystem-the technical details.2 From the presentation of movements technology:Mr.Yan showed correct technical composition in the take-off phases,and advanced technology in airborne stage,but some incorrect technical in landing stage.However,Mrs.Cui and Mr.Tan showed some correct and incorrect technology at different levels,without compensate for technology in three stages.3 Take-off technology in the movement structure model:Mr.Yan's sinking,stretching,swing arms techniques is the best.His buffer sinking time is 0.28s,stretching time is 0.16s.Maximum Buffer time around knee joint Angle is 108.1 ° and 108.94 ° respectively,stretching from the ground instantaneous velocity of the center of mass is:2.27 m/s.Mr.Tan and Mr,Yan's take-off speed is faster,while Mrs.Cui is relatively slower;Feet-off the ground,Mrs.Cui's arms are in the lower left corner with smaller oscillation amplitude;Mr.Tan and Mr.Yan's arms are of upper left with bigger oscillation amplitude.Mr.Yan's maximum peak force is 1266.99 N at take-off stage,Kmax=2.05,and his standardized force curve is in the shape of parabola;Mr.Cui and Mr.Tan's force curve is of a sudden start and the abrupt end.4 Airborne technology in the movement structure model:Mr.Yan's swivel,pressing the chest and place leg technology is the best.Swivel times for Mrs.Cui,Mr.Tan and Mr.Yan are:0.68 s,0.74 s,0.82 s;In the process of swivel,Mrs.Cui and Mr.Tan's arm primarily to stretch below extend,no upward orientation,but Mr.Yan's arm stretches above.During the Straddle jump,the maximum Angle of Mrs.Cui,Mr.Tan and Mr.Yan is 119.72 °and 128.22 ° and 133.83 ° respectively.Mr.Yan showed a good flexibility.In airborne phase,the minimum hip Angle respectively is:Mrs.Cui(73.79°,114.85°),Mr.Tan(54.93°,86.88°),and Mr.Yan(39.53°,39.53 °).As a whole,Mr.Yan is of the optimal hip Angle and advanced technology.The rise height of the center of gravity for Mrs.Cui,Mr.Tan and Mr.Yan is 0.27m,0.38m,and 0.29m.5 Landing technology in the movement structure model:during the landing stage,Mr.Yan used hand to hold to the ground,clip elbow crank arm buffer technology,which is very correct,but landing before the body has fully expanded,rendering 165 °hip Angle;Although Mrs.Cui landing with arms first,but also with a 145 ° hip Angle,and mistake technology of the whole body touches the ground;Mr.Tan's foot touchdown first with a 166 °hip Angle,and open the elbow crank arm cushion,the landing error technology is obvious.