Not much
The primary muscles involved in a pull-up exercise are the latissimus dorsi (back muscles), biceps, and forearms.
All of the required muscles.
latissimus dorsi
The muscles targeted when performing pull-up exercises are primarily the latissimus dorsi (lats), biceps, and forearms.
The best exercises to target and strengthen the muscles used in a pull-up are chin-ups, lat pulldowns, and inverted rows. These exercises focus on the back, biceps, and shoulder muscles, which are essential for performing a pull-up effectively.
your abdomen
muscles pull the bones up and down
ABductor muscles pull a limb away from the midline of the body. For instance, abductor muscles pull your leg up and to the side, farther away from the middle of your body.ADductor muscles pull towards the midline of the body. For instance, adductor muscles pull your leg back down closer to the middle of your body.
If its is an overhand pull up then its is the upper back muscles and the forearms. If it is an under hand pull up then it is mainly the biceps.
The best pull-up variations to target different muscles in the body are wide grip pull-ups for the back, chin-ups for the biceps, and neutral grip pull-ups for the shoulders and arms.
It takes many muscles to move the leg. It takes about 200 muscles just to walk at an average pace. Forty muscles are needed at a time to help pick up their legs.
a lot primarily: biceps Lats brachioradialis