Good point.
But while you state that you will use little protein stores if any for energy output to repair, if you train and result in heavy DOMS...essentially you will produce the same. So, if the trainee happens to over-reach, causing any DOMS really you're using a) different motor units and/or b) no or delayed growth. I said a FB routine would be fine. However, stating "how often you train is dictated by how much stimulation/annihilation you give the muscles" is contradictory. If you over do it and cause the DOMS (as in sore for days after)...there will be little hypertrophy. Protein may not be used as an energy source, but energy will be used to repair the muscle cell membranes (sacrolemma), first, then hypertrophy. Which is far more lengthy, making gains delayed. That or you simply executed different fibers.
I also don't think people who use split work focus on their entire body. Deadlifts are a compound exercise but the load put on each muscle doing the lift differentiates. The load placed on the legs/lumbar/back, etc are far stronger than that on the biceps. They are a supporting mover.
Tim definitely see what you're saying. I think, if I'm understanding correctly that muscle atrophy in 2 days won't be very much as long as you maintain your calories and remain active, which shouldn't be a problem. And sorry for the incorrect hours of atrophy, I remembered it being around those numbers.
Again I may be off base, but debating's are how you learn!
