@carolasc : the main limitations are those issued by the orthopedic surgeon: no running/jogging, and no steep downhills. Either would put too much pressure on the knee - in the long run, certainly. I have on occasion needed to navigate steep terrain (in ski resorts, for example), no consequences, but I would not want to do this on a regular basis. It is irritating that it does not feel good at all to kneel with the TKR, even though there is no restriction for doing it. Other than that, I’m pretty much free to do what I want. I was lucky that I quickly got back to a very good flex/ability to bend the knee almost as much as the other one, and in spite of the expected painful aftermath I was driving myself to the grocery store within 8 or 9 days (as soon as I was off opioids), started walking short distances on the road on day 7. Ditched walker after 3 days, crutches after 5 (and those only outdoors, to guard against falls). Indoors no walker, cane, or crutches after day 4. Oh… it was my right knee, and yes, I was able to drive pretty much right away. Biggest problem was getting OUT of the car (Camry, so not a nice, high SUV).
Almost exactly 4 months after the TKR I was traveling, by myself, with a full-size suitcase, during the winter and snowy/icy sidewalks, and riding trains sometimes, during visit to family in Austria.