I'm with you.  My ex's deceased grandmother was pretty fat. Probably obese, in fact.  (She's been dead for years).  She had a fall and broke her hip.  Had hip surgery and used a wheelchair while she recovered.  She healed up and flat out refused to walk again.  She wouldn't do PT, would barely stand up to get into her (medical) bed at the nursing home.  She.  Just.  Stopped. Wanting. To. Walk.  I mean, she was really old at 94, but still!  His other grandma was a shiltady to the end and was embarrassed and frustrated by the fact that she needed to start using a cane for long walks at the age of 95.