No I haven't but I have thought about it. I'm 42 (not that it's too late) but between work, school, my son and all else I just don't have ENOUGH time to do that. I have dreamed of being able to do JUST school so I can really work on my physical strength and body work in general. I love running, playing tennis, going to the gym, and at my age, that's a good thing.
Yeah, exercise and sobriety have been good for me. I really would like to try one, I know I could do it.