A Body Triangle also known as a Figure-four body lock, is a technique in grappling that is employed from the back, back mount, or less frequently from the closed guard, whose purpose is to securely lock the practitioner’s opponent in position.^[1] This technique is very similar to one of the four forbidden techniques in Judo, the Do-Jime or Trunk hold. The main characteristic of the Body Triangle that distinguishes it from hooks is the commitment to the position, i.e. once executed the position is difficult to escape; however, it also severely limits the offensive options of the practitioner employing it.

The most predominant submission attack associated with the body triangle is the rear naked choke. The resultant limited ability of the opponent to gain breath during the body lock compounds the effectiveness of the chokehold significantly, making this the ideal attack. Other attacks include variations on the neck crank, wrist locks and shoulder locks, but have a considerably lower percentage of success. The Body Triangle itself will sometimes cause an opponent to submit, however this tends to be less frequent due to the relatively high level of conditioning most practitioners of grappling arts possess.

In order to escape or reverse the body triangle the first priority is to unlock the figure-four; this can be quite difficult depending on the skill of the practitioner performing the technique, and consequently often leaves a practitioner vulnerable to attack, either by striking or submission. Striking options are also severely limited when a practitioner is subject to a body-lock, the most common being a rear elbow strike to the head of the opponent.

How to escape the body triangle. This video demonstrates how to get out of the body triangle when your opponent has your back either in BJJ or MMA.