(n.) One who teaches or practices gymnastic exercises; the manager of a gymnasium; an athlete.

aerialist bareback rider circus artist clown contortionist equestrian director equilibrist flier funambulist gymnast high wire artist high-wire artist juggler lion tamer palaestrian pancratiast ringmaster ropewalker slack-rope artist snake charmer sword swallower tightrope walker trapeze artist tumbler weightlifter