Bull **** statement.. I had mine done 6 years ago. Did regular rehab, rode the bike, stair steppers, tread mills, walked the track, everything I was told to do.I even went to the gym on the days I didnt have rehab. Was even told I was doing to much. Kept having problems and even went to a different doctor. I wake up in the morning and my knee hurts. I go to bed at night and my knee hurts. I sit in my recliner and my knee hurts. To say someone has problems because they didnt work hard enough is just pure ignorance on you part. My sister had both knees replaced, Didnt do any rehab and doesnt have any problems, so that also goes to show rehab isnt the only answer. I wish I did have an answer, but I dont and two doctors dont, so my knee still hurts.