AndromedaCassie's Journal, 12 Oct 21

If someone has been immobile in hospital they will have lost muscle mass. So they will require physical rehabilitation as well as dietary. It might be an idea to speak to a nutritionist and a physiotherapist first to get a solid base to start from. But very important to build back up as soon as one can. 

Absolutely what Anne said. Build up a good strong body. Whatever your friend does, it must not be just eat to get fat!