I am 8 days post op from a total knee replacement. Some of the exercises recommended to me before leaving the hospital included lifting my foot while having a small pillow under my affected knee; another was to lift my leg from the hip. Repeat 10 times, 4 times a day. I have to use the gait belt to lift my leg at all. From standing, I am able to lift my leg slightly. I am 55 years old and had strong muscles in my legs going into this surgery. Is this normal? I feel they wouldn't recommend an exercise I will totally fail at. My first follow up is in another 5 days.