How can I effectively perform bent over Y raises to target my upper back muscles?

To effectively perform bent over Y raises for targeting your upper back muscles, stand with your feet shoulder-width apart, bend at the waist, keeping your back straight, and hold a pair of dumbbells in front of you. With a slight bend in your elbows, raise the dumbbells out to the sides in a Y shape, squeezing your shoulder blades together at the top of the movement. Lower the dumbbells back down with control and repeat for the desired number of repetitions.