A tumble turn, or flip turn is a technique of turns in swimming, used to reverse the direction in which the person is swimming. It is done when the swimmer reaches the end of the swimming pool but still has one or more lengths to swim.
The technique's development is credited, by the International Swimming Hall of Fame, to legendary University of Texas swim coach Tex Robertson while he was training Adolph Kiefer for the 1936 Olympics. 
Flip turns are only permitted during front crawl and backstroke races. In butterfly and breaststroke races, regulations require swimmers to touch the end of the pool with both hands simultaneously before turning back for another length. This style of turning is called an Open Turn.
- "Former Men's Swimming and Diving coach "Tex" Robertson passes away at 98". Texassports.com. 2007-08-27. Retrieved 2007-09-17.[dead link]
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- Leisure Press, Swimming into the 21st Century - Colwin C. Mayfield, Swim Even Faster, Maglischo E W, (Edit.1993).
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- Wolfe Medical Publications, Athletic Ability and the Anatomy of Motion, Wirhed R, (1984).
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