@artscaping I exercised a lot to prepare for my second TKR. It got delayed for a couple of years due to other medical issues so I had plenty of time to get in better shape, and to lose some weight. After surgery I just followed instructions. My doctor also insists on gentle PT. I don’t think I exercised quite enough though because my flex is actually reversed after I lost my in-home physical therapist.

I think the most important thing to do if you are planning to have a TKR is to find the best possible surgeon you can find who uses the most successful methods available. Things have evolved a lot in the last few years.
JK