I had a total knee replacement operation on the 17 dec 2015. I was told I would be off for three months. Well, it`s the 10th 7 days before a full month and am driving and walking unaided and thinking of going back to work by the end of January. My doctor has said no one can tell you how you will respond to treatment and use my own discretion, Not bad for a 66-year-old.