I've had experience with severely injured people, and they are trained on a case-by-case basis. No generalizations are possible, and no one will ever write a set of instructions. You'll just have to figure it out as you go, applying the general principles of stress/recovery/adaptation.
I've also had experience with sorry motherfuckers. My policy is to figure out what they are, to not associate with them personally, and to keep them the fuck out of my gym.