Simmudo[1] is a martial art created by Grandmaster Song Pan-Gong of Siheung, Gyeonggi Province, of South Korea.
Officially founded in 1999, Simmudo, pronounced shim mu doh, literally means "the way of the martial heart".
[3] The self-defense (hosinsul) techniques of Simmudo are similar to Hapkido in that they use a wide variety of wrist and arm locks, come-alongs, and tripping and throwing maneuvers designed to bind the opponent and force them off balance, often into a throw.
Also similar to Hapkido, the techniques most often keep the thrower in a ready position to quickly engage additional attackers.
This includes punching and kicking common to Taekwondo, as well as trapping and blocking strikes to disable and protect.