You will get a lot back. I was in my 60's. I have it all back and mine was really bad.Oh I've already learned what happens when you push the comfort margin a bit. Won't do that again, nosiree.
I'm not kidding myself. I'm almost 72 and severely injured my shoulder. I figure that is if I can get 75% of my gunction back and get rid of most of the pain I'll be tickled pink.