My TNR was four months ago. Now I'm golfing and bicycling. Orth Surgeon says no running but doubles tennis is OK. Other activities are all allowed.
I find if I sit for a long period of time (movie), my knee gets a bit stiff and sore, and I need to take a few minutes to stretch it out. If I overdo the exercise and work my knee too hard, sometimes it puffs up a bit and needs to be iced.
Despite my original whining about the pain after surgery, it was worth it, and I'm glad I had it done!