When I read about you all doing exercises I wonder how you do it. My husband has a severe case of Reactive Arthritis and he can barely walk! Am I to understand that most cases of AS are focused in the spine? Is this why you are able to lift weights and do other exercises? My husband used to ride a bicycle A LOT and ran several times per week. Now he can't even sit on a bike. He lifts very light hand weights to help in the extention of his elbows, but that is all he can do. I know that exercise is important for him, but it seems that all the suggestions are impossible for him. What can he do? Anyone else out there with Reactive Arthritis that involves the spine, shoulders, elbows, ankles, feet, neck...