My first answer was rather short. This site is very helpful. You will realize that everyone is different. Many will come up with other auto immunes or have others already. There is no one set of answers. But keep educating yourself and asking questions you will become an advocate for yourself. My PMR did burn out in 6 months. I had two flares that were easily treated in the first year. I have had no symptoms the last 3 years. The sooner you can be off prednisone the better or at least more normal your health will become. Although at 73 , while I am still very active as yourself, it is not getting any easier.