Gymnastics uses asymmetric bars, rings and a pommel horse. It is a men's and women's sport that requires balance, strength, flexibility, agility, endurance and control. The movements involved in gymnastics contribute to the development of the arms, legs, shoulders, chest and abdominal muscle groups. It typically involves the women's events of vault, uneven bars, balance beam and floor exercise. Men's events are floor exercise, pommel horse, still rings, vault, parallel bars and horizontal bar.