Because pull-ups are far-fixed training movements, pull-ups are referred to as pull-ups for short, which refers to hanging exercises that rely on their own strength to overcome their own weight and do work upwards. It mainly tests the development level of upper limb muscle strength, as well as arm strength and waist and abdomen strength. In the process of completing a complete pull-up, many back skeletal muscles and upper limb skeletal muscles need to participate in the work, which is a multi-joint compound action exercise.