Knee on Belly Submissions
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Standard Knee On Belly·Seiryoku Zenyo
Mark Gilston, 4th degree judo black belt, and Sean Cooper, 3 stripe BJJ black belt, demonstrate and discuss submissions …
Standard Knee On Belly
SubFamilyスタンダードニーオンベリー(Sutandādo Nī On Berī)
TransliterationTranslation: standard knee on belly
Overview
The Standard Knee On Belly subfamily covers the classic knee-on-belly position where the top fighter faces the opponent's head with one knee on the belly/midsection and the other foot posted for base. [1] Standard knee-on-belly is the primary version of this position, providing a balanced platform for pressure, submissions, and transitions. [1],[2] The position allows the top fighter to use gravity and bodyweight to create significant pressure while maintaining mobility for transitions to mount, side control, or the opposite side. [2],[3]
History & Origin
Effectiveness
Lineage
Knee on belly is a fundamental dominant position in BJJ, taught at all levels. [1]
Competition Record
Knee on belly scores 2 points in IBJJF competition. [1]
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Biomechanical Mechanism
Primary Action — Gravity-assisted top control — body weight pins the opponent's torso to the ground
Joints Involved — Attacker's hips (heavy base), knees (clamped for ride control), opponent's spine (pinned)
Force Vector — Downward — gravity plus active hip pressure maximises control and submission opportunities
Positional Mechanic — High mount raises the centre of gravity above the opponent's shoulder line, isolating their arms for attacks
Position & Entry
From guard pass completion — After passing the guard, establish mount by placing knees on either side of the opponent's torso
From sweep — Complete a sweep from guard and land directly in mount position on top
From side control (knee slide) — From side control, slide the knee across the opponent's belly and settle into mount
Videos
1 video
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Ratings
Risk of injury to the person this technique is applied to
3
Moderate3/10
Top positions enable pressure and striking; rib compression risk under heavy pressure
Skill level needed to execute this technique reliably
Intermediate
Whether this technique is allowed under major competition rule sets
— IBJJF — Legal, knee on belly scores 2 points
IBJJF Rules Book v6.0, June 2024PDF— ADCC — Legal, knee on belly scores 2 points
ADCC Rules Update, April 2025PDF— Unified MMA — Legal dominant position
Unified Rules of MMA, August 2025PDF— UWW — Legal, back exposure scores points, pin ends match ...
UWW International Wrestling Rules, January 2026PDF— FIAS Sport Sambo — Legal, pin scores points
FIAS International Sambo Competition RulesPDFTraining Notes
✓Standard knee on belly subfamily covers the fundamental configurations of knee-on-abdomen control — the primary knee on belly positions used in competition and MMA (Saulo Ribeiro, Jiu-Jitsu University, 2008)
✓Standard knee on belly placement: the knee is on the opponent's solar plexus, the shin is angled across their body, and the posting foot is wide for stability
✓The hands in standard knee on belly: near hand controls the collar (gi) or head (no-gi), far hand grips the belt or hip
✓Standard knee on belly is the starting point for the knee on belly system: from here, transition to near-side, reverse, or knee on chest
✓The reaction chain from standard knee on belly: opponent pushes the knee → armbar; opponent turns away → back take; opponent bridges → remount
✓Training knee on belly pressure: drill maintaining the position while the partner attempts to escape — the pressure must be sustained through movement
✓Standard knee on belly is one of the most practical positions in MMA: it provides control, striking, and disengagement options simultaneously
Common Mistakes
!Not maintaining knee pressure through movement — the knee must stay heavy even as the opponent moves
!Posting the far foot too close — the foot should be wide for maximum stability
!Gripping only with the hands without knee pressure — the knee is the primary control; grips are supplementary
!Not attacking from knee on belly — the position forces reactions; capitalize on them
!Losing balance when the opponent bridges — drive the knee down and widen the posting foot to absorb
!Not transitioning when knee on belly is lost — if the knee is pushed off, immediately return or advance to mount
!Staying on knee on belly indefinitely — it is a transitional position; use it to advance or finish
Related Techniques
Counter Techniques
Setup Chain
1Pass the Guard — clear the opponent's legs to advance to this dominant position
2Settle Weight — distribute body weight to maintain heavy pressure
3Control Arms — manage the opponent's arms to prevent frames and escapes
4Threaten Submissions — attack to force defensive reactions and maintain dominance
