A pull-up bar is a simple piece of exercise equipment designed for strength training. It is typically a horizontal bar that can be mounted on a wall, doorframe, or free-standing structure. Users grip the bar with their hands and pull their body upward, primarily working the muscles in the arms, shoulders, and back. Pull-up bars come in various styles, including doorway pull-up bars that fit over a doorframe and free-standing pull-up stations that offer additional workout options. They are popular among fitness enthusiasts for building upper body strength and improving overall fitness.