Brazilian Jiu-Jitsu has roots in traditional Judo fundamentals and has since been adapted into its own sport. Codified in Brazil under the Gracie family, BJJ teaches how to control or disable another person through takedowns, pins, joint locks, and chokes. Proper technique involves an understanding of leverage and basic principles of biomechanics and physics, and a skilled practitioner can effectively neutralize a much larger and/or stronger opponent.
Students should wear rashguards or other sleeved shirt, and board shorts (no pockets!) or spats. Fingernails and toenails need to be trimmed and good hygiene must be observed.