Whether you’re working out with a DVD, carrying a sleeping toddler or simply sitting at a desk or in a car for long stretches, you’re depending on your back for support and mobility. Yet the back is one of the most neglected exercise areas, because many of us train only what we see in the mirror—the front of the body. But nicely toned back muscles not only make you look better, they’ll improve your posture, and protect you against bothersome backaches or painful injuries. Try these three strengthening exercises for the low, mid- and upper back to enhance your body’s total appearance and increase your everyday health.