The United States Tumbling & Trampoline Association (U.S.T.A.) offers competitions in tumbling, trampoline and double-mini trampoline. It was founded in 1971 by Larry Griswold and George Nissen. 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 since 1997.