Brazilian, or “sport” Jiu-Jitsu can be described as both a martial art and combat sport that focuses on grappling and especially ground fighting. Both Judo and BJJ share the basic principle that by using leverage and proper technique a smaller, weaker person can successfully defend against a larger, more powerful assailant—in particular by applying joint-locks and chokeholds to defeat the aggressor. BJJ also includes many self-defense applications.  Jeff Nielsen, the only Brazilian Jiu Jitsu blackbelt in Fairbanks and IBJJF certified, is the head instructor.