Weather keeping people indoors

Don't become one of those indoors folks because of the weather. Even on these bitter cold days, try and get outdoors for some fresh air and a chance to move around more than you get going from the Lazy-Boy to the fridge.
Be sure and dress warmly keeping exposed skin covered.  And stay out for a few minutes at a time, with the idea of going out several times a day in brief chunks of time.
While cross country skiing and snow shoe participation are up with all the snow, in the bitter cold only the die hard, very committed people are out on the trails.
Besides getting some exercise and fresh air, you'll be getting that much needed vitamin D if there is any sunshine, all helping to ward off season affective disorder (SAD).

At any rate, stay active, but be warm while you're doing it.