The United States Tumbling & Trampoline Association (U.S.T.A.) offers competitions in tumbling

Tumbling (gymnastics)

In gymnastics, tumbling, also known as power tumbling is an acrobatic sporting discipline which combines some of the skills of artistic gymnastics on the floor with those of trampolining. It is practised on a 25 metre long spring track...

, trampoline

Trampoline

A trampoline is a device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs. People bounce on trampolines for recreational and competitive purposes....

 and double-mini trampoline. It was founded in 1971 by Larry Griswold

Larry Griswold

Laurens V. Griswold , known as "The Diving Fool", was an American gymnast & entertainer who was involved in the early development of the trampoline....

 and George Nissen

George Nissen

George P. Nissen was an American gymnast and inventor who developed the modern trampoline and made trampolining a worldwide sport.-Background:...

. Starting with 200 members and one division, the U.S.T.A. now has 6000 members, nine divisions for tumbling, and six divisions for the double-mini and the trampoline. The U.S.T.A. offers scholarships to athletes, and has been an allied member of the Amateur Athletic Union

Amateur Athletic Union

The Amateur Athletic Union is one of the largest non-profit volunteer sports organizations in the United States. A multi-sport organization, the AAU is dedicated exclusively to the promotion and development of amateur sports and physical fitness programs.-History:The AAU was founded in 1888 to...

since 1997.