More about Stack and Tilt
When I look at what is being proposed with the stack and tilt method along with the number of positive testimonials, my curiosity, like yours is piqued.
I would be interested in hearing from anyone with a background in body mechanics that has looked at the spinal position at address and backswing. One thing that troubles me is the rotational forces that may be placed in the lumbar spine if the golfer does not have enough thoracic rotation available.
One possible biomechanical advantage of the stack and tilt is that it preloads thoracic rotation by imposing a thoracic curve at address via sidebending toward the target. There are two laws of spinal mobility called Fryette’s laws (I and II). Basically these refer to the principle that in the thoracic and lumbar spine, when sidebending occurs in one direction, rotation of the vertebrate occurs in the opposite direction.
At address, one hand must be lower than the other in order to grip the club and this naturally drops the non target side shoulder down. As a result the spine must either bend sideways or tilt from the sacrum. If the spine bends to the right (for right handed golfers) then the spine will rotate left which is exactly opposite of the direction that you need to rotate on the backswing.
By tilting at the sacrum, this sidebend is avoided and maximum available rotation is preserved.
However, as I understand it, this is different than the stack and tilt swing as described by its authors.
They refer to the tilt as something that occurs at the top of the backswing loading the target side rather then the trailing side as in the modern swing. The tilt that I refer to needs to come at the address.
Comments are welcome.
Steve McMurray MPT
www.ezgolfrx.com