If You Play Golf

Five lines of green text with one line of red text between the second and third green lines on a white background. 

This button most likely refers to the “shoulder-tap test” in golf. The shoulder-tap test is considered the best way to determine the proper plane of the golf swing. To determine if the golfer’s plane is correct, the golfer keeps swinging the club back until it hits him/her on the shoulder, which indicates a proper plane. If the club taps the golfer anywhere else, such as the neck or the upper arm, the plane of the swing is too upright or too flat.