[Jeff]

DG

I am not sure why you started this thread, and I am curious as to whether you think that one can start the downswing with a lower body move and not one of those triggers. Ben Hogan seems to imply that the downswing starts with a lower body move in this video lesson, and he doesn't imply that he needs a trigger from either the right upper limb or right shoulder.

Now, although Ben Hogan doesn't apparently need an upper body/limb trigger, I can understand how one can use i) a right shoulder thrust downplane or a ii) right arm throw action to reactively trigger the lower body shift-rotation movement. What I would like to know is whether there is scientific/biomechanical evidence to indicate whether one trigger method is better than another method.

Jeff.