SAFETY: Clock Choke targets the Carotid arteries and jugular veins. Risk: Carotid artery compression leading to loss of consciousness. Release immediately upon tap.
The Clock Choke is a highly effective gi-based blood choke primarily executed from turtle position, though it can also be applied from back control variations. The technique derives its name from the circular walking motion the attacker makes around the opponent’s head, resembling the movement of clock hands. This submission targets the carotid arteries using a combination of the opponent’s own gi lapel and precise body positioning. The Clock Choke represents an excellent example of using the gi as a force multiplier, creating a mechanical advantage that doesn’t require significant upper body strength. The technique is particularly valuable because it can be executed when traditional back takes are defended, offering an alternative finishing option from turtle and transition positions. Many practitioners overlook the Clock Choke in favor of taking the back, but experienced grapplers recognize it as a high-percentage finish that capitalizes on the opponent’s defensive posture in turtle.
From Position: Turtle (Top)
Key Attacking Principles
- Control the near side collar deep with full grip before initiating the choke
- Walk your feet in a circular path around opponent’s head to create rotational pressure
- Keep your hips close to opponent’s body to prevent escape and maintain pressure
- Use your chest and body weight against the back of opponent’s head to seal the choke
- The choking pressure comes from the rotation and body positioning, not arm strength
- Maintain base throughout the circular motion to prevent counter-sweeps
- The opponent’s own shoulder acts as the secondary pressure point against their neck
Prerequisites
- Opponent is in turtle position or transitioning from guard recovery
- You have secure control of opponent’s near side collar, fed deep across their neck
- Your opposite arm controls opponent’s far side or controls their hip to prevent rolling
- You are positioned on opponent’s side, not directly behind them
- Opponent’s head is relatively low to the mat (not posturing up)
- You have established sufficient base to begin walking motion without being swept
Execution Steps
- Establish collar grip: From turtle position or while opponent is defending back control, feed your hand deep into opponent’s near side collar, getting at least four fingers inside. Your grip should be palm-down with the blade of your forearm positioned against the side of their neck. This initial grip is crucial - without depth, the choke will not be effective regardless of your subsequent positioning. (Timing: 2-3 seconds to establish proper depth)
- Control far side: With your free hand, reach over opponent’s back and establish control of their far side hip, belt, or far side collar. This control prevents them from rolling away from you during the choke sequence. Maintain heavy chest pressure on their back. Your body weight should be distributed to make escape difficult while maintaining your own base. (Timing: 1-2 seconds)
- Begin walking motion: Start walking your feet in a circular path around opponent’s head, moving in the direction of your choking arm (if gripping right collar, walk clockwise). Keep your steps small and controlled, maintaining constant pressure throughout. Your hips should stay low and close to opponent’s body. Think of your body as a lever rotating around your collar grip as the pivot point. (Timing: 2-4 seconds for initial quarter circle)
- Increase rotational pressure: As you continue walking, your body rotation creates increasing pressure on opponent’s neck. The combination of your collar grip, their own shoulder, and the rotational force compresses the carotid arteries. Continue walking until you are nearly perpendicular to opponent’s body or past that point. Your chest should be pressing against the back of their head, adding additional pressure. (Timing: 2-3 seconds of progressive walking)
- Final adjustment and squeeze: Once you’ve achieved maximum rotation (typically when you’re past perpendicular to opponent’s body), make final adjustments. Drive your chest into the back of opponent’s head while pulling with your collar grip. Your free arm can now reinforce the choke by grabbing your own wrist or by continuing to control opponent’s far side. The pressure should increase gradually and progressively. (Timing: 1-2 seconds for final positioning)
- Secure the finish: Maintain all pressure points: collar grip, chest pressure against their head, hip pressure against their body, and rotational tension. Your body should be configured so that any attempt by opponent to turn or roll only tightens the choke. Wait for the tap, applying pressure progressively and never explosively. If opponent attempts to roll, maintain your grips and continue your circular motion to stay on top. (Timing: 3-5 seconds until tap)
Possible Outcomes
| Result | Position | Probability |
|---|---|---|
| Success | game-over | 58% |
| Failure | Turtle | 27% |
| Counter | Closed Guard | 15% |
Opponent Defenses
- Opponent tucks their chin tightly to block collar access (Effectiveness: High) - Your Response: Use your free hand to grip under opponent’s chin or use collar grips to peel their chin up before feeding your primary choking hand deeper. Alternatively, wait for movement when they attempt to advance from turtle - defensive postures naturally open briefly during transitions. → Leads to Turtle
