Performing the: A Step-by-Step Tutorial Dumbbell Rear Delt Fly
Bend forward at the waist so your chest is leaning forward over your feet. Keep your back straight and let your arms hang straight down, palms facing each other.
Keep a slight bend in your elbows and raise your arms out to the sides until they're at shoulder level, like you're spreading your wings. This is the "fly" part of the exercise.
Pause for a moment at the top of the movement, then slowly lower the dumbbells back to the starting position.
Repeat this movement for your desired number of repetitions, remembering to keep your core engaged and back straight throughout the exercise.