The uneven parallel bars are an apparatus used in women's artistic gymnastics, consisting of two bars set at different heights. Some synonyms for the uneven parallel bars include asymmetric bars, uneven bars, and simply bars. Another term used for this equipment is the uneven horizontal bars. The asymmetric bars are popularly known as an event in gymnastics, where the gymnasts perform a routine that includes various skills and combinations on the apparatus. These bars demand the gymnasts to make use of their upper body strength, flexibility, and coordination to perform a range of complex skills.