It’s a vicious cycle: You’re stiff, so you sit. Then you’re stiffer from sitting, so you sit some more. Sitting, my arthritic comrades, is our enemy. In warm weather or cold, we need to move to loosen up our joints. And — lest we forget — winter sports and activities are fun! Remember fun? So get out there and snowshoe and sled your heart out with these winter adventure tips.