- Opponent rolls forward (granby roll) toward your choking arm to relieve pressure (Effectiveness: Medium) - Your Response: Follow the roll by continuing your circular motion, staying connected to opponent’s body. Often the roll actually helps complete your walking motion. Maintain your collar grip and chest connection throughout. You may need to post with your free hand to avoid being reversed. → Leads to Turtle
- Opponent posts with their far arm and pushes into you to prevent rotation (Effectiveness: Medium) - Your Response: Use your free hand to strip opponent’s posting arm or control their far hip more aggressively. Alternatively, momentarily release hip pressure to allow opponent to turn slightly, then re-establish control once you have better angle. Sometimes stepping over opponent’s arm can eliminate the post. → Leads to Turtle
- Opponent drops to their side and attempts to turn into you (Effectiveness: Low) - Your Response: This movement often makes the choke tighter. Maintain your collar grip and continue your circular motion. As they turn, your chest pressure and rotational force increase. Follow their movement and secure the submission as they complete the turn. → Leads to game-over
- Opponent grabs your choking arm with both hands to strip the grip (Effectiveness: Medium) - Your Response: Once the choke is properly positioned, grip fighting becomes less effective for defense. Continue walking and applying rotational pressure - the mechanics of the position make grip stripping difficult. Focus on keeping your elbow tight and your collar grip deep. Your free hand can control opponent’s grip fighting hands. → Leads to Turtle
Test Your Knowledge
Q1: What is the minimum time you should allow for a training partner to recognize and tap to the Clock Choke, and why is this critical? [SAFETY-CRITICAL] A: You must allow minimum 3-5 seconds for progressive pressure application in training. This is critical because blood chokes can cause loss of consciousness if held too long, and the rotational nature of the Clock Choke means it can tighten very quickly. The gradual application gives your partner time to recognize the danger, assess their escape options, and make a safe decision to tap. Applying it explosively denies them this decision-making time and significantly increases injury risk.
Q2: Why must you immediately release the collar grip upon receiving a tap signal during the Clock Choke? [SAFETY-CRITICAL] A: Immediate release is essential because the Clock Choke is a blood choke that restricts blood flow to the brain via carotid artery compression. If maintained even a few seconds after someone should tap, it can cause loss of consciousness. Brain damage can occur from prolonged oxygen deprivation, and the rotational pressure also stresses the cervical spine. The moment you feel or hear a tap, you must release the collar grip and remove your body weight to restore blood flow. This is your responsibility as the person applying the submission, even in competition settings with referees present.
Q3: What are the two primary structural components that create the choking pressure in the Clock Choke, and how do they work together? A: The two primary components are the collar grip across one side of the neck and the opponent’s own shoulder acting as the secondary pressure point on the other side. The choking mechanism is completed by your rotational walking motion which creates tension in the collar material while simultaneously driving opponent’s shoulder into their neck. Your chest pressure against the back of their head seals this closed system. This triangulated pressure compresses both carotid arteries simultaneously, making it a highly effective blood choke that doesn’t rely primarily on arm strength.
Q4: Why is collar grip depth more important than walking speed when executing the Clock Choke? A: Collar grip depth is fundamental because it determines whether the choke has structural integrity. A deep four-finger grip with your forearm across the side of opponent’s neck creates the proper blade position to compress the carotid artery. Without this depth, no amount of walking or body pressure will create an effective choke - you’ll simply be pulling on fabric without affecting blood flow. Walking speed is secondary; even slow, controlled walking with proper collar depth will secure the submission, while rapid walking with shallow grip will fail. The principle is setup over speed.
Q5: What is the purpose of controlling the opponent’s far side during the Clock Choke execution? A: Controlling the far side (hip, belt, or collar) serves multiple critical functions. First, it prevents opponent from rolling away from the pressure, which is their highest-percentage escape. Second, it helps you maintain balance during your walking motion so you don’t get swept. Third, it allows you to keep your body weight distributed on opponent, making other escapes difficult. Finally, it gives you a reference point for maintaining proper positioning throughout the submission sequence. Without this control, opponent can simply roll away, negating your collar grip and walking motion entirely.
