Synopsis: You metabolism is the key to changing your body! By increasing muscle mass in your body, you really can increase your metabolism and burn more calories all day long - even when you're at rest. This workout combines muscle-building compound strength moves with cardio activity. That's the perfect formula for slimming down with a calorie-burning blast now, and a big boost to your metabolism long-term. Get ready to build endurance, sculpt sexy muscles, feel fitter, and have a body that you're proud of.