In reading this thread to learn more about TGM, I noted that Yoda stated in post #53, #56 and #61 that the lower spine moves away from the target at the startup of the backstroke. Surely that is wrong.
Doesn't the lower lumbar spine move towards the target as the golfer pivots over the right femoral head in the backswing?
Here is a diagram showing the movement of the right femoral head in the backswing pivot action - it moves backwards and leftwards. That causes the lumbar spine to move slightly leftwards, although the face-orientation of the lumbar spine becomes increasingly rightwards.
Jeff.
It depends on the type of Hip Turn. If you agree with Homer and believe that there should be a Hip Slide or shifting of weight prior to the Hip Turn (10-14-B) and that there's a Stationary Head, then the base of the spine would be moving away from the target in Start Up.
The diagram that you've used would assume no weight shift and a single axis of rotation. (10-14-C)
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.
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.
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If you cannot take the shoulder down the clubshaft plane, you must take along some other path and add compensations - now, instead of one motion to remember, you wind up with at least two!
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