It guess it depends on all the variables. But I must say again in simple terms that intense work to much of the time throughout the course of weeks will start to make you burn out, no matter if you "take a protein shake during training" no matter what a person thinks. You still have to take into consideration the nervous system, which also gets taxed during intense training, and takes much longer to recover than your muscles glycogen stores, or your muscles themselves.
Look, all I'm saying is that I don't think running 3-4 times a week will give him a cut look if that's what hes going for. It'll help him lose weight, that's for sure, but I can alomost guarantee, that he won't quite het the exact results he's after, hence I wen't that route before, and didn't get what I wanted either, and I know many other traininies who experinced the same. Some might get the what their after through this method, but then some people's genetics are simply diff. And if you think of the advice, I really don't think doing sprint's 2x week to start is bad advice for fat loss, if you think about it.
Question kane. Are a trainer possibly? If so you can give me advice in my training routines when I post it in the training section, since you seem more than happy to oblige.