One of the reasons for its safety is that the Activity doesn’t center on strikes, punches, and strong blows but rather on staying minimal and with the ability to power your opponent right into a position that offers you dominance. The third variant may be the Japanese/Ne Waza (grappling) system https://bizorganic.com/exploring-the-world-of-jiu-jitsu-in-jacksonville-and-surrounding-areas/