Sit down on incline bench with dumbbells resting on your knees. Flick dumbbells to shoulders and lean back. Position dumbbells to sides of chest with upper arm under each dumbbell.
Press dumbbells up with elbows to sides until arms are extended. Lower weight to sides of upper chest until slight stretch is felt in chest or shoulder. Repeat.
Dumbbell should follow slight arch pattern, above upper arm between elbow and chest at bottom, traveling inward over each shoulder at top.