Your back muscles are involved in just about every activity you do, it is important that they're strong enough to handle all that work. Training your back muscles will add muscle mass to your upper body, which can help make your waist look smaller. Like your chest, your back is made up of big muscles that can handle heavy weight, help you burn more calories. you can perform back exercises up to three non-consecutive days. For this reason, you might only work your back once or twice a week.
