It seems like we all have different responses to the surgery, at least in part because of different techniques used. After my TKR my thigh had that numb, heavy feeling for weeks! It went all the way down to mid-calf and all the way around my leg. The sensation gradually changed. Now, 16+ months out, I still have the heavy sensation in my knee down to about mid-calf, and mostly on the outside of my leg. I wish it wasn't there, but the increased strength in my leg and knee makes it worth it.