Q6: How should you adjust your Clock Choke when an opponent attempts a granby roll defense? A: When opponent granby rolls toward your choking arm, you should maintain your collar grip and continue your circular walking motion, essentially following their roll. Often the roll actually assists in completing your rotation and can tighten the choke. Keep your chest connected to the back of their head and stay heavy throughout the motion. You may need to post with your free hand momentarily to maintain base, but your primary focus is maintaining the collar grip and body connection. Many practitioners make the mistake of releasing pressure during the roll, but the rotation actually works in your favor if you stay connected.
Q7: What physical indicators tell you the Clock Choke is properly locked and the opponent has reached the point of no escape? A: The choke is properly locked when you feel the collar material tight across the carotid artery with no slack, your forearm blade is firmly pressed into the side of their neck, and your chest is driving their head forward into the choke. The point of no escape occurs when you’ve walked past perpendicular to their body and their own shoulder has become trapped against their neck on the opposite side. At this point, any movement they make - rolling, turning, or posturing - actually increases the choking pressure rather than relieving it. You’ll often feel their body become less resistant as blood flow restriction begins.
Q8: Your opponent begins posturing up and creating space while you’re attempting the Clock Choke - what adjustment secures the finish? A: When opponent postures up, immediately drive your chest weight down harder onto their upper back and the back of their head to re-flatten them. Simultaneously, pull your collar grip tighter while continuing your circular walking motion. If they create significant space, you may need to momentarily abandon the walking motion to re-establish heavy chest pressure, then resume once they’re flattened. The key is never allowing space between your chest and their back - that space is what enables their postural defense. Consider also controlling their far hip more aggressively to prevent them from pushing off the mat.
Q9: What grip adjustment should you make during the finish when your initial collar grip starts slipping? A: If your collar grip begins slipping during the finish, immediately use your free hand to reinforce the grip by grabbing your own wrist (gable grip style) or by gripping the gi material near your choking hand. Do not release and re-grip with your choking hand - this creates a window for escape. Alternatively, you can adjust by pulling your elbow tighter to your body and driving your forearm deeper across the neck. In competition, you can also transition to a two-on-one grip configuration, sacrificing far-side control for maximum choking pressure. The key is maintaining constant pressure throughout any grip adjustment.
Q10: How do you recognize when the Clock Choke is a blood choke versus an air choke, and why does this distinction matter for finishing? [SAFETY-CRITICAL] A: A properly executed Clock Choke is a blood choke targeting the carotid arteries, not an air choke targeting the trachea. You know it’s a blood choke when your forearm blade is positioned on the side of the neck rather than across the front, and when opponent’s face begins changing color (reddening) rather than them gasping for air. This distinction matters because blood chokes work much faster (3-8 seconds to unconsciousness) but are also safer as they don’t damage the trachea. If you feel the choke is positioned across the front of the throat, adjust by rotating your grip and body angle to target the side of the neck instead.
Q11: In competition, what finishing strategies maximize your Clock Choke success rate when the opponent is defending strongly? A: In competition, chain the Clock Choke with other attacks to create dilemmas. If opponent defends the choke by turning toward you, transition to taking their back with hooks. If they defend by posting the far arm, threaten the arm with a kimura or transition to crucifix. The walking motion itself can be used to tire the opponent - continue walking in circles while maintaining pressure, forcing them to expend energy defending. Also consider the rolling Clock Choke variation when they’re bracing hard against the traditional setup. Finally, use the edge of the mat strategically - opponents near the boundary cannot roll away, making the choke significantly higher percentage.
Q12: What are the breaking point indicators that signal the Clock Choke is about to produce a tap or unconsciousness? [SAFETY-CRITICAL] A: Key breaking point indicators include: opponent’s defensive hand fighting becomes weaker and less coordinated, their body begins to relax or go limp, visible color change in their face (reddening or darkening), their breathing becomes labored or stops momentarily, and their resistance to your rotation decreases noticeably. You may also feel small involuntary twitches or their body settling into the mat. When you notice these signs, maintain steady pressure - do not increase explosively. In training, these are critical signals to be prepared for an immediate tap or to release if training partner becomes unresponsive. Always err on the side of safety.