If your exercising a client to the point of puking…um…well your an idiot! It fulfills the basic needs of a Neanderthal to feel macho about themselves. It’s outdated, dinosaur training. I would like to know at what point tearing down the nervous system is a smart way to train? Somebody please tell me, scientifically, why this is a good thing, other than macho, narcissistic stupidity!