It’s tough to find good reasons not to hibernate when the temperatures dip so low, but Time has come up with an excellent one for anyone who is working on their fitness. Researchers found that just exposing people to the cold activates brown-fat. Why is this important you ask? Brown fat can eat white fat that typically lurks around hips and other problem areas, and burn up t0 30% of the body’s energy while doing so. Thus, being out in the frigid temps can actually help to whittle your waistline. Just remember that when you are debating another Netflix marathon on the couch this weekend, or popping out to meet a friend.