Three-dimensional Kinematics Study Of Forehand Lob Technology Of Professional Badminion Players In Hebei Province

In badminton sport,the technique of lifting ball is used by more and more people as an important ball-control technology.This thesis mainly uses the method of looking up literature material and interviewing experts,three-dimensional kinematic video analysis,mathematical statistics method,logic analysis and the writer learns from previous research results about badminton smash technology,"principle" of flogging and " beyond the instrument" to analysis Hebei badminton team including five good badminton players in forehand drop spike straight,forehand drop spike slash,forehand splitting technology of three-dimensional kinematics analysis,reveals the athletes physical space motion law and the related parameters of each section,in order to provide theoretical and technical guidance for the coaches and the process of training athletes.(1)Ankle as lower extremity end link,the power process begins with a right ankle twist,following the knee,hip,shoulder,elbow,wrist and finally the racket,which in line with the action sequence characteristics.(2)The factors that affect the quality of lob including the vertical distance of the trailing distance net belt and the vertical height of the net belt along the net.And the distance from the ball the racquetball to the ground and the body center of gravity and the ground projection distance and the ball net moment with the vertical height and ball placement from mesh belt is inversely proportional to the net of the vertical distance,therefore the technique to complete needs each link to cooperate with each other and pay attention to the internal relation between each link.(3)Preparation for athletes in anticipation,three kinds of body postures of lob technology nearly the same,their bodies rotate about 90 degrees to the right and sideways facing the direction of the ball.The main purpose of the stage is to prepare for the next shot.Shot phase change of body gravity ups and downs,and shoulder joint,elbow overhanging Angle peak,175° and 135°,respectively,its purpose is to rob a high.With the wave phase,athletes use the body's inertia to "follow" to slow down the impact of the stroke to reduce the movement damage.(4)The maximum shoulder hip torsion Angle is greater than that of the forehand light sling and the forehand light slant.Right knee flexion range is more than his left knee,right hip rotation rate is greater than the left hip,lob techniques of complete relies mainly on the right knee muscles stretching to realize fast,and drive the hip "hip" action,form the right hip in front and left hip and movement principle of equipment in the "beyond the instrument".(5)In the process of the ball,the human body kinetic energy by the torso to the upper part of lower limb link the effect on the racket,delivery process to follow the fixed end link to nearly far fixed end link transmission rules.Three lob technologies in line with the "consistency" feature,preparation stage,the racket back stage before hand and hand with the swing phase,after the three strokes has high consistency,just at the moment,different technical movements in the wrist,the racket and ball contact area,cut bag in a different direction.(6)The technology of badminton is in line with the "whipping" movement principle,and the forehand cutting technique is faster than the forehand light slant line technology and the forehand light lifting straight line technology.The action characteristics of different light lifting techniques and techniques include the inner and outer rotation of the wrist joint in the shot,and whether the wrist joint can press down in the moment of the shot.