Just because it’s freezing outside doesn’t mean you have to take your workout indoors. In fact, there are several ways to burn tons of calories while toning your entire body, all while making the most out of your winter wonderland. New York-based trainer Ramona Braganza, whose celebrity client list includes Ashlee Simpson, Jessica Alba and Halle Berry, gives LivingHealthy the lowdown on the five best outdoor winter workouts—including how many calories you’ll burn, which muscles are used, what to wear and tips to avoid injuries.