Research And Analysis On The Kinematics Characteristics Of Golf Shot Under Three Different Ball Positions

With the successful debut of China Golf in the Olympic Games,it will usher in a new opportunity for rapid development;it will gradually be accepted by more and more people in the country,and more and more people will join the sport.The purpose of this paper is to understand the technical characteristics of amateur players in dealing with high and low ball swings,and to compare the technical movements and impact effects of high,low and flat earth hitting,and to find the factors of the effect of amateur players hitting the ball at high and low positions,making it easier for amateurs to master the key points of the technology and improve the hitting performance on high and low ball positions to provide scientific reference.In this paper,12 male amateur golfers on the right side of the swing were used as the experimental subjects.Two iphone 6 slow-motion camera functions were used to collect the swinging technical movement of subjects under the ball position at different angle at 120 frames per second,and uses the three-dimensional analysis software Simi Motion video to analyze and synthesize three-dimensional kinematics data;use Trackman third-generation golf radar to synchronously collect Flight data of every shot ball on three different ball positions.Through the analysis of the kinematics data of the high and low ball swings,hitting the ball in the high and low ball positions,the posture shoulder axis is ready to point to the adjustment,the high ball position to the left and the low ball position to the right;the body bending angle is based on Adjustment of the ball position;adjustment of the roll angle of the trunk in the low ball position;in the case of the high ball position,the station width becomes larger;the plane angle of the club is adjusted according to the change of the gradient,and the forward inclination of the club is increased.At the top of the apex,the rotation amplitude of the shoulder axis and the hip axis increased and the low spherical position decreased.There was no significant change in the shoulder and hip separation angle.The change of the forward angle of the trunk decreased in the high ball position,while the low ball position increased.The angle change value increases.Both knee joints have increased in angle of change.The center of gravity of the human body increases the displacement of the high ball in the fore-and-aft direction and decreases the level of the low ball.In the process of moving up and down the lever,both the increasing and the decreasing amplitude of the center of gravity decrease in vertical direction;the left and right directions in the high ball position increase the right of the lever period.The amplitude of the left side of the downswing period decreases,the amplitude of the right side of the downslope decreases,and that of the left side does not change significantly;the maximum speed of the center of gravity moving to the left decreases while downswing,and at the moment of maximum speed,approaches the moment of Hitting the ball.The proportion of time spent on the swing rhythm increases and the duration of the transition period decreases.The order of exertion of the body's various stages during the transitional phase and the downswing phase does not change,and the time interval between the start of the shoulder and upper limbs decreases.At the moment of impact,the shoulders point to the right of the shoulders at the time ofpreparation,and the low-segment angle is greater.Both the forward and the lateral changes in the angle of the trunk were reduced.The change of the angle of the left knee of the high ball position increases,while that of the low ball position decreases.The error of the high ball position in the anteroposterior direction of the center of gravity increases while the low ball position decreases.The center of gravity increases,the high ball position increases,and the low ball position changes little;the center of gravity shifts to the left.Through the analysis of the flight data of the high and low ball swing ball,the distance between the high ball and the low ball is reduced,and the high ball is more significant;the high ball head speed and the efficiency of the ball are reduced and is highly positively correlated with The change in head speed,while the change in low ball pitch distance is highly positively correlated with the change in head speed,and the efficiency of the ball is reduced slightly.The high ball position at the takeoff angle increases while the low ball position decreases.The inverse rotation high ball position decreases and the low ball position increases.The initial direction changes are not obvious,and the overall presentation is more rightward;both of them are highly positively correlated with the change of the club face angle and the head trajectory.The rotation axis of the highball is easy to bias to the left;when the lowball is low,the rotation axis of the ball is easy to bias to the right.Through the discussion of the swing ball movement and the impact effect,the change of the club head speed is due to the change of the body rotation ability,the change of the power transmission efficiency caused by the change of the body stability,and the insufficient launching force of the lower stroke;The change in efficiency is due to the adjustment of the body's bending angle and club angle in preparation for posture,and the change in body stability during the swing;the change in direction of the club head movement is due to the adjustment of the orientation of the shoulder axis to the preparation posture,the change of amplitude in the body rotation,and the change of force characteristics during the swing;the change of the face orientation is due to the adjustment of the angle of the club in preparation for the posture,the change of the force characteristics during the swing,and the changes in the degree of rotation of the shoulder shaft resulting from the change in the height of the ball in the time of the impact.