If the show honestly bothers to address that, I'll be shocked. I stopped watching when we got that season three opening with him pain-free and jogging, because the ignoring details such as muscle loss there made it blatantly obvious to me they were going to go down the path of "House really isn't in that bad a shape, and he's just that fucked-up a person and if he fixes his head he'll be fine." I haven't heard one thing in anyone talking about the season so far to suggest any otherwise.