SAFETY: Belly Down Armbar from New York targets the Elbow joint hyperextension and ulnar collateral ligament. Risk: Elbow hyperextension with ligament damage to the ulnar collateral ligament. Release immediately upon tap.
The belly down armbar finish from New York leverages the deep overhook control inherent to 10th Planet’s Rubber Guard system to isolate and hyperextend the opponent’s elbow from a mechanically dominant prone position. Unlike standard armbar finishes where the attacker remains supine with hips elevated, the belly down variation rotates the attacker face-down on the mat, creating a wedge effect against the trapped elbow that is extraordinarily difficult to defend once fully locked. The overhook established in New York provides the initial arm isolation that makes this transition seamlessly available without the typical armbar setup sequence of fighting for wrist control.
The strategic value of this finish from New York specifically lies in the element of deception and the smooth transition from guard retention to submission. Most opponents defending New York anticipate choke setups toward Invisible Collar or leg-based transitions to Chill Dog and Zombie. The armbar path catches defenders oriented toward the wrong threat axis entirely. The overhook already accomplishes the hardest part of any armbar attack: trapping and isolating a single arm away from the defender’s centerline, meaning the attacker can skip directly to leg positioning and rotation.
Biomechanically, the belly down finish multiplies the attacker’s leverage by converting hip bridge force into rotational torque against the hyperextended elbow. The prone position eliminates the most common armbar escape where the defender stacks the attacker and extracts the arm overhead. Once the rotation is complete and the attacker is face-down with the arm pinned between their thighs, the defender has no viable stacking angle and the mechanical advantage ratio exceeds 5:1 against the elbow joint. The finishing pressure requires minimal energy since gravity assists rather than opposes the extension force.
Category: Joint Lock Type: Arm Lock Target Area: Elbow joint hyperextension and ulnar collateral ligament Starting Position: New York From Position: New York (Bottom) Success Rate: 50%
Safety Guide
Injury Risks:
| Injury | Severity | Recovery Time |
|---|---|---|
| Elbow hyperextension with ligament damage to the ulnar collateral ligament | CRITICAL | 3-6 months, may require surgical reconstruction |
| Elbow joint capsule sprain or partial tear from forced extension | High | 4-12 weeks depending on severity |
| Biceps tendon strain or partial tear from resisting extension under load | Medium | 2-6 weeks with progressive rehabilitation |
| Distal humerus stress fracture from sustained pressure against locked elbow | High | 6-10 weeks with immobilization |
Application Speed: SLOW and progressive. The belly down position creates significant mechanical advantage that can damage the elbow extremely quickly. Apply extension gradually and allow adequate time for the tap. Never jerk or spike the arm. The prone position amplifies force beyond what most practitioners expect.
Tap Signals:
- Verbal tap saying ‘tap’ or any distress vocalization
- Physical hand tap on partner, mat, or own body
- Physical foot tap on mat with either leg
- Any screaming, grunting, or unusual vocalization indicating distress
Release Protocol:
- Release immediately upon any tap signal without waiting for confirmation or repetition
- If in doubt whether a tap occurred, release immediately - the position can be re-established safely
- Release extension pressure first by lowering the wrist, then release knee squeeze, then disengage completely
- Monitor training partner’s arm mobility after release and check for signs of injury before continuing
Training Restrictions:
- Beginners should practice mechanics at 50% pressure maximum until transition control is consistent
- Always apply extension slowly in training - never jerk or spike the arm during the belly down finish
- Do not apply this technique on training partners with known elbow injuries or recent arm submissions
- Practice the transition rotation separately from the finishing pressure until both components are reliable
Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | game-over | 50% |
| Failure | New York | 32% |
| Counter | Closed Guard | 18% |
Attacker vs Defender
| Attacker | Defender | |
|---|---|---|
| Focus | Execute and finish | Escape and survive |
| Key Principles | The overhook must be deep around the tricep before initiatin… | Early recognition is survival - once the belly down rotation… |
| Options | 7 execution steps | 4 defensive options |
Playing as Attacker
Key Principles
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The overhook must be deep around the tricep before initiating the armbar sequence - shallow overhooks allow extraction during transition
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Leg positioning over the opponent’s head must happen before releasing the shin grip to prevent posture recovery
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Commit fully to the belly down rotation once initiated - half-rotations create escape opportunities
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Squeeze knees together throughout the entire sequence to maintain arm isolation during all transition phases
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Control the wrist with both hands before rotating - losing wrist control during the turn allows the opponent to bend their elbow and escape
