Diabetes and other diseases with a neurological component can easily force you into physical therapy in order to recover or to learn how to deal with lost function. If you have diabetes, keep on eye on your feet and how they feel. Loss of sensation can result in terrible infections.
Physical therapy is often an unavoidable side affect of injury or surgery. While it may seem to be annoying, expensive, and time consuming, don't skimp on it if you need it; otherwise it might take much longer than it should to get back to normal.