Brazilian jiu-jitsu involves grappling.
Brazilian Jiu-Jitsu ( [ dʒuːˈdʒɪtsuː ] [ ˈʒiw ˈʒitsu ] , [ ˈʒu ˈʒitsu ] , [ dʒiˈu dʒiˈtsu ] ) ( BJJ ; jiu-jitsu brasileiro ) is a martial art , combat sport system that focuses on grappling and especially ground fighting . BJJ training can be used for sport grappling tournaments and in self-defense situations .