1) Sit down on a flat bench by holding a pair of dumbbells in both hands. Keep the dumbbells resting on your thighs.
2) Bring the dumbbells to the sides of your body with your upper arm touching your lats and with your palms facing each other.
3) Exhale and push the dumbbells up forming a "Y" shape with your arms and your torso. Keep your back straight throughout the movement with a slight arch in your lower back and your chest pushed out. Push your shoulder blades back.
When you raise the dumbbells up, focus on activating your lats.
4) Inhale, and slowly lower the dumbbells back to your starting position.