A pull-up is a strength training exercise that targets the upper body, particularly the latissimus dorsi, biceps, and shoulders. To perform a pull-up, an individual hangs from a horizontal bar with an overhand grip and pulls their body upward until their chin is above the bar. This exercise can be done with various grip styles, such as wide or narrow, to emphasize different muscle groups. Pull-ups are often used in fitness routines to build muscle and improve overall upper body strength. They can be challenging for beginners, but modifications like assisted pull-ups or using resistance bands can help individuals gradually build the necessary strength to perform unassisted pull-ups.