Sentinel Martial Arts (SMA) delivers technique-first martial arts training for kids and adults in Atherton, on the Atherton Tablelands. Choose Brazilian Jiu-Jitsu (BJJ), Muay Thai, Kali and Mixed Arts, or train in the Foundations program for ages 7 to 13 combining Brazilian Jiu-Jitsu, body-weight exercise and Thai Boxing concepts. Kids BJJ focuses on confidence, discipline and self-defence while building fitness and resilience.