The Research About Characteristics Of Muscle Work Of Slow Motion On Rings

Objectives：The rings are one of the items of men’s gymnastics, the set of ringsaction should be constituted by roughly equal proportion of swing andforce action. From the swing to the stationary force or from the stationaryforce to swing transition is a significant feature of the contemporarygymnastics. When do the static movement, requests the link static, cannothave big swinging it’s a high requirements for athletes to do the staticsexual strut movements and slow pressure action on muscle strength andcoordination. This research adopts three dimensional infrared imagecapture method, the methods of electrical method using computer andexploratory multi-rigid-body dynamics modeling and simulation system forrings slow force action of muscles of the characteristic carries on thecomprehensive research and analysis, for the rings in the slow forceaction to improve quality and provide theoretical basis for scientifictraining.Method:1Selecting gymnastics three athletes in jiangsu province for theresearch object.The cross bracing pressure of rings into horizontal crossbracing action3-d infrared image analysis, to explore the technicalkinematics law of motion2Synchronous electromyography testing was carried out on theexperimental object, preliminary exploration in the process of action tocomplete each stage of the selected muscle electromyography changesituation, so as to better grasp the power time, etc3Using the multi-body system dynamics simulation software toathletes in jiangsu province level line athletes YouHao techniques, tobuild cross support pressure in horizontal cross bracing motion dynamicsmodel, and combined with3d image analytic data, electromyography datawere analyzed。Result:1In the cross support phase, integral electromyography (iEMG) is thebiggest in biceps long head> pectoralis major triceps> the latissimusdorsi.In the Stage pressure, measured the muscles of the integralelectrical (iEMG) in turn is biggest in the pectoralis major muscle>triangle biceps saw before> muscle.In the horizontal cross support phase,the measured points in muscle electromyography (iEMG) maximum orderpectoralis> deltoid> serratus anterior muscle.23athletes of the antagonistic muscle groups have activation ratechange trend is basically the same, but Du Wenfei and two athletes thanYou Hao Meng Yongxiang, they have several groups was significantly greater than the total of antagonistic muscle activation rate You Hao.3The process of iron Cross pushing into level of cross,during theentire course of action,biceps, triceps, pectoralis major excitementlasts longest, and supplys biggest contribution.From the total activationrate and quality of finish on the pressure and horizontal cross supportphase, PM/LD ratio is lower, the lower the better, reducing the wastageof work.4From muscle tension throughout the process variation trends of themeasured muscle semg change in trends, trends of the two is basically thesame.Conclusion:1Cross support pressure in horizontal cross bracing movement is aseries of muscles around shoulder joint coordination of contraction.Major muscle is the biceps, triceps, saw, before the lower trapeziusmuscle, pectoralis major,the latissimus dorsi deltoid toe andinfraspinatus.2The iron cross, the main force supporting action muscles are biceps,triceps, pectoralis major and latissimus dorsi; pressure on the stage atthe biceps, triceps, pectoralis major excitement longest duration, thegreatest contribution. Deltoid, serratus anterior muscle iEMG increasesrapidly, significantly enhanced excitability, on the contrary, thelatissimus dorsi muscle iEMG amplitude of the pressure on the latter halfof the process significantly reduced. Horizontal cross bracing stage, themuscle electromyography case is the same as pushing up stage.3Pushed into vertical lever action is a slow process, in underpressure during hip flexion movements, body weight forward, in order toensure that the entire balance of the human body, his hands supportingrings and backward swings;Pressed into horizontal cross support onactions, medial adduction of the upper arm during a minor extensor of theHip-Hip flexion movements,difficulty with gravitational potential energydecreases pressure on the difficulty of the movements.4Combining dynamic model and analysis methods of electricityspeculate that down into horizontal cross bracing movement process, thepectoralis major muscle tension peak value in the first place, followedby the latissimus dorsi, upper trapezius muscle, biceps, triceps, deltoid;On the pressure into horizontal cross bracing process, biceps, pectoralismajor, deltoid, the latissimus dorsi (pressure on first half) is the mainforce of muscle and power source.