Yes. Hospitals want you to get moving right after surgery, in part to prevent blood clots from forming. What I don't get is why Rob remains in hospital. When my wife was in the process of getting her cancer colon diagnosis, the procedures were basically in-and-out. She had overnight stays a couple of times when she landed in emergency with crushing pain before the docs figured out what was wrong. (They initially suspected gall stones.) Concerns with Rob's history with drug use have been raised, and are plausible. Or maybe the docs are thinking he may need surgery pronto, once they've confirmed the diagnosis and they're working to get him in shape for that. I image surgery on someone of Rob's size, combined with other health issues he may have, would be a challenge.