Set an adjustable bench at a 30-45 degree incline angle.
Lay face down with your legs straight out behind you, head hanging over the top of the bench and neck in a neutral position.
Hold onto a pair of dumbbells with your palms facing in, and then row them upward toward your midsection until you feel a strong contraction in your back muscles.
Lower the dumbbells back down until your arms are fully extended below you and repeat.