[Jeff]

12PB

I think that the baseball player is doing what golfers should do - release the PAs fluidly and efficiently and completely. HK's PA concept involves the arms and the whole idea is to fully release the PAs to the both arms straight position of full extension. The pivot initiates the process in a pivot-driven swing, but once the "left arm is blasted into orbit" (HK's phrase) the PAs should be allowed to release fully. A second firing of the hips and shoulders cannot (I think) add additional swing power to the releasing power accumulators (PA#4 => PA#2 => PA#3 in a swinger's action).

I think that the vertical force mainly applies to the lower body. One needs to apply a vertical force down the spine, down-and-through the pelvis, and down the entire left leg to brace the left side. A braced left leg and braced secondary axis tilt allows a golfer (and baseball player) to fully release the arms into full extension.

Jeff.