Dumbbell lying rear lateral raise

Lie face down on a flat bench with a dumbbell in each hand, palms facing each other. Extend your arms straight down towards the floor, keeping a slight bend in your elbows. Engaging your shoulder muscles, lift your arms out to the sides until they are parallel to the floor. Pause for a moment at the top, then slowly lower your arms back down to the starting position. Repeat for the desired number of repetitions.