I do. I appreciate the advice, though. Fortunately, in a year or two, I'll be bad enough to have my knees replaced.

@DoDapper But meanwhile you can exercise and think if you do it you may not need that operation, would it not be better.

@Jolanta - I consider myself "lucky" at moment. I expected to need both knees replaced and one elbow and one hip before 30. I'll wait until the specialists I see say the time is come.

@DoDapper Don't "expect" it. That is negative thinking, and before you are 30, my god. Find some exercises, you can only try it and see how it goes. I manage mine with exercises every day. I only wish you a happy and pain free life.