I am not a doctor, and I don't play one on TV, but exercise has helped me. Last week I ran 12.5 miles. I have been running for 19 years. I think I was diagnosed with AS 23 years ago. I was diagnosed with MS 2 years ago. I am still running (I havn't got there yet). Your situation may be different so I would say listen to your doctor, but I would get a second opinion.
