Kinematics Analysis Of College Students' Field Killing In Badminton Backcourt

The purpose of the research is to acquire the kinematics data of the in-field killing of the special college students in the three-dimensional video camera,analyze the movement characteristics of the entire body-important joints in the in-field back-to-the-field ball-breaking action,and study the main factors affecting the in-field backcourt killing quality.Factors that reveal the spatial movement of the movement technique and improve the skill level of the movement.The research method adopts literature data and experimental methods.The experimental instruments are mainly two JVC-GC-PX100 professional high-speed digital video recorders,two tripods,and a three-dimensional calibration frame.The experimental subjects are six badminton students selected at Liaocheng University.Liaocheng University standard indoor badminton venue.When shooting,first adjust the height and focal length of the two lenses.The shooting frequency is 200 HZ.Before the shooting,attach the reflective stickers to the main joints of the subjects to be measured,support the three-dimensional calibration frame as required,and press the switch to make two when shooting.After the diodes flash at the same time,the athletes try their best to complete the technical movements.To ensure that there are three athletes satisfied and the test points are within the range of the backcourt,after shooting,the camera is connected to the computer and SIMI human motion analysis software is used to summarize the data,and the Origin software is used.The resulting data plot.During the research,the technical actions were divided into three action phases.Phase one: the athlete's preparation posture for preparing for the high ball in the back court until the athlete completes the process of side-by-side citation shooting.Phase 2: the athlete fully introduces the racket to the ball Process,Stage 3: The ball leaves the racket's swing process.The conclusion is:the completion of the ball-killing technique requires the coordination of the lower extremities and the upper extremities.The kinetic energy is continuously transmitted and produced.Each movement can influence the quality of the ball.The angles,speeds,andangular velocities of the right and left elbow joints during the swing shot stage are sharply increased;the order of the activities of the upper limbs is: trunk-shoulder joint-elbow joint-wrist joint,and it conforms to the whiplash type.The principle of technical movement biomechanics is that the right shoulder,the right elbow,the right wrist and the right hand are accelerated and braked in sequence.The speed increases progressively from the proximal sports link to the end sports link.The end sports link gets the maximum speed before hitting the ball;The torsion angle of the trunk differs according to personal habits.At the instant of hitting the ball,the position of the right shoulder and right hip is higher than that of the left shoulder and left hip;the heights of both knee joints are first decreased and then increased,and the knee joints are The angle is at the minimum at the time of completing sideways shooting;the height of the center of gravity will have two higher peaks,one in the lead phase and the other in the moment of hitting the ball.