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A chokehold, choke, stranglehold or, in Judo, shime-waza (Japanese: 絞技, lit. 'constriction technique')[1] is a general term for a grappling hold that critically reduces or prevents either air (choking)[2] or blood (strangling) from passing through the neck of an opponent. The restriction may be of one or both and depends on the hold used and the reaction of the victim. While the time it takes for the choke to render an opponent unconscious varies depending on the type of choke, the average across all has been recorded as 9 seconds.[3]

Key Information

The lack of blood or air often leads to unconsciousness or even death if the hold is maintained. Chokeholds are used in martial arts, combat sports, self-defense, law enforcement and in military hand to hand combat applications. They are considered superior to brute-force manual strangling, which generally requires a large disparity in physical strength to be effective.[4] Rather than using the fingers or arms to attempt to crush the neck, chokeholds effectively use leverage such as figure-four holds or collar holds that use the clothes to assist in the constriction.

The terminology used varies; in most martial arts, the term "chokehold" or "choke" is used for all types of grappling holds that strangle. This can be misleading as most holds aim to strangle not choke with the exception of "air chokes" (choking means "to have severe difficulty in breathing because of a constricted or obstructed throat or a lack of air"[2]). In Judo terminology, "blood chokes" are referred to as "strangleholds" or "strangles" while "air chokes" are called "chokeholds" or "chokes".[1] In forensics, the terms "strangle" and "stranglehold" designate any type of neck compression,[4] while in law-enforcement they are referred to as "neck holds".[5]

Air choke

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An air choke (or tracheal choke) specifically refers to a "true" choke that compresses the upper airway (trachea, larynx or laryngopharynx), hence interfering with breathing and leading to asphyxia. Although less effective at inducing unconsciousness than its vascular counterpart, the air choke causes excruciating pain and air hunger, and in combat sports a fighter will usually yield to such a submission hold. Air chokes have been associated with fractures of the larynx or hyoid bone, and are considered less safe than blood chokes to practice.[citation needed]

Blood choke

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Blood chokes (also known as sleeper holds or carotid restraints) are a form of strangulation that compress one or both carotid arteries and/or the jugular veins without compressing the airway, hence causing cerebral ischemia and a temporary hypoxic condition in the brain.[6] Compared to strangulation with the hands, properly applied blood chokes require little physical strength.

Use in combat sports

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Most chokeholds featured in combat sports and martial arts are blood chokes, although some air chokes or combinations occur as well. Blood chokes, especially the rear naked choke, triangle chokes, or gi chokes, are commonly used as submission holds in Brazilian jiu-jitsu. In judo, chokeholds, known as shime-waza, are often subject to restrictions based on age or rank. Chokeholds are not allowed in sport sambo but are allowed in combat sambo. The chokeholds used in catch wrestling and shoot wrestling are the inspiration for the "chokeholds" in modern professional wrestling performances. Due to the effectiveness of chokeholds and their popularity in a wide variety of martial arts, they are most often used to force submissions in mixed martial art and submission grappling competitions.

Some martial arts include instruction on kappo, resuscitation techniques to heal a fighter choked to unconsciousness.

Use in law enforcement (lateral vascular neck restraint)

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In law enforcement the goal is to force an uncooperative subject to submit without causing death or permanent injury. In this situation it is vital to distinguish between air and blood chokes. A hold that simultaneously blocks both the left and right carotid arteries results in cerebral ischemia and loss of consciousness within seconds. If properly applied, the hold produces almost immediate cessation of resistance. However to avoid injury the hold cannot be maintained more than a few seconds. When pressure on the carotids is released, the flow of oxygenated blood resumes immediately and consciousness slowly returns. In contrast, if the airway rather than the carotid arteries is blocked, the subject cannot breathe, but his brain is still perfused with blood and he will remain conscious and may continue to struggle for a minute or more; he will lose consciousness only when the oxygen in the circulating blood is consumed and he collapses from hypoxia. Even if the hold is released at this point, the blood circulating through the brain contains no oxygen, and consequently the subject may not regain consciousness or resume spontaneous breathing. Possibly the most important element of training for the use of chokeholds in law enforcement is the understanding that the subject should always be able to breathe freely. The operator uses his right arm to compress both sides of the subject's neck, assisted by the pressure of his left hand, while his elbow, sharply flexed and centered over the midline, places no pressure on the trachea.[7]

Following a series of choking deaths, the Los Angeles Police Department banned chokeholds in 1980, and was soon followed by police departments nationwide. Choking suspects was widely banned by American police departments by the early 1990s, when New York City strengthened the force of an earlier ban on chokeholds.[8] (It is also forensically known as a "carotid sleeper".)[9]

