Pull-ups are a key exercise for developing strength, targeting all major muscle groups in the upper body. Involving multiple grip muscles in the arms and forearms, pull-ups activate the latissimus dorsi, trapezius, biceps, forearm flexors and extensors, abs, and deltoids.

Different types of grips for pull-ups allow you to change the load on different muscle groups. For example, a reverse grip emphasizes the biceps, while a wide, forward grip activates the latissimus dorsi. This is a multi-joint exercise that requires the muscles of two joints to work together, which makes it complex and effective for general physical training, JustSport reports.

Pull-ups also help strengthen your arm muscles, which is useful for everyday tasks, and require the participation of the midsection muscles to provide stabilization during the exercise. The deltoid muscles also receive a load, strengthening during pull-ups.

This exercise not only builds strength, but also creates an attractive shoulder contour, making it an important component of physical fitness.