I do daily deep-water conditioning at the local pool. I use buoyant ankle cuffs, a belt and foam dumbbells for a hour-long resistance workout without putting undue strain on my bones.

I cycle a short distance (2K) to the pool pretty much year round (remember,this is Canada). In better weather I'm on my bike a lot, especially on weekends.

Walking long distances and running are too hard on my spine I find.