In addition to my original bilateral total knee replacement surgery, I later required bilateral knee revision surgery, which was very lucky to *only* be replacement of the plastic inserts between the titanium bits.
If you are interested, PM me, and I'll write to you the regime I followed which left me in better shape following the surgery.
My friend, who calls herself Sapient Sue on CF, gave me some good advice
: to not think about what I cannot do now, but on what I can. It's a discipline, 'cause it's way too easy to sit on the pity pot.
Cheechako is right about the trifocals: the division places between the properly corrected bits can hide all kinds of foot traps. And after a TKR, you're told to never fall! HAH!
FWIW, progress is never as fast as we want it to be, so just keep on plugging along at your therapies, which at this stage are just to keep you from losing more muscle tone, which we lose because the pain makes us become more sedentary.
I'm afraid this all sounds kind of down, and I am sorry for that. I have to say that the knees I now have are better now than before either of the surgeries. I am able to get around, whatever the down sides.
Good luck with it all.