To Samba Advance WALK Step Of The Movement Biomechanics

Research Purpose:This paper applied research tools and the basic theory of the Sports Biomechanics，forImage analysis and plantar pressure test on the basic movements of the Wuhan Instituteof Physical Education professional class of eight outstanding Latin dance athletescompleted samba Advance WALK step.Research methods：Wuhan Institute of Physical Education of the Arts undergraduate students withoutstanding sports dance as Object of study Mainly USES Three-dimensional imageanalysis and plantar pressure test to carry out the testing.The main parameters include:(1)Displacement and velocity of the center of gravity;(2) Advance WALK step of all aspects ofhip, knee, ankle angle and speed characteristics;(3) related plantar pressure, the pressure.Combined with the measured results to analysis of the characteristics of action for athletes tobetter learning WALK pace technology provides the theory basis for action.Research results:1Advance WALK step in the whole process in the body center of gravitydisplacement makes small change in the Y axis,In the Z axis which the regular ofWave-shaped curve shows, Center of gravity displacement in the X axis directionfurthest to3.827m, The center of gravity displacement in the X axis direction closest to1.561m,2Advance WALK step of body gravity in Y and Z axis speed range almost zero inthe whole process. Faster speed in the X-axis direction, the fastest start speed of bodycenter of gravity to reach1.331m/s, start the slowest to1.281m/s.3Advance WALK step, the hip, knee, ankle of force leg, the Angle-time3D curve for thecommon characteristic is：From the preliminary pose stage to prepare forward stage，each joint Angle θ of force leg is from large to small, from stage of Ready to moveforward to stage such a force leg exchange. Each joint Angle θ of force leg is fromsmall to large. From a stage such a force leg exchange to ending θ from large to small.The Change Process of Angle θ is largeâ†'smallâ†'largeâ†'small.4．Preliminary pose stage of Advance WALK step, plantar foot pressure distribution in thefirst metatarsal, Pressure is360.3N (37.1KGF), Right foot plantar pressure distribution,Mainly in the forepaws inside, the thumb inside, The greatest pressure703.2N (71.7kgf);stage of Ready to move forward, Left foot pressure distribution in the thumb, Pressure is39.4N/cm2, The right foot pressure distribution in the thumb and the interior of the fourth metatarsal, The maximum pressure817.3N (85.2kgf);the stage such a force leg exchange, Right footpressure is933.8N (94.6KGF),the inside thumb pressure is46.2N/cm2.the stage of ending, Leftfoot pressure distribution, The maximum pressure616.6N (59.8kef).The main conclusions1. Body center of gravity displacement in small changes in the Y axis, Prove thatthe middle body of the eight students has a better ability to control. Body center ofgravity in the Z axis wavy shows rule change. This is a feature of Samba dance. Eightstudents in the X-axis displacement is different, the farthest distant is3.827m ofChenBaiZhou. Shows that the athlete action has a large liquidity, Good Physicalcoordination, The nice control capability of middle of body, a larger stride.2.Body speed is faster on the X axis, The fastest start speed of body gravityChenBaiZhou, start speed is1.421m/s, But throughout the course of action, the speed ofcenter of gravity were tested decreasing curve. This shows that the ability of maintainthe speed is poor.3The force leg of the eight students each joint angle in the Advance WALK stepthroughout the process, Angle θ is largeâ†'smallâ†'largeâ†'small.4Advance WALK step，Joint start speed of the force leg of the eight students isdifferent. Each joint of the eight students start speed in common: the Knee start speedfaster than the ankle.5Plantar pressure mainly on the front foot, thumb medial, The first metatarsal area,The fourth metatarsal area, Heel region bears smaller strength.