This is a wonderful and highly informative forum - thanks to all involved in sharing their experiences as well as those who offer their opinions. After a total of 6 arthroscopic surgeries, I now have no option other than to have both knees replaced. Because I live alone in a double story home with stairs, I need to decide whether to have both knees done at the same time or to have one done soon and the other some time later - perhaps 6 months or more. If I opt for BTKR, then I will have to spend some time (perhaps one week?) in a rehab facility after leaving hospital. Whilst I am able to live on the lower level of my house (I have all of the facilities that I require on the lower level, except for a shower) I would welcome comments from those who have had to make similar decisions. Essentially what I need to know is how long it took other BTKR patients to be able to successfully navigate stairs (with and without crutches) after BTKR. In terms of fitness, I am a 70 year old healthy fit male and my BMI is good. Another concern that I have with BTKR is that the muscles in both legs will waste away after surgery and that the recovery of these muscles could be a long and frustrating process. I get the impression that replacing one knee at a time is likely to mean that the muscle in the one "good" knee will support me during recovery and make the whole recovery process quicker and less frustrating, especially because I live alone and have stairs to navigate. I look forward to hearing of the experiences of from those of you who have been in similar situations.