Sources & References
Primary Source
Mastering Jujitsu (Renzo Gracie & John Danaher, 2003)
1BookJiu-Jitsu University (Ribeiro, 2008)
Alias sources — [1] IBJJF Rules (2024) [2] Jiu-Jitsu University (Ribeiro, 2008) [3] Mastering Jujitsu (Gracie & Danaher, 2003)
2BookBrazilian Jiu-Jitsu: Theory and Technique (Gracie & Gracie, 2001)
Effectiveness sources — [1] Jiu-Jitsu University (Ribeiro, 2008) [2] Mastering Jujitsu (Gracie & Danaher, 2003)
3OtherJapanese Combat Sports Katakana Convention
Standard katakana transliteration of Western martial arts terminology (外来語) — used in Japanese MMA, boxing, and BJJ communities
4CitationJiu-Jitsu University (Ribeiro, 2008)
Alias sources — [1] IBJJF Rules (2024) [2] Jiu-Jitsu University (Ribeiro, 2008) [3] Mastering Jujitsu (Gracie & Danaher, 2003)
5CitationBrazilian Jiu-Jitsu: Theory and Technique (Gracie & Gracie, 2001)
Effectiveness sources — [1] Jiu-Jitsu University (Ribeiro, 2008) [2] Mastering Jujitsu (Gracie & Danaher, 2003)
Community
Athletics
Requires
base stability, heavy hips, ride ability
Favours
heavier build with strong hips for pressure
Key muscles
hip adductors, core, glutes, quadriceps
Sub-techniques
Frequently Asked Questions
How should I grip the collar when setting up a knee on belly submission?
Use a flat hand rather than a fist, and slide it up the collar without going too deep—if you're too deep, you won't catch the carotid properly. Seiryoku Zenyo emphasizes keeping the grip positioned correctly to ensure the submission works.
What's the correct way to position my knee when applying pressure in knee on belly?
Come from the top and lay your weight on your shin and the crook of the opponent's elbow, rather than attacking straight at them. This positioning is key to controlling the arm and applying effective pressure.
How do I keep my opponent stable once I have the collar grip?
Pull the collar down to stabilize your opponent, and make sure to keep your arm straight while walking towards their head to maintain control and prevent escape.
How does the Standard Knee On Belly work?
The Standard Knee On Belly subfamily covers the classic knee-on-belly position where the top fighter faces the opponent's head with one knee on the belly/midsection and the other foot posted for base. Standard knee-on-belly is the primary version of this position, providing a balanced platform for pressure, submissions, and transitions.
Where does the Standard Knee On Belly come from?
Standard knee-on-belly is the fundamental version of this position in BJJ, scored as a distinct positional achievement worth two points in IBJJF competition. It has been a core position in BJJ's positional hierarchy since the art's development.
Is the Standard Knee On Belly legal in competition?
IBJJF: legal — Legal, knee on belly scores 2 points; IJF: legal — Legal, osaekomi (pin) — 10-19 seconds scores waza-ari, 20 seconds scores ippon; ADCC: legal — Legal, knee on belly scores 2 points; Unified MMA: legal — Legal dominant position; UWW: legal — Legal, back exposure scores points, pin ends match by fall; FIAS Sport Sambo: legal — Legal, pin scores points
How dangerous is the Standard Knee On Belly?
Danger rating 3/10. Moderate — top positions enable pressure and striking; rib compression risk under heavy pressure
How do I set up the Standard Knee On Belly?
The standard setup chain: Pass the Guard → Settle Weight → Control Arms → Threaten Submissions.
How do I defend against the Standard Knee On Belly?
Standard counters include: Bridge (Upa) — explosive hip elevation to off-balance the top player / Elbow-Knee Escape (Shrimp) — create space by driving elbow to knee and hip-escaping / Frame — establish forearm frames to prevent the top player from settling weight.
What are the variants of the Standard Knee On Belly?
Common variants: Low mount (hips heavy on the opponent's belly, grapevines in for sta…); High mount (knees under the armpits, arms isolated for submissions); S-mount (one knee high under the armpit, other leg across for arm …); Technical mount (one leg hooked, one knee posted, modified for back-take t…).
How effective is the Standard Knee On Belly in competition?
Knee on belly scores 2 points in IBJJF competition.
What are common mistakes when doing the Standard Knee On Belly?
Top errors to watch for: Not maintaining knee pressure through movement — the knee must stay heavy even as the opponent moves / Posting the far foot too close — the foot should be wide for maximum stability / Gripping only with the hands without knee pressure — the knee is the primary control; grips are supplementary / Not attacking from knee on belly — the position forces reactions; capitalize on them.
What are other names for the Standard Knee On Belly?
The Standard Knee On Belly is also known as Sutandādo Nī On Berī, Standard Knee Ride, Basic Knee on Belly, Standard KOB.