Kneebar
Kneebar — hyperextends the knee by trapping the foot and driving the hip into the back of the knee. Legal in ADCC and EBI.
Adapted from InGrappling, Kneebar. System Games did not invent this curriculum.
The kneebar attacks the knee in hyperextension. The attacker traps the opponent’s leg under their armpit, grips the foot, and drives their hip into the back of the opponent’s knee — forcing the joint past its structural range in the same direction as a straight armbar, but applied to the knee.
Unlike heel hooks, the kneebar does not load the knee through rotation. It loads the posterior structures — the posterior cruciate ligament and the joint capsule — through straight hyperextension. This gives the kneebar a different injury profile: the progression from discomfort to structural damage is marginally slower than a heel hook, but the damage when it occurs is serious. The kneebar is not a gentle submission.
Position access determines kneebar availability. Outside ashi garami, the truck, and certain passing scrambles all create kneebar opportunities. Cross ashi also allows it as a secondary option. The kneebar is not a substitute for heel hooks — it is a distinct tool with different entry requirements and different mechanical logic.
Elevated RiskKneebar is an elevated risk technique. The kneebar hyperextends the knee joint against the posterior structures. The PCL and posterior joint capsule are under load throughout the submission. Tapping late — or defending by straightening the leg against resistance — accelerates the damage. Serious injury can occur faster than most practitioners expect.
If you are new to this technique: read this section before anything else. Understanding the danger is part of understanding the technique.
The person applying the technique is responsible for releasing immediately.
Communicate before drilling. Know your partner's experience level with this position.
Do not train this technique while fatigued or in live rolling without established mat culture.