Episode 5 | Kneebar Leg Lock Drill #1
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Kneebar Lock·King Kneebar
Bendy Casimir, Taylor "Ninja" McCorriston, and Daniel Almodovar go over different attacks from the kneebar. Link to Rob…
Kneebar Lock
Familyニーバー(Nībā)
TransliterationTranslation: kneebar lock
Overview
The kneebar is a joint lock that hyperextends the knee by isolating the opponent's leg and using the hips as a fulcrum against the knee joint, similar to how an armbar uses the hips against the elbow. [1],[2] The attacker controls the opponent's lower leg (typically hugging it to the chest) and bridges or hip-extends to straighten the knee beyond its anatomical range, stressing the ACL, PCL, and posterior knee capsule. Kneebars are entered from leg entanglements (ashi garami positions), from top positions when passing, and as transitions from other leg attacks. [3] In IBJJF competition, kneebars are restricted to brown and black belt in no-gi; in ADCC and MMA, they are unrestricted.
History & Origin
Kneebars have been a standard technique in sambo competition since the sport's early development, reflecting sambo's comprehensive approach to leg attacks. [1],[2] In Brazilian Jiu-Jitsu, kneebars were historically under-studied compared to upper body submissions, but the leg lock revolution of the 2010s brought them into mainstream competition. [3] Dean Lister, a pioneer of leg lock offense in submission grappling, was known for his kneebar attacks at ADCC and was instrumental in demonstrating their viability at the highest levels of competition.
Effectiveness
The kneebar hyperextends the knee joint by applying pressure against the natural bend, similar to an armbar for the leg. [1]
Lineage
Kneebars appear in judo (as ashi-garami variations), sambo, and catch wrestling, and were adopted into BJJ. [1]
Competition Record
Kneebars are legal at brown/black belt in IBJJF, and fully legal in ADCC and MMA. They are a common finish at advanced no-gi events. [1]
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Biomechanical Mechanism
Primary Action — Hyperextension of the elbow joint — the hips drive upward against the posterior humerus while controlling the wrist
Joints Involved — Elbow (extension beyond normal ROM), wrist (stabilized), shoulder (isolated and controlled)
Force Vector — Posterior-to-anterior force on the upper arm with fixed distal anchor at the wrist creates a lever arm across the elbow
Leverage Principle — Hips act as the fulcrum — the longer the lever (full arm extension), the less force needed to hyperextend
Position & Entry
From guard — Control the wrist and posture, pivot hips perpendicular, throw leg over the head and extend hips to hyperextend the elbow
From mount — Isolate the arm, transition to S-mount or perpendicular, swing leg over and finish
From side control — Step over the head, isolate the near arm, fall back into the armbar position
Videos
1 video
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Ratings
Risk of injury to the person this technique is applied to
8
Very High8/10
Kneebars hyperextend the knee joint; risk of ACL and PCL damage
Skill level needed to execute this technique reliably
Advanced
Whether this technique is allowed under major competition rule sets
Illegal
— kansetsu-waza
IJF Sport and Organisation Rules 2025, Article 27PDFRestricted
— IBJJF — Brown and black belt only
IBJJF Rules Book v6.0, June 2024PDFLegal
— ADCC — Legal — all submissions legal in ADCC
ADCC Rules Update, April 2025PDF— Unified MMA — Legal submission technique
Unified Rules of MMA, August 2025PDF— FIAS Sport Sambo — Legal
FIAS International Sambo Competition RulesPDF— FIAS Combat Sambo — Legal
FIAS Combat Sambo RulesPDFTraining Notes
✓The kneebar (hiza-juji-gatame) hyperextends the knee joint — it is the leg equivalent of the armbar, using the hips as a fulcrum against the front of the knee (Danaher, Leg Lock Anthology, 2019)
✓The mechanic: the attacker traps the opponent's leg between their thighs with the knee against the hips, controls the ankle, and extends — hyperextending the knee backward
✓Kneebars are legal in IBJJF from brown belt, in ADCC at all levels, and in MMA — they are considered intermediate-risk leg submissions
✓Entry positions for kneebars: from guard passing, from leg entanglements, from mount transitions, and from back control when the opponent exposes a leg
✓The kneebar shares the same finishing mechanics as the armbar: squeeze the knees together, control the ankle (foot), and lift the hips for the extension
✓The knee joint is a hinge: it only bends in one direction, making the kneebar a straightforward mechanical lock when properly applied
✓Kneebar defence mirrors armbar defence: bend the knee (like bending the arm in armbar defence) and work to free the hip from between the attacker's thighs
Common Mistakes
!Not controlling the opponent's hip — if the hip is free, the opponent can rotate and extract the leg; your legs must pinch their thigh tightly
!Placing the knee against the wrong part of your body — the knee must sit directly against your hip line for the fulcrum to work
!Not controlling the foot/ankle — both hands must secure the foot to prevent the opponent from bending the knee
!Squeezing only with the arms — like the armbar, the kneebar finishes with hip elevation, not arm pulling
!Crossing the legs in the wrong position — your legs must be positioned to prevent the opponent from spinning out
