The sport involving balance beams, uneven bars, and cartwheels is gymnastics. To be good at gymnastics, you have to be strong, limber, and able to do handstands.
In ancient Greece, young men originally learned gymnastics as a way of training for war. Today's elite gymnasts work just as hard to perfect routines for competition. Women and girls compete in four gymnastics events: uneven bars, vault, floor excercise, and balance beam. Men's gymnastics includes four events: floor exercise, vault, pommel horse rings, high bar, and parallel bars. The word gymnastics shares a root with gymnasium: the Greek word gymnazein, "to exercise or train."