Alias · Escapes & Defence
Leg straightener escape
Also known as Kneebar Escape — the canonical term used on this site.
Descriptive — escape from the leg-straightener (kneebar)
Leg straightener escape is the descriptive name for the kneebar escape — flagging the leg-extension mechanic that defines the parent submission, in which the attacker forces the opponent’s leg into full extension to load the knee joint.
Etymology. “Leg straightener” is one of the descriptive English names for the kneebar — emphasising the straightening motion that loads the joint past its safe range. The label appears in coaching vocabulary that prefers descriptive English to the BJJ-standard “kneebar.”
Mechanics. The escape priority is preventing the leg from being fully extended into the loading position — the knee’s structural margin under hyperextension is narrow, so the early-phase escape (before the leg straightens) is the high-percentage defence.
Cross-reference. “Kneebar escape” is the standard name. Full mechanical coverage on Kneebar Escape.