I don't even mind waiting 8wks for said release- but now I have my doubts that I'll recover even in 10wks if I continue to allow PT to traumatize my knee. So..
We usually recommend about 12 weeks off and then a
Phased return to work
Even a job where you are sitting most of the time is hard on a new knee. It's not just what you do while you're at work, but the added activity of getting ready for work and travelling to get there and back.
You may experience an increase in swelling and pain and could find that this happens:
Knee pain after sitting for a while
In any case, your knee will get stiff and you'll need to get up and walk around for a while, at least every hour.
If you're going to do your own exercises, do remember that it's not the exercises that rehab your knee and improve ROM. It's time to heal, reduction of swelling, and gentle treatment. The ROM Is already there, inside your knee, just waiting to reveal itself when the swelling and pain have decreased enough. You don't have to work to get ROM.
Like Josephine, I did no PT at all after my last TKR (and I only had 3 visits to PT for the previous one). I just let the ordinary activities of daily life be my exercise. Both my knees recovered very well. They are strong, have great ROM, and I can do anything I want to with them.
My surgeon does not allow any PT at all for the first month after a TKR and, after that, PT sessions are only one very two weeks. He says that your knee needs that first month to begin its healing.
His patients all do well and he hasn't had to do a manipulation (MUA) to help with ROM for the past 3 years.