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Use hip movement rather than upper body torque to drive the belly down rotation for maximum control retention
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Apply finishing pressure through hip elevation against the mat, not by pulling the arm - let gravity assist the hyperextension
Execution Steps
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Consolidate New York control: Verify your overhook is deep around the opponent’s tricep with your shoulder tight against their arm…
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Shoot outside leg over opponent’s head: Release your shin grip and swing your outside leg up and over the opponent’s head, placing your calf…
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Clamp arm between thighs: Squeeze both legs together tightly around the isolated arm, positioning the opponent’s elbow directl…
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Secure two-on-one wrist control: Release the overhook grip and immediately secure the opponent’s wrist with both hands, pulling the a…
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Hip escape to perpendicular angle: Shrimp your hips away from the opponent while maintaining the thigh clamp and wrist control, creatin…
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Rotate belly down: Commit to the belly down rotation by turning face-down toward the mat while keeping the arm pinned t…
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Finish with hip elevation: With your face toward the mat and the opponent’s arm trapped thumb-up between your thighs, elevate y…
Common Mistakes
-
Releasing the overhook before the leg is fully positioned over the opponent’s head
- Consequence: Opponent recovers posture immediately and either extracts the arm or stacks forward to pass guard
- Correction: Maintain the deep overhook until your calf is fully seated across the back of the opponent’s neck - only then begin transitioning your overhook grip to wrist control
-
Incomplete belly down rotation leaving the attacker on their side rather than fully prone
- Consequence: The opponent retains stacking angles and can drive into the half-rotated attacker to extract the arm or sweep to top position
- Correction: Commit fully to the rotation by driving your hips through to face completely toward the mat - your chest and face should end pointing straight down, not to the side
-
Loose knee squeeze during the rotation phase allowing the arm to shift position
- Consequence: The opponent’s elbow slides off the hip fulcrum, eliminating the hyperextension angle and allowing them to bend the elbow and escape
- Correction: Maintain maximum adductor squeeze throughout the entire rotation, actively pinching your knees together as your primary focus during the turn
Playing as Defender
Key Principles
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Early recognition is survival - once the belly down rotation is complete, escape probability drops below 15%
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Protect the elbow angle by keeping the arm bent at all times during escape attempts rather than straightening to push away
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Posture recovery before arm extraction - without posture, pulling the arm free is mechanically impossible against a deep overhook
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Stack the attacker when possible during the rotation phase to disrupt their belly down transition and create extraction angles
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Tap early and without hesitation if the belly down position is fully locked - the mechanical advantage makes damage extremely rapid
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Use the free hand to grip-fight the attacker’s shin-controlling hand, creating openings for posture recovery
Recognition Cues
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Attacker releases their shin grip and begins swinging their outside leg upward toward your head or neck from New York
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Attacker’s hips elevate and angle perpendicular to your body while maintaining the deep overhook, indicating arm isolation setup
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Attacker shifts from pulling your head down to controlling your wrist with both hands, signaling transition from guard control to submission
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Attacker’s leg crosses over your shoulder or neck creating the closed leg configuration around your trapped arm
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You feel rotational pulling on your trapped arm as the attacker begins turning face-down toward the mat
Escape Paths
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Extract the trapped arm by pulling the elbow back toward the hip while the attacker transitions from overhook to leg clamp, recovering to New York top or closed guard
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Stack and drive forward during the rotation phase to flatten the attacker and disrupt the belly down turn, then withdraw the arm and settle into closed guard top
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Hitchhiker escape by rotating the thumb toward the mat and spinning the body toward the trapped arm before the attacker secures full wrist control
From Which Positions?
Match Outcome
Successful execution of Belly Down Armbar from New York leads to → Game Over
All submissions in BJJ ultimately converge to the same terminal state: the match ends when your opponent taps.