Playing outside and getting fresh air is a great way to work out; but take heed... there are safety concerns. Winter workouts can be fun, exhilarating, and a real challenge.They can also be a great way for the whole family to get healthy together.There are, however, some precautions to take and things to know before you head out into the tundra.Dr. Angela D Smith of the American College of Sports Medicine shares the best winter sports, as well as workout safety tips.