While doing cardio will help you burn calories and increase your metabolism weight training will help you build lean muscle ensuring that you keep on burning calories long after you've worked out. 'When you start training regularly with weights your muscles develop become denser and burn more calories all day and night. Though cardio is a great way to assist in fat loss it burns fat only while you're performing the exercise not around the clock. Lifting weights and adding lean muscle on the other hand turns your body into a full-time calorie-burning machine. If you were to add just