Dumbbells can certainly exercise the muscles of the back. The way to exercise the back muscles is usually to use dumbbell exercises, such as doing the attached dumbbell rowing action, you can also do the dips flying bird action to increase the strength of the back muscles, you can also do the up and side raises and other movements to exercise the back muscles. Before doing dumbbell exercises must first do warm-up work, to prevent the beginning of the exercise, due to muscle inactivity and muscle damage. When you do exercise, you must gradually increase the weight of the dumbbells and the duration of the exercise.