A gymnast performs her floor exercises.
floor exercise definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Gym. an event in which a gymnast performs, without apparatus, a routine involving a series of tumbling movements, acrobatic leaps, and balletic displays
floor exercise definition by American Heritage Dictionary
An event in competitive gymnastics that consists of various tumbling maneuvers performed on a mat.