Despite the ban, in 2014, NYPD police killed Eric Garner by administering the prohibited hold. Garner was assaulted on suspicions of selling cigarettes without tax stamps, although he was not doing so. While being in the chokehold and restrained by multiple officers, he repeated the words "I can't breathe" 11 times while lying face down on the sidewalk. Garner lost consciousness and died approximately an hour later; his autopsy revealed that his death was a result of "[compression] of neck, compression of chest and prone positioning during physical restraint by police."[10] His death and quote became a prominent factor of Black Lives Matter protests, a social movement originating in 2013[11][12] and becoming most popular during the George Floyd protests in 2020 following his murder by Minneapolis police officer Derek Chauvin.[13][14] In response, the George Floyd Justice in Policing Act of 2021 was introduced, part of its statutes including prohibiting federal police officers from using chokeholds or other carotid holds, along with state and local law enforcement agencies that receive federal funding.[15][16]

Types

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  • Anaconda choke – Choke starting with attacker facing the opponent on all fours. Attacker passes his leading arm under the neck, and outside past one of the opponent's arms while then grabbing his own other arm's free arm biceps (resulting in similar arm positioning to a rear naked choke). The attacker then arches his back, bending backward to apply the choke.
  • Arm triangle choke – Choke starting with the attacker facing the opponent. The attacker passes the arm over the opponents same-side shoulder and across the back to the other shoulder. The attacker then positions the opponents arm across their neck and traps it using their head and applies pressure. May be performed from the top, or the bottom.
  • D'arce choke – the D'Arce choke, also known as the Brabo choke, is similar to the anaconda choke, the main divergence being the choking arm is threaded under the near arm, in front of the opponent's neck, and on top of the far arm.
  • Ezekiel choke – Attacker grabs inside their own sleeve around opponent's neck.
  • Gogoplata – Performed from full guard by using an omoplata setup to trap the top man's arm, then pulling the bottom man's foot past the top man's head, pressing the shin of that leg against the throat. The bottom man then pulls on his opponent's head, cutting off the airflow and forcing him to submit or risk passing out from lack of oxygen.
  • Guillotine – Applied in front of and above the opponent, the attacker restricts air flow by lifting the forearm into the neck. A common finishing hold in mixed martial arts.[17]
  • North–south choke – Applied from the north-south position with opponent facing up. Uses the shoulder and biceps to cut off air flow.
  • Rear naked choke – Applied from behind the opponent, starting by looping one arm around the neck so that the crook of the elbow is under the opponents chin, then placing the hand of that arm on the opposite biceps. The other hand is then placed on the back of the opponent's head and pushes the opponent's head and neck forward into the crook of the flexed arm. Additional pressure may be applied by pinioning the opponent's lower body by locking the legs around the opponent's waist (referred to as "hooks") and arching the back to place more force against the neck. A simple and effective chokehold, it is the most common finishing hold in mixed martial arts competition.[17]
  • Triangle choke – Applied from full guard or from mount, the opponent's neck is trapped in a triangle formed by their own arm and the attacker's thigh and calf. A common finishing hold in mixed martial arts.[17]
  • Peruvian necktie – the arms of the person applying the choke are laced around the neck with the opponent's bottom arm straight through the hold, the person applying then turns the opponent around, and drapes his legs over the back, applying the pressure to the choke.
  • Von Flue choke – Alternatively known as the Saint Preux choke or Von Preux Choke, this choke is mostly used in MMA, and some rare instances in wrestling. Because of the rarity of its use, it is often overlooked in its effectiveness. The choke is applied with the opponent in a supine position, with his back against the mat. The person applying then laces his closest arm around the back of the head, and places his entire body weight against the neck, causing both air constriction, and restriction of blood flow to the brain. Prolonged applying of this hold can result in loss of consciousness, either due to loss of blood flow to the brain, or loss of air to the lungs. The choke gets its name from Jason Von Flue, who spearheaded the move, as well as Ovince Saint Preux, who popularised it within the UFC. He also won 4 fights using the method, when there have ever only been 8 finishes by Von Flue chokes in the UFC.
  • Bulldog choke – The bulldog choke is a catch wrestling strangulation. The bulldog choke works the same as a rear naked choke, except it occurs on the side of the opponent, not behind. The attacker's biceps will block one side of the neck and the forearm will block the other. For loss of consciousness to occur, the structure need to be compressed.

Grips

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One powerful way to grasp the arms together when doing front headlocks is the Gable grip. Named after wrestler Dan Gable, it involves clasping the hands together, palm to palm, at a ninety degree angle, with thumbs tucked in.

See also

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References

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Further reading

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Revisions and contributorsEdit on WikipediaRead on Wikipedia