!Attempting kneebars without leg entanglement knowledge — kneebars require proper leg position to prevent counter-attacks
!Not drilling kneebar defence — because kneebars are powerful submissions, everyone must know how to defend them
Related Techniques
Counter Techniques
Setup Chain
1Control the Arm — isolate and grip the target arm
2Position the Hips — align hips perpendicular to the arm for maximum leverage
3Pinch Knees — squeeze knees together to prevent arm extraction
4Extend for the Finish — bridge hips up while pulling the wrist down to hyperextend the elbow
Sources & References
Primary Source
Shooto Official Rules — Leg Lock Classification
1BookShooto Official Rules — Leg Lock Classification
Japanese terminology sourced from Shooto Official Rules — Leg Lock Classification
2CompetitionShooto Official Rules
Japanese MMA pioneer organization — technique classification
3OtherJapanese Combat Sports Katakana Convention
Standard katakana transliteration of Western martial arts terminology (外来語) — used in Japanese MMA, boxing, and BJJ communities
4CitationShooto Official Rules — Leg Lock Classification
Japanese terminology sourced from Shooto Official Rules — Leg Lock Classification
Community
Athletics
Requires
hip flexibility, hip bridge power, leg clamping strength
Favours
long legs for controlling the opponent's torso
Key muscles
hip extensors (glutes), adductors, quadriceps, hamstrings
Sub-techniques
Notes
The kneebar hyperextends the knee joint and is mechanically similar to the armbar but applied to the leg. Legal in IBJJF from brown belt (gi) and purple belt (no-gi). (IBJJF Rules v6.0)
Frequently Asked Questions
How do I keep my opponent's leg bent during a kneebar setup?
Bend your body back and keep the knee pinched to prevent the leg from straightening out. King Kneebar emphasizes that you want to maintain this bent position throughout the setup phase.
What's the correct way to finish a kneebar without rotating dangerously?
Bring your back toward your opponent's back and scoot your butt closer to theirs rather than rotating. King Kneebar stresses being careful with this movement during drilling to avoid injury.
How do I prevent my opponent from escaping when I transition to a heel hook?
Keep constant pressure toward your opponent's head with your leg to stop them from kicking their foot through. If you lose this pressure, they can kick free and the lock fails.
Where should I grip when locking the foot for the finish?
Lock nice and low on your opponent's toes rather than grabbing high up. When you finish, bring their big toe toward their butt while maintaining control.
How does the Kneebar Lock work?
The kneebar is a joint lock that hyperextends the knee by isolating the opponent's leg and using the hips as a fulcrum against the knee joint, similar to how an armbar uses the hips against the elbow. The attacker controls the opponent's lower leg (typically hugging it to the chest) and bridges or hip-extends to straighten the knee beyond its anatomical range, stressing the ACL, PCL, and posterior knee capsule.
Where does the Kneebar Lock come from?
Kneebars have been a standard technique in sambo competition since the sport's early development, reflecting sambo's comprehensive approach to leg attacks. In Brazilian Jiu-Jitsu, kneebars were historically under-studied compared to upper body submissions, but the leg lock revolution of the 2010s brought them into mainstream competition.
Is the Kneebar Lock legal in competition?
IBJJF: restricted — Brown and black belt only; IJF: banned — Only elbow joint locks (kansetsu-waza) permitted in judo — all other joint lo…; ADCC: legal — Legal — all submissions legal in ADCC; Unified MMA: legal — Legal submission technique; FIAS Sport Sambo: legal — Legal; FIAS Combat Sambo: legal — Legal
How dangerous is the Kneebar Lock?
Danger rating 8/10. Kneebars hyperextend the knee joint; risk of ACL and PCL damage
How do I set up the Kneebar Lock?
The standard setup chain: Control the Arm → Position the Hips → Pinch Knees → Extend for the Finish.
How do I defend against the Kneebar Lock?
Standard counters include: Clasp Hands — grip own wrist to prevent arm extension / Stack — drive forward to compress the attacker and relieve elbow pressure / Hitchhiker Escape — rotate the thumb toward the mat and roll to extract the arm.
What are the variants of the Kneebar Lock?
Common variants: Standard armbar (hips drive upward against the extended arm with legs clam…); Belly-down armbar (rolling to face the mat to prevent the opponent from stac…); S-mount armbar (transitioned from S-mount position for tighter control be…); Spinning armbar (rapid pivot from guard or side to catch the arm during tr…).
How effective is the Kneebar Lock in competition?
Kneebars are legal at brown/black belt in IBJJF, and fully legal in ADCC and MMA. They are a common finish at advanced no-gi events.
What are common mistakes when doing the Kneebar Lock?
Top errors to watch for: Not controlling the opponent's hip — if the hip is free, the opponent can rotate and extract the leg; your legs must … / Placing the knee against the wrong part of your body — the knee must sit directly against your hip line for the fulcr… / Not controlling the foot/ankle — both hands must secure the foot to prevent the opponent from bending the knee / Squeezing only with the arms — like the armbar, the kneebar finishes with hip elevation, not arm pulling.
What are other names for the Kneebar Lock?
The Kneebar Lock is also known as Nībā, Kneebar, Hiza-juji-gatame, Knee Lock.