[YodasLuke]

Thanks for the reply. Do you know which PGA tour golfers allow their pelvis to slide to the right during the backswing. It is my impression that most PGA tour golfers pivot-rotate around a slightly flexed right knee and don't allow the pelvis to slide to the right. Some, like Ben Hogan, even push their pelvis left-laterally in the late backswing, causing even more left-shift of the lumbar spine, as the following photo series demonstrates.



Jeff.

I appreciate the 3-D of the hips that you posted. But, we are unable to see a 3-D picture of Hogan's hips.

I always have questions about 2-D pictures. Do we know that the camera was on a tripod or was it held? Do we know the distance from camera to golfer? Do we know the wind conditions and the trajectory on which the golfer wanted the ball to travel? Do we know the shot pattern required for the given hole? Do we know that the subjects in the background are standing perfectly still? In making so many assumptions about a couple of pictures, any hypothesis would have a hard time holding water.

It does look like his left hip relative to his fellow competitor has moved to the right, in the second picture. And, that could be attributable to many things.