The "Lat Pulldown" is a phenomenal compound exercise for the back. It is performed by grasping the bar, a little bit further than shoulder-width apart, with either a pronated or supinated grip. ... Studies have shown that a supinated grip could possibly provide a more beneficial muscle load. Maintain an erect torso, with a slight backward lean, and pull the bar to (and slightly touching) the upper chest. While maintaining the same torso position, slowly extend the arms back to the starting position.
Major muscles involved: Latissimus dorsi, Teres major, Middle trapezius, Rhomboids
