[Jeff]

I just had a "great find" experience on U-tube - an overhead swing video view of great golfers. That allowed me to study their hula hula flexibility.

As you can see, they all have great hula hula flexibility.

Here is their end-backswing position.



I placed blue dots over L5 and C7.

Note that all the golfers have-:

1) A good pelvic rotational movement in the backswing.
2) That pelvic rotation causes their lumbar spine to have a rightwards orientation.
3) A large shoulder turn that torques the mid-upper thoracic spine, and verticalizes it.
4) Rightwards tilt of the spine and the upper torso thereby producing a reverse K position at the end-backswing.

Jeff.

p.s. Side-issue - It's interesting to see how much Palmer's left foot rotates during the followthrough/finish phase of his driver swing.