Mixed martial arts (MMA) is a regulated hand to hand combat sport played between two athletes trained in the various forms of martial arts. Formally known as "hybrid martial arts", MMA is a blending of several unarmed fighting techniques such as grappling, kicking, and striking, borrowed from Muay Thai, Karate, Jiu-Jitsu, Judo, Kung Fu, boxing, wrestling, stick fighting, kickboxing, Sambo, Vale Tudo, and others.