The primary benefits of the chin-up are increasing strength and definition of the upper arms, specifically the biceps, the posterior deltoids of the shoulders and the teres major and latissimus dorsi muscles of the back.Chin Up is an exercise in which one hangs by the hands from a support (such as a horizontal bar) and pulls oneself up until the chin is level with the support. Such an exercise done with the palms facing inward (a pull up is done with the palms facing outward). Most upper body exercises will help with chin-ups.
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