Do you wanna lose some weight fast? Then I highly suggest you go outside when the wind is ripping (like right now) and start walking! Your body will pump into action so fast to try and keep you warm. At the same time, once you start walking and getting your blood flowing, you'll be really warm by the time you get done. And you will have burned a ton of calories!
P.S. Just make sure to dress warm, and use lip balm!