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Originally Posted by brianmanzella
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Good points, Marty!
Try this experiment:
Have a pal hold your head dead still.
Have another hold a finger BARELY above the base of the 'neck bone.'
Make a backstroke.
What happens?
The 'neck bone' moves WAY forward.
What is that, reverse swaying?
I don't know what it is exactly, but it is NOT rotation about a fixed point...
'cause the point is MOVING.
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Guess I don't know where the neck bone is, cause yes I can feel the outside move, but it is rotating around. At issue is where is the center point and does it move. Is it the 'thoracic spine rotation center'? Now I did your test sitting down, I was attempting to minimize any movement other than the shoulders, don't know if that will make a difference.
The more I read what you write, I guess I am of the opinion that you don't subscribe to 1-L-1/2 cause you keep introducing movements and seem to be supporting your position that even the base of the neck movement is not only permitted but desired.