| Access to searching literature to learn that the Zou Kai wonthe horizontal bar champion of the World Gymnastics Competition, hecomplete the connection an excellently, especially the connection to the"in-bar elements+flight elements". Domestic and foreign scholars havenot do kinematic analysis of a complete connection action. The model ofworld’s top athletes is a valuable model,and it can be considered areasonable technology that be in accordance with bio-mechanical laws andthe principle. In-depth study on the technical structure of the world’selite athletes Zou Kai`s action, find the characteristics and laws of thetechnical architecture will be an important reference value to technicaltraining practices. Therefore, its study has certain theoretical andpractical significance.In the horizontal bar final of the2011National GymnasticsChampionships, Zou Kai had completed a total of four "action+flightaction" connection in the bar. Among the action, stoop in shoot and1/2t.thr hdst.in ovgr and Markelov with legs together to be completed inrelatively good, the former coefficient of difficulty is in Group E, thescore is0.5and the latter difficulty coefficient is a Group D, the scoreis0.4points.Using three-dimensional video analysis of the connection action fromZou Kai, derived kinematic parameters, carry out a kinematics technicaldiagnosis to Zou Kai`s action, and established kinematic model by basedon the part that be in accordance with the gymnastics rules and BiomechanicsPrinciple. Demonstrated the biomechanical principles what have beenapplied,at the same time, Provided Zou Kai`s technical reference data forthe majority of coaches and athletes, to play a certain advancement rolefor improving technology for other athletes and rich horizontal barmovement theory.Through testing the action of from Zou Kai what have been done in Inthe horizontal bar final of the2011National Gymnastics Championships,and did kinematic analysis, obtained the following conclusions:Zou Kai didbetter when he complete the action of stoop in shoot and1/2t. thr hdst.inovgr and Markelov with legs together, in particular, the first loopbackon swing stage, wear stage, forward loopback stage, and the moment of doingnothing during the flight phase, he finished very well.But in the stageof stoop in shoot and1/2t. thr hdst.in ovgr,the twist angle is not enough,only329.58°, in the twist process, left and right hip angle is asymmetric,body skewed to the right, and appears to straddle phenomenon; in the airattitude of the flight phase,inclination change in the range of0.25s aftervacated the trunk is relatively lower limbs did not meet regulatoryrequirements,therefore, in the whole, Zou Kai`s air attitude is not goodenough. The hold time, elbow flexion were not meet the gymnastics rulesrequirement.At the same time, given Zou Kai`s technology model that conform the rules of gymnastics and sports biomechanics principle as follows:The action technology model of stoop in shoot and1/2t. thr hdst.inovgr:Zou Kai placed in the lowest point time of lap, his shoulder, hipand knee angle is170.43°,173.56°and170.69°, the horizontal velocityof center of gravity(Vx) is4.91m/s.Pocket leg angle is11.57°, pocketleg costs0.11s. Placed on the highest point just hip flexion moment ofthe pendulum,the height between body center of gravity and the bar is0.83m,the horizontal velocity of center of gravity(Vx) is-1.19m/s, shoulder,elbow, hip and knee angles are146.53°,150.36°,161.38°and157.97°; in the Wear stage, the lap time is0.71s, the swing time is0.32s. stoopin shoot the lowest point time about the center of gravity, shoulder, elbow,hip and knee angle are40.41°,175.57°,27.71°and177.01°, in themoment of right hand off the bar, body center of gravity height is0.40m,the distance from the bar is0.45m, the direction is the X positive direction.The moment of Zou Kai off the bar and grip bar on the right hand, the anglebetween center of gravity and the bar`s vertical line are25.01°and28.13°. In the whole twist process, knee angle ranges from167.31°to176.98°, the Inclination trunk relatively lower limb range from22.07°to41.69°.The action technology model of Markelov with legs together: in the hemprocess,zou kai`s maximum hip angle is225.27°, at this point, and theflat bar angle is24.57°; the minimum hip angle is127.43°, at thismoment and the flat bar angle is-34.96°, hip angle changes in the rangeof97.84°. In the lowest point time of hem process, the horizontal velocityof center of gravity(Vx) is4.85m/s, the distance between body center ofgravity and the bar is-1.08m, at the moment, the Shoulder, hip, knee andankle joint angles are177.41°,132.89°,174.02°and163.84°,whipping amplitude is83.46°; flight phase in the wash its hands of timeZou Kai`s horizontal velocity Vx is-1.75m/s, vertical velocity Vz is2.47m/s, center of gravity away from the bar`s height is0.73m, leveldistance from the bar is0.61m, the angle of hand to leave the bar is49.89°, at the moment, Shoulder, elbow, hip and knee angle are166.93°,169.20°,129.10°and171.64°. In the vacated phrase, the highest point ofthe center of gravity speed Vx is-1.67m/s, the height between body centerof gravity and the bar is1.04m, the center of gravity away from the barshorizontal distance is0.21m, knee angle is165.26°and hip angle is138.21°. The flight time is0.68s;at the moment of re-grip, shoulder, hipand knee angle are90.42°,130.95°and173.84°,at this point,thecenter of gravity of the horizontal velocity Vx is1.60m/s,verticalvelocity Vz is4.25m/s; the grip radius is0.57m, the grip angle of11.99°, the height between body center of gravity and the bar is0.12m, distancefrom the bar level is-0.56m. |
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