According to this article, weight gain is common after knee replacement.
It is hard to lose weight. As a compulsive overeater who is 10 pounds overweight (yes, even 10 pounds can be a problem), I now have to lose this weight. I put on 5 pounds with each knee. I'm short and can't handle extra weight. I have a 12 step program that helps.
I made an arrangement with a personal trainer and my goal is to go to the gym every day. I can already feel a difference after two sessions. One modality I like is the TRX and the guidance of a personal trainer has been valuable.
I realize I need help in losing the extra weight and getting toned and sought it out.