Watch this video and more on Insight TV
Dave Leduc is the undefeated world champion in Lethwei, the most brutal sport in the world. It is fought without gloves, with elbows, headbutts and take downs.
Australian Michael No, who lives and works in Japan, trains at a 900 year old Yabusame school and performs traditional horseback archery during a shinto ritual.
Tharoth Sam, 26, is the first female fighter in Cambodian Bokator. She is also an MMA fighter and became a movie star starring in the big screen blockbuster, Jailbreak.
George Birkadze from Tblisi, Georgia, practices and teaches Mixed Martial Arts but is also a world famous ballet dancer, instructor and choreographer in based in Boston, U.S.A.