So there we have it, all the isometric speed training stuff that pertains to golf.
Using this system, I have boosted my MAX swing speed from 127mph to 137mph. My average speed when I play is between 118-122 thereabouts. For guys that don't already swing at my speed, I would think that greater than 10mph gains can be made.
Forum members like jr33, nuke99 and vikram who have seen me swing in person attest to a "sudden acceleration of the club" on the downstroke.
That said, I do not use the exercises detailed in the book - only the theory behind it and the high tension rubber band that the company sells.
I substitute the exercises for something I feel is more golf specific. Besides, the author doesnt seem to be a golfer and makes some disgusting poses that masquerades as a golf swing.
All said, it helps to have forearms like mine ha ha ha...