I have zero chest expansion---none----the only thing that moves when I breath is my stomach. My doctor told me yesterday that I can get phnemonia easier because my lungs aren't moving in and out enough----makes you more prone to lung problems. Another possible aspect of having AS along with Iritis and Heart Valve problems is Pulmanary Fibosis---if you get that you have BIG problems. I walk at least 45 minutes EVERY day to help my breathing and mobility. The pulmanary fibrosis is an autoimune disease---(sound familiar)
