Cage-fighting Kids: Children As Young As Four Train In MMA\rbrSubscribe: \rbr\rbrSporty sisters Maria and Valery Bystritskii may look innocent - but theyre ually boy-beating cage fighters. The pair, aged just 11 and 10, enjoy gymnastics, painting and skiing like normal kids, but can also punch, grapple and submit opponents using slick mixed-martial arts manoeuvres. Both are students at Bunnys Gym in Winchester, Tennessee, where children as young as four are taught mixed martial arts or MMA, the sport popularised by the Ultimate Fighting Championship.\rbr\rbrVideographer Director: Mike Saliba\rbrProducer: John Balson, Nick Johnson\rbrEditor: Sonia Estal\rbr\rbrFor more Shorts visit \rbr\rbrSUBSCRIBE to the Barcroft network:\rbr\rbrBarcroft TV: \rbrBarcroft Cars: \rbrBear Grylls Adventure: \rbr\rbrFor more of the amazing side of life:\rbr\rbrFor the full story, visit BARCROFT.