Depending on the position of the pullover exercise that you choose, the pullover can provide primary cover for the following muscles:

1. Intercostals;
2. Serratus;
3. Anterior Delts;
4. Triceps.

Also, depending on your technique, these muscles can also be hit

• Pectorals;
• Latissimus;
• Rhomboids, Teres and Trapezius (but these in mostly stabilizing roles);
• Posterior Delts.

There are many options with pullovers, so many completely different pieces of equipment that you can use that you can just go ahead and class it as a full exercise group, rather than just thinking of it as a single movement.

You can consider it as a sort of a squat for the whole upper body.