SOFIA, Bulgaria, Nov. 15, 2013 – Brandon Krzynefski of Centreville, Va./Capital Gymnastics National Center, won the 15-16 boys tumbling gold medal as the U.S. medal count at the 2013 World Trampoline and Tumbling Age Group Competition in Sofia, Bulgaria, increased to six. Jerrett Jensen of Gilbert, Ariz./Aspire Kids Sports Center, won the silver medal in the 17-18 boys double mini-trampoline final, while Alyssa Oh of Rocklin, Calif./Technique Gymnastics, and Olivia Simpson of Lubbock, Texas/Ready Set Go- Air Extreme, earned the silver for 11-12 girls synchronized trampoline.

Krzynefski posted a 33.900 in the final to take the top spot in the boys 15-16 tumbling competition ahead of Russia’s Stanislav Gostev, 33.200, and Canada’s Kyle Carragher, 33.100.

Portugal’s Diogo Costa edged Jensen out for the gold, 70.800 to 70.600, in the 17-18 boys double mini-trampoline final. Canada’s Douglas Armstrong, 70.200, finished with the bronze medal.

In the last final of the day, Oh and Simpson scored a 41.100 to finish second to Great Britain’s Madeleine Songhurts and Lucy Horan, 42.900, in the girls 11-12 synchronized trampoline competition. Australia’s Imogen Florian and Jessica Pickerng, 40.800, finished third.

Fans can watch the competition live for free via Additional information is available on the International Gymnastics Federation’s microsite,

Trampoline events involve athletes using trampolines that can propel them up to 30 feet in the air, during which they can perform double and triple twisting somersaults. Tumbling utilizes elevated rod-floor runways that enable athletes to jump at heights more than 10 feet and execute a variety of acrobatic maneuvers. For the double-mini competition, the athlete makes a short run, leaps onto a small two-level trampoline, performs an aerial maneuver and dismounts onto a landing mat. Trampoline was added to the Olympic Games in 2000, and at the 2012 Olympic Games in London, the USA had its first athlete in history advance to the finals.