Staceysue: Ditto, I get the same benefits from cycling, especially the sinus clearing. I have to be honest though and admit I don't bring a handkerchief or anything.. I just blow into the wind. It works quite well.

I have back issues too and for my lower back I have found riding helps. Being in that low position in the drops is kind of like being in traction.. it really stretches out my lower back and (knock wood) my back is much better than it used to be.