Ankle Lock

The straight ankle lock (also called ashi-garami or footlock) is a submission that hyperextends the ankle joint by wrapping the forearm around the Achilles tendon area and arching the hips forward while controlling the opponent's leg. It is the most basic and widely permitted leg lock in BJJ competition, often serving as a competitor's first introduction to lower-body submissions.

The ankle lock's legality varies significantly by organization, age, and belt level. In IBJJF, the straight ankle lock is legal for adults from white belt and above in both gi and no-gi. For juveniles (16-17), it is also legal. However, for younger competitors (kids and pre-teens), ankle locks are illegal in IBJJF. NAGA allows ankle locks for beginner adults and up. AGF permits them for teen and adult divisions. Grappling Industries allows them across most adult divisions. This variation makes it critical for competitors and coaches to check the specific ruleset before competing.

Because the ankle lock is a straight hyperextension (like an armbar for the foot), it provides a clear pain signal before injury — the competitor feels increasing pressure and has time to tap. This makes it safer than rotational locks like heel hooks or toe holds. For youth competitors approaching the age where ankle locks become legal, coaches should ensure they understand both the offensive application and the proper defensive responses to avoid injury in their first competitions where the technique is permitted.