I am 53, and I had a bilateral knee replacement done on November 8th---everything is fine, range of motion is now at almost 115 for both knees, and I am driving and walking with only one cane. But sleeping is impossible! I have never been so frustrated! It is not that I am in pain, but I can never get comfortable. I get up, ride the bike, walk around the house, etc.---I am not sleeping with my wife now as I toss and turn. I finally get some sleep at around 5:30---9:30 AM ( I teach and have been on sick leave) I go back to my class room on January 3rd. I would give my left arm for a decent night's sleep! When does it get better?