No it is not for sissies! but hang in there. I had both done four months apart so I know the pain, PT pain, sleepless nights, the stiffness and radiating pain where you cannot get comfortable and you can't sleep on your side. Once you get through this fire swamp of recovery, you will be so glad you did it. I do aqua aerobics a few times a week and that strengthened my legs. I can go up and down stairs and walk all day without pain. Don't loose heart. You will get there and it will be great.