I have never felt so sick during a workout! It is mental, and even though I just started yesterday boy it gives you the munchies lol. Legs day today, looking forward to a week of limping lol.
First two sets it's easy, as you get to set 6-7 you have second toughts about it although surprisingly set 9 and 10 are easier. I'm not looking forward to the DOMS, but being a well determined and I guess slightly masochistic person I shall complete this inhuman routine even if it's the end of me!
I tried GVT in January and had some decent gains in stregth even though I actually lost a bit of bodyfat because I wasn't eating enough. I've learned my lesson now, 4 solid meals a day, 2 shakes and a couple of healthy snacks, I'm not messing around!
Yeah my calories increase to well over 4k a day with ease when doing such an intensive program. It does fry the CNS so I leave a good 6 months at least between doing them.
It's not for the faint hearted, you get close to feeling nauseous at times - but as you say about the 6-7th set is the hardest. Especially those slow 4s negs especially during chins or squats make me feel it most.
It's mentally breaking for me, and sometimes getting the motivation to go to the gym is hard because you know the torture you're about to endure!