Motion Analysis of Golf Swing Using APAS (Ariel Performance Analysis System)

Abstract

Motion analysis of golf swings was made using a 3-dimensional computer motion analyzing system in 8 professional and 10 amateur golfers. The distance of movement of thecenter of gravity toward the shot line from the address point to the impact point averaged was larger inthe professional gorup, showing a much more shift in their body weight. In addition, twisting of both scapular zones and the pelvic zone on the backswing was larger in the professional group, suggesting the accumulation of power in the group. It is important to convey the accumulated power to the clubhead by an accurate chain of motion from the trunk to the periphery together with the shift in body weight. The difference between the angle of the left knee at the address point and that at the impact point was smaller in the professional group, showing the nessity of keeping the angle of the left knee at impact almost equal to that at the address point toenhnce the accuracy of impact. The direction of the scapular zone at impact was nearly parallel to the shot line in the professional group, while in the amatur group the direction was not constant and impact with the ball was not made straight on. For improvement, it is necessary to increase the strength of the leg muscle for firmly supportingthe pelvic zone, and the strenght of the paravertebral muscle and the muscle surrounding the scapular zonefor twisting the scapular zone. It is also important to cultivate a sense of timing to facilitate anaccurate chain of motion and efficient exercise of the muscle strength. © 2000, The Showa University Society. All rights reserved.