Down time is sort of up to you although six weeks before you are totally free sounds about right. I counsel strict compliance with the rehab schedule. If you don't, the new knee will severely limit range of motion to far less than 90 degrees. In her case, she was extremely flexible, what we used to call double-jointed. She can still kiss her own toe on the left side but her fake knee side only allows about 100 degrees of motion which is as good as it can get on anyone.

They also told her to avoid jumping on it ever. On the positive side, in my job as a medic in my previous life, I have come into contact with many who have had knee and/or hip replacement surgery and they all loved it and were sorry they waited so long.