The abdomen is one of the most important muscle groups to exercise regularly because it does much of the work in keeping your lower back aligned correctly.In order to be successful at thinning your waistline you must have a basic understanding of how the ab muscles function and how your body burns fat.If your goal is to thin your waist line and have a nice flat stomach, the first thing you need to do is decrease / eliminate the layers of fat that are on top of your abs. Ab Makeover shows you the most effective way of flattening your stomach. It is a combination of strength training (with a extra focus on mid-section), cardiovascular exercise (short, hard workouts), and stable blood sugar (keeps you from adding additional fat and makes it easier for the body to use body fat for fuel). It also contains calorie intake and expenditure calculators.