Rotation center point is the cervical seven (C7) inner center dot. The least shift, the better results.
Written by golf scientist & coach, Tony, J. J. Wang.
This was Tiger Woods` swing sample at 1993-1996. His swing plane was one plane but over 90% of PGA coach or teach organizations gave wrong explain as down plane is lower than up plane, therefore, I must do this article for notice. In my used report about the swing rotation center shifting area, it cannot big over the driver face sweet spots area. Or, the distal swing plane is not a steady one plane and other bad results appeared like injuries occurring or un-precise impact appearing.
He got a perfect C7 high position when at the stance, it being kept the same high and went a little to the right until the top stage be returned the same position as stance. Actually, it was no need of moving to the right when at upswing.
During the down swing, Tiger`s c7 down for achieving the ground reaction force and then speedy back to the high as stance position for precise impact is a reasonable moving. But no need of front forwarding.
Result of this analysis remined Tiger with two topics. One is his good reverse C7 rotation at down swing to impact that the distal club head speed can be released and the other is not front forwarding the C7 too much so as the lower back injurie caused by the over side bending spine be avoided.