Striking, grappling, traditional katas, and full-contact pressure tests all crammed into 24 grueling hours. Welcome to I Sparred Every Martial Art In One Day. In this ultimate martial arts gauntlet, Jesse Enkamp (The Karate Nerd) and Sensei Seth step onto the mats to test their skills against dedicated practitioners from every major combat discipline—from boxing and Muay Thai to Brazilian Jiu-Jitsu, Judo, Taekwondo, and Wing Chun.