Dumbbell rotation reverse fly

Stand with your feet shoulder-width apart and hold a dumbbell in each hand, palms facing inwards. Bend your knees slightly and hinge forward at the hips, keeping your back straight and chest up. Raise your arms out to the sides, keeping a slight bend in your elbows, until they are parallel to the floor. Rotate your arms so that your palms are facing downwards. Slowly lower your arms back to the starting position. Repeat for the desired number of repetitions.