Knee on Belly to Arm Triangle!
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Arm Triangle Choke — From Knee on Belly·TeachMeGrappling Coach Brian
This video I teach some details on mounting from knee on belly and going for the arm triangle. Check out the details an…
Arm Triangle Choke — From Knee on Belly
Variety肩固め（膝乗せから(Kata Gatame — From Knee on Belly)
TraditionalTranslation: Shoulder Hold / Arm-and-Head Lock — From Knee on Belly
Overview
An arm triangle choke variation applied from the knee-on-belly position. The attacker drives the knee across the opponent’s torso to control posture, while isolating one arm against the opponent’s head. The top shoulder and chest compress the opponent’s trapped arm into the neck, while body weight and hip angle drive the choke. This setup combines positional dominance with immediate submission pressure.
History & Origin
An adaptation of the traditional kata gatame, integrated into modern BJJ and Judo as a submission threat from the mobile knee-on-belly control position.
Effectiveness
Lineage
The arm triangle transition from knee-on-belly was developed in BJJ as an attacking option from a dominant control position. [1]
Competition Record
Knee-on-belly to arm triangle is a common competition sequence at brown and black belt IBJJF events. [1]
Images
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Biomechanical Mechanism
Action — Lateral compression of the neck with opponent’s own arm and attacker’s shoulder pressure
Joints Affected — Neck (carotid arteries), shoulder
Torque Direction — Side pressure from shoulder and chest, reinforced by knee-on-belly base
Position & Entry
From side control, step knee across opponent’s torso into knee-on-belly, use cross-face or underhook to trap opponent’s arm against the head, then drive shoulder pressure while angling body to lock the choke.
Variants
Arm isolation triangle from knee on belly
High knee-on-belly triangle
Knee-on-belly to triangle setup
Reverse triangle from knee on belly
Standard triangle from knee on belly
Videos
Which Knee on Belly Choke is Right For You?
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Arm Triangle Choke — From Knee on Belly·ROYDEAN
Jiu Jitsu Instructionals: https://roydeanacademy.com One Channel. Every Instructional: https://roydean.vhx.tv/browse S…
Head and Arm Triangle Chokes | The Jiu Jitsu Class | Grappling
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Arm Triangle Choke — From Knee on Belly·ROYDEAN
Jiu Jitsu Instructionals: https://roydeanacademy.com One Channel. Every Instructional: https://roydean.vhx.tv/browse S…
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3 videosWhat Instructors Say
The arm triangle choke from knee on belly is executed by first establishing deep collar control and allowing or encouraging the opponent to turn into the attacker's body—a defensive response that paradoxically facilitates the technique. ROYDEAN emphasizes opening the collar deeply and creating a "ridge" with the fabric before circling the forearm around the opponent's head to form a wall with the top hand, while the bottom wrist rises into the neck. TeachMeGrappling Coach Brian stresses maintaining balance on the knee on belly position and methodically walking the opponent's arm across the body, keeping the right elbow out to prevent the opponent from clamping down and executing a bridge. Both instructors agree on the importance of controlling the opponent's head position—ROYDEAN mentions leaning into the neck to allow slight elevation, while Brian specifies keeping the head elevated to prevent the opponent from generating power. The choke is finished by pinching the elbow with the arms locked in either a gable grip (palm over palm) or by raising the bottom wrist up and into the neck. ROYDEAN introduces a "terminator" variation where the cuff is grabbed to turn the opponent and the tricep is controlled with body weight before rolling the hand up. Both instructors note that proper arm positioning—particularly preventing the bottom elbow from closing in—is critical to maintaining the lock. Brian emphasizes patient, methodical adjustment rather than rushing, and recommends having the opponent actively resist throughout the setup to practice realistic application.
Synthesized from 3 instructors
- ROYDEAN — Which Knee on Belly Choke is Right For You?: Detailed the standard arm triangle setup from knee on belly with deep collar control, the ridge grab, and forearm circling mechanics. Introduced the terminator choke variation using the cuff grip and tricep control. Provided multiple finishing hand positions and discussed weight distribution techniques to increase choke efficiency.
- TeachMeGrappling Coach Brian — Knee on Belly to Arm Triangle!: Emphasized balance and positional stability on knee on belly, detailed methodical arm movement across the opponent's body, and stressed the importance of head control and elevation during the setup. Provided specific warnings about keeping the right elbow out and discussed defensive variations including leg capture counters and choke adjustments when resistance occurs.
- ROYDEAN — Head and Arm Triangle Chokes | The Jiu Jitsu Class | Grappling: Provided foundational context for the arm triangle family of techniques, including head positioning (low near hip line sweeping up) and multiple finishing grips. Discussed the relationship between the standard arm triangle and the Darce choke variation, reinforcing core mechanical principles applicable to the knee on belly version.
Learn This Technique
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Ratings
Risk of injury to the person this technique is applied to
9
Extreme9/10
Strong positional pressure and direct vascular choke; unconsciousness occurs quickly if not released.
