Twelve years ago, at age 62 I had bilateral knee replacements. Obviously if only one knee is bad you only get one done, but most people who need a knee replacement have suffered long term damage from arthritis or other degenerative conditions so if one is going bad, the other is probably not far behind. Rather than have to go through the therapy regimen twice, I had them both done at the same time. My orthopedic surgeon does only knees, and does hundreds every year. Personally I think that is a better way to go than using a general orthopod who only occasionally does knee replacements. Because I had both done at once, I went to a rehab facility for 10 days of pretty intensive therapy, followed by eight weeks of three times a week outpatient therapy. I strongly encourage you to not shortchange yourself regarding therapy. Just walking and doing the normal activities of daily living is not enough to give you as full a recovery as you are capable of. (I worked in the nursing home field for 23 years and I have met numerous foolish seniors who just flat out refused to do the rehab because it hurt, or was uncomfortable, or there were just scared of damaging the new knee, which is a foolish fear. Some of these folks ended up wheelchair bound for the rest of their limited lives.) The rehab is not fun, but knowing that it is moving you toward greater capability and usefullness of your knees makes it much easier to tolerate the discomfort. Before my knee replacements I could not walk 100 yards, with a cane, without having to stop because I was in agony. After the surgery I could (and still can) walk miles and miles without knee discomfort of any kind, ride my bike an hour a day, and ride my 900 pound motorcycle as much as I want to. The ONLY thing that is hard for me is getting down on the floor. I more or less lie down if I need to get down low, since I cannot, even now, tolerate the pressure of kneeling on my knees. Knee replacement surgery gave me my life back. Just don't be a wuss and you will not regret it, in my opinion.