my dad was fused. "classic" hunched over. He also had arthritic looking hands.
I dont know how long it took. it was also the 70's they had alot less meds to treat AS then.
He didn't like to do excercises.
So I am super vigilent about range of motion stretches as daily as I can remember.
Move it or loose it

Diagnosed Fibromyalgia 2004
Diagnosed Ankylosing Spodylitis Sept 2011.
Vertigo Since October 21 2012
Humira June 2012
Spending Each day using it to the full to help people in my community have hope, the only hope that keeps me going despite pain and fatigue every day most of the day.