Grasp two dumbbells and lie on an incline bench face up. Extend your arms up with your palms facing each other. Bend your elbows slightly and keep them fixed throughout the exercise.
Keeping your arms perpendicular to your torso, slowly lower the dumbbells in a semi-circular motion, until your arms are in parallel with the floor.
Slowly raise the dumbbells along the same arc back to the starting position.