Chokehold

View on Grokipedia
from Grokipedia
A chokehold is a grappling technique that applies sustained pressure to an opponent's neck to restrict either blood flow through the carotid arteries or airflow via the trachea, typically inducing submission or unconsciousness through cerebral hypoxia. Distinguished primarily by their physiological mechanisms, blood chokes (or vascular strangles) compress the carotid arteries and jugular veins, reducing cerebral perfusion and causing rapid onset of symptoms such as visual disturbance, auditory changes, and loss of consciousness within seconds to a minute, with quick recovery upon release if no underlying conditions exist. In contrast, air chokes impede respiration by occluding the airway, eliciting intense pain and reflexive resistance but carrying higher risks of tracheal injury or long-term damage due to greater force requirements and potential for panic-induced struggle. Employed extensively in martial arts disciplines like Brazilian jiu-jitsu, judo, and mixed martial arts for safe, controlled submissions—where trained participants signal surrender via tapping—these holds demonstrate high efficacy in neutralizing threats without strikes, supported by empirical observations of minimal adverse outcomes in athletic contexts. In law enforcement, vascular neck restraints have been utilized as non-lethal alternatives to escalate force, with peer-reviewed analyses and medical reviews affirming their safety and effectiveness when applied by trained officers, revealing complication rates far lower than popularly portrayed despite selective media emphasis on rare fatalities often confounded by factors like drug intoxication or pre-existing health issues. Controversies arise from conflation of technique types and applications, leading to widespread bans in policing post-high-profile incidents, though causal evidence underscores that proper blood chokes pose negligible risk of death absent misuse or subject vulnerabilities, challenging narratives of inherent lethality.

Fundamentals

Definition and Classification

A chokehold is a technique employed in , combat sports, and to subdue an opponent by applying pressure to the , thereby restricting either through the trachea or flow through the carotid arteries and jugular veins, resulting in rapid submission or . The mechanism exploits the vulnerability of the neck's vascular and respiratory structures, requiring minimal force—approximately 10 pounds of pressure on the carotids—to impair cerebral and induce hypoxia. Chokeholds are physiologically classified into two main categories: tracheal chokes, also known as air chokes, which compress the windpipe to obstruct , and vascular chokes, or blood chokes, which constrict the major vessels to deprive the of oxygenated . Tracheal chokes typically provoke intense discomfort and panic due to asphyxiation, taking longer—often 10-20 seconds or more—to cause , whereas vascular chokes act swiftly, within 5-10 seconds, by reducing cerebral flow without directly impeding respiration. Some techniques incorporate elements of both, termed hybrid chokes, applying concurrent pressure to the airway and vasculature for enhanced efficacy. In contexts, often distinguishes "chokeholds" as tracheal restraints prohibited in many jurisdictions due to risks of , while vascular neck restraints are sometimes permitted as less lethal options when applied correctly to avoid airway compression. This classification reflects empirical observations from medical and forensic analyses, emphasizing that vascular chokes induce reversible unconsciousness via cerebral ischemia rather than the sustained hypoxia and potential tracheal damage associated with air chokes.

Physiological Mechanisms

Chokeholds are classified into vascular (blood) chokes, which primarily compress the carotid arteries to restrict cerebral blood flow, and tracheal (air) chokes, which obstruct the airway to impair respiration. Vascular chokes induce unconsciousness through cerebral ischemia by reducing blood flow to the brain, typically achieving an 80-85% decrease in carotid blood flow within 6-10 seconds when properly applied. This mechanism lowers cerebral perfusion pressure, leading to rapid onset of hypoxia despite intact oxygenation from residual blood in cerebral vessels. In blood chokes, bilateral compression of the carotid arteries diminishes delivery of oxygenated blood to the , with compression potentially contributing by elevating and further reducing net cerebral flow. Loss of occurs in 7-14 seconds due to this ischemia, faster than air chokes, as the consumes oxygen rapidly under normal conditions and cannot sustain function without continuous supply. Secondary effects may include vagal nerve stimulation from carotid sinus pressure, causing or , though primary causality remains vascular occlusion. Tracheal chokes exert pressure on the or trachea, collapsing the airway and preventing , which results in progressive hypoxia, , and asphyxiation over a longer timeframe, often 10-30 seconds or more to incapacitation. Unlike vascular mechanisms, this directly limits oxygen intake rather than circulation, leading to systemic desaturation and potential laryngeal damage from sustained compression. Prolonged application of either type risks irreversible ; vascular holds beyond 10-20 seconds can cause neuronal from sustained ischemia, while tracheal compression heightens chances of airway or vascular , potentially culminating in or . Empirical studies on controlled applications confirm reversibility if released promptly, with no significant long-term carotid intima-media thickening observed in athletes after repeated transient exposures.

Historical Development

Origins in Martial Arts

Chokeholds, techniques that constrict the to impair breathing or blood circulation, trace their origins to ancient combat practices where they served as non-lethal or lethal methods of subduing adversaries. In wrestling and —a hybrid of and wrestling introduced to the [Olympic Games](/page/Olympic Games) in 648 BC—strangleholds formed a core component of ground-based submissions. Historical texts describe competitors applying pressure to the opponent's to force yielding, with the first-century AD Roman poet detailing choking maneuvers in wrestling, and alluding to strangles used in training to simulate combat pressure. Such techniques emphasized leverage and anatomical targeting, reflecting early empirical understanding of vascular and respiratory vulnerabilities, though often risking fatality as seen in the pankratiast Arrachion's death circa 564 BC from an opponent's applied choke during a match. Pankration's allowance of most holds except and enabled diverse chokes, including rear and frontal applications, distinguishing