Usually you can practice with two heads behind. I suggest you have one big muscle group and one small muscle group at a time.

Because of the back exercise, many times, the two heads also exercise with strength.

If you have to practice your back alone, you can do more actions. After all, one movement is too monotonous to fully exercise the back muscles.

Recommended movements include holding dumbbells, rowing and pull-ups.

In addition, if you have time, I suggest you do hard pull and squat, which will greatly improve the muscle growth of the whole body.