Nopurse, what you are describing is what my therapist has done every visit I have gone for for the last 5 weeks. There are several positions, on your stomach with leg up behind you, on your back with knee up in front, etc; the point to all of that they tell me is to stretch/tear/ break loose the scar tissue that formed post surgery. This scar tissue won't allow the muscles in and around your knee joint to move normally and, the doc and the therapists tell me it MUST be broken up. The so called 'manipulation' is done when the scar tissue is so heavy and strong that breaking it frree would be far above a person's ability to withstand. It does not solve the problem because unless the stretching is continued it will re-form. I think of it as like a scab inside my knee, you know how if you have a scab form over a wound on the outside of joint, say your elbow and you bend your elbow it will break open the scab because the scab doesn't flex; this is how I understand what is going on inside my knee. My PT says everyone has 'a point' that they will reach where the "scab" is broken away and frrom that point things get much easier. The problem is everyone's has a different 'point' and everyone has a different amount of "scab" to break. The doc told me everyone builds this scar tissue at a different rate and amount, thus everyone's experience with the breaking loose will be different. The only way I can tolerate mine is trusting the therapist and trying to survive. I yell so loudly in pain that the Dr.s in the offices next door have complained that it scares their other patients. I guess I'm causing them to loose business. I hate it. I wish I could be more helpful, but so far I haven't found any amount of Vicodin that works; prayer helps me, but there have been times that I have broke down and cried, sobbing, in front of everyone there. I'm a 52 year old man that thought I was a fairly tough guy, but the pain of this process and knowing that it is going to be done over and over until ?, is almost un-bearable on an emotional level. Some days I cannot help crying before they even start, just knowing what is coming. I can tell you, that my ROM has improved, but it is a slow and extremely painful process. Hang it there anyway you can, forget about being tough, and just try to survive. Remember, it won't last forever and it has to be done.