Spending each day pushing awkwardly with one leg, squatting, swiveling the hips – it sounds less like fun and more like work.   I realized, however, my recent snowboarding trip could have very well posed as a health spa vacation. I don’t believe that calories are a good place to focus attention, but they can paint a useful picture.  Snowboarding on a mountain, at a moderate pace, burns about 558 calories per hour for a 205 lb. man.  We spent all morning and afternoon on our boards, but even a conservative 4 hours would burn 2,232 calories.  In addition to…