Lat Pulldown

The pulldown exercise is a strength training exercise designed to develop the latissimus dorsi muscle. … The cable lat pulldown is done where the handle is moved via a cable pulley, as opposed to doing pulldowns on a leverage machine.
The lat pulldown is a compound exercise, meaning it works several joints at once — and thus, several muscles. While the latissimus dorsi is the primary muscle worked, the biceps and muscles of the forearm act as helpers. Several of the muscles of the rotator cuff also assist as you pull the bar down.