the invention is a motion training method . the motion of golf swing will be emphasized . in order to guide a golfer through a proper swing , his / her swing must be analyzed first . to analyze the swing , a set of frame photos will be needed . from those frame photos , the invented method will provide a rule based method to calculate the body mechanics / forces of the golfer . once the body mechanics / forces are known , the system will then determine the swing is correct or incorrect . if the swing is incorrect , the system will then make suggestions to the golfer about how to correct his / her swing .