Skill level needed to execute this technique reliably
Advanced
Whether this technique is allowed under major competition rule sets
Illegal
FIAS Sport Sambo— no chokes in sport sambo, FIAS Rules 2024
Legal
IBJJFIJFUnified MMAADCC
Training Notes
✓Keep a stable base to avoid sweeps; use knee pressure to pin hips; angle chest and shoulder into choke rather than relying only on arm squeeze.
Common Mistakes
!Not trapping the arm tightly
!Overcommitting weight forward (risking sweep)
!Poor angle, resulting in crank instead of choke.
Related Techniques
Counter Techniques
Tuck Chin — protect the neck by lowering the chin to prevent the choke from sinkingTwo-on-One Grip Fight — use both hands to strip the choking grip before it locksTurn Into — rotate toward the choking arm to relieve carotid pressurePosture Up — straighten the spine and create distance to break the choking angle
Setup Chain
1Achieve Controlling Position — secure the position from which the choke is applied
2Isolate the Neck — clear defending hands and establish access to the throat
3Set the Grip — lock the choking configuration (arm, lapel, or leg placement)
4Apply Pressure — squeeze to compress the carotid arteries for the finish
Sources & References
Primary Source
Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
1BookKodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Japanese terminology sourced from Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Official Kodokan ground technique classification system
3OtherJapanese Martial Arts Standard Terminology (武道用語)
Established Japanese martial arts naming convention — native Japanese term (和語/漢語)
4CitationKodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Japanese terminology sourced from Kodokan Judo — Official Katame-waza Classification (肩固め Kata-gatame)
Community
Athletics
Requires
hip flexibility, long legs relative to torso
Favours
longer limbs for easier figure-four lock around head and arm
Key muscles
hip adductors, hamstrings, quadriceps
Notes
Serves as a transitional attack that threatens immediate submission or forces defensive openings for mount or back takes.
Frequently Asked Questions
How do I set up the arm triangle choke from knee on belly?
From knee on belly, grab the collar to create a ridge, circle your elbow around the opponent's head starting from the middle, then drop down so your top arm becomes a wall and your bottom wrist comes up into the neck. If they push your knee off and turn into you, that's actually what you want—it helps you finish the choke.
What should I do if I can't get my pinky into the crook of my elbow?
For larger opponents or if you're having trouble, modify the grip by placing your hand flat on your forearm instead of using the pinky-in-crook grip, then roll it up the same way as you compress. This adjustment works just as well if you can't get the full grip.
Why shouldn't I clamp my elbow in during the setup?
TeachMeGrappling Coach Brian explains that closing your elbow is very bad because once your opponent clamps that arm and executes a bridge, you'll become off-balance enough to lose the position.
Should I try to finish the arm triangle from knee on belly, or move first?
You should always knock your opponent onto their side before finishing—never try to finish from the knee on belly position itself. Once they're on their side, you can secure the choke more effectively.
How does the Arm Triangle Choke — From Knee on Belly work?
An arm triangle choke variation applied from the knee-on-belly position. The attacker drives the knee across the opponent’s torso to control posture, while isolating one arm against the opponent’s head.
Where does the Arm Triangle Choke — From Knee on Belly come from?
An adaptation of the traditional kata gatame, integrated into modern BJJ and Judo as a submission threat from the mobile knee-on-belly control position.
How dangerous is the Arm Triangle Choke — From Knee on Belly?
Danger: 9/10 | Strong positional pressure and direct vascular choke; unconsciousness occurs quickly if not released.
How do I set up the Arm Triangle Choke — From Knee on Belly?
The standard setup chain: Achieve Controlling Position → Isolate the Neck → Set the Grip → Apply Pressure.
How do I defend against the Arm Triangle Choke — From Knee on Belly?
Standard counters include: Tuck Chin — protect the neck by lowering the chin to prevent the choke from sinking / Two-on-One Grip Fight — use both hands to strip the choking grip before it locks / Turn Into — rotate toward the choking arm to relieve carotid pressure / Posture Up — straighten the spine and create distance to break the choking angle.
What are the variants of the Arm Triangle Choke — From Knee on Belly?
Common variants: Arm isolation triangle from knee on belly; High knee-on-belly triangle; Knee-on-belly to triangle setup; Reverse triangle from knee on belly; Standard triangle from knee on belly.
How effective is the Arm Triangle Choke — From Knee on Belly in competition?
Knee-on-belly to arm triangle is a common competition sequence at brown and black belt IBJJF events.
What are common mistakes when doing the Arm Triangle Choke — From Knee on Belly?
Top errors to watch for: Not trapping the arm tightly / Overcommitting weight forward (risking sweep) / Poor angle, resulting in crank instead of choke..
What are other names for the Arm Triangle Choke — From Knee on Belly?
The Arm Triangle Choke — From Knee on Belly is also known as Kata Gatame — From Knee on Belly, Knee-on-Belly Arm Triangle, KOB Kata Gatame, Knee Ride Head-and-Arm Choke.