Just as important as making smart eating choices while you're stuck indoors is staying active. Dr. Oz and Dr. Roizen are huge proponents of walking for at least 30 minutes a day. Even in cold weather, they say it's imperative to bundle up and hit the sidewalk. Or, in a pinch—or a blizzard—they recommend other ways to get keep your blood flowing.
Besides walking, there are other great ways to burn calories and stay in shape when you're stuck inside. Think you're too busy? Try these four exercises from O, The Oprah Magazine. They're perfect for any spare moment—you can even do them during a TV commercial.