 Those patients are super surprised. They can't believe that the pain in their knee isn't coming from actually inside the knee. But if you think about it, the feet are the base to your whole body. That's why she suggests personally fit arch supports. Emphasis on the personal fit. If you get something basing it just on your shoe size, it isn't going to fit you properly. And if it doesn't fit well, it probably won't work well. Go get arch supports fitted to you. It's as easy as going into a Good Feet store.