A friend of mine had his knee replaced. He's 72yrs old. Everything is wrong with him, honestly. But he was walking one week after. His Doc told him to take it easy. That was a year ago. You can,t tell by the way he walks that he has had a knee replaced. But its still not like having your own knee. You have to learn how to do things differently. But I guess its a lot better than having pain every day, all day.