I had my TKR on Friday of last week. I seem to be doing well, although my knee badly swollen and sore. Pain killers ( Codeine) not doing much at all. I was discharged from the hospital yesterday, but very concerned that the Physiotherapist kept stressing I have to be aware of how important it is to achieve this 90 percent movement in my knee and to keep up the exercises. I appreciate the point here, but surely if badly swollen and more to the point painful, how can I physically achieve this so very soon after the operation? I am starting to get nauseous as I attempt this movement yet again. What is the average time to achieve this please. I am 72.