Gymnastics is a sport that includes exercises requiring balance, strength, flexibility, agility, coordination and endurance. The movements involved in gymnastics contribute to the development of the arms, legs, shoulders, back, chest and abdominal muscle groups. Alertness, precision, daring, self-confidence and self-discipline are mental traits that can also be developed through gymnastics. Artistic Gymnastics is usually divided into Men's and Women's Gymnastics. Men compete on six events: Floor Exercise, Pommel Horse, Still Rings, Vault, Parallel Bars, and Horizontal Bar, while women compete on four: Vault, Uneven Bars, Balance Beam, and Floor Exercise.