Glossary /// Alias
Ashi ankle compression escape
Also known as Tren Lock Escape — the canonical term used on this site.
Training background: Descriptive term for the same defence, named for where the attack is entered from
Descriptive — ankle compressed from ashi garami
Ashi ankle compression escape is the descriptive name for Pato lock defence, naming the entanglement it comes from and the joint it actually attacks.
Etymology. Naming the ankle explicitly is the point of this label. The Pato sits among knee-attacking leg locks and is routinely mistaken for one, so the descriptive form corrects the most common misreading of the position.
Mechanics. The finish is extension and compression driven by the attacker’s torso through a fixed arm wrap, not torsion. The heel must sit in the elbow crook for the drive to reach the ankle rather than the calf, which makes denying the wrap its depth the middle-stage answer.
Cross-reference. “Front tren lock defence” names the shared target. Full escape coverage on Tren Lock Escape.