Yes TKR can be tough on some people. For those considering TKR, take time ahead of surgery to work with a trainer and get in shape. Not just legs but core and upper body. You'll need strong triceps after surgery, trust me.

And start the PT immediately after surgery. Nothing is more important. Lost time cannot be made up. First the PT will work on ROM and later on strengthening the quad and hamstring.

Best wishes to any and all contemplating TKR. For me, it's been life changing!

Joe