Performing the: A Step-by-Step Tutorial Dumbbell Incline One Arm Fly
Lay back on the bench, extend your arm straight out to the side with a slight bend at the elbow, and hold the dumbbell up above your shoulder with your palm facing inward.
Slowly lower the dumbbell in a wide arc until you feel a stretch in your chest, keeping your arm slightly bent at the elbow throughout the movement.
Pause for a moment at the bottom of the movement, then use your chest muscles to raise the dumbbell back to the starting position in the same wide arc.
Repeat the movement for the desired number of repetitions, then switch to the other arm and do the same.