Benefits:
Increases flexibility of the pectoral muscles, mainly the clavicular head. It also contracts the anterior head of the shoulder, the serratus anterior, pec minor and the triceps brachii.
Movement:
Sit on a bench with an angle of no more than 60 degrees. Grasp the dumbbells with an overhand grip. Inhale and extend the arms vertically, bringing the dumbbells together. Exhale at the end of the movement and return to start position.