Overhook shoulder lock defence

Overhook shoulder lock defence is the descriptive name for defending the Mir lock — the shoulder submission that folds a bent arm across the attacker’s chest from an overhook and turns it up and away.

Etymology. Naming the overhook names the thing being defended, which the technique’s eponymous name does not. It also names the stage that matters: the overhook is where the submission is won and lost, so a defender who knows only one word about it should know that one.

Mechanics. The defence inverts the corpus’s standard arm-defence instruction, and that inversion is the whole point. Keeping the elbow bent and tucked denies the armbar, the straight armlock and the baratoplata; the Mir lock attacks a bent arm at roughly a right angle, so folding the elbow supplies the shape the lock requires. What denies it is the arm battle above the elbow — take the underhook, or keep the arm low and in front where it cannot be reached over. Once the overhook lands, the escape is to straighten hard along the arm’s own line while a gap remains between your upper arm and their chest; once the clasp closes that gap, the only answer left is to rotate the whole torso in the direction the lock is turning, which removes the differential the shoulder is being loaded through.

Cross-reference. The bicep slicer is the other submission the trained arm-defence reflex feeds. Full escape coverage on Mir Lock Escape.