1. Lie down on a flat bench with a dumbbell in each hand extended directly over your head
2. Open your arms to the sides in an arc, lowering the dumbbells until you feel a stretch in your chest. Keep your elbows slightly bent and do not lower the dumbbells below your shoulders.
3. Squeeze your chest muscles and bring your arms return the dumbbells to their starting position, following the same arc they took on the way down.