The main Lat Pulldown muscles worked are:
- Latissimus dorsi
- Biceps Brachii
- Teres Major
Although the Lat Pulldown exercise trains most of the muscles in the back the main Lat Pulldown muscle worked is the Latissimus Dorsi muscle.
I have created a full 3D Model Animation of the exercise below so you can visualize the correct exercise form and the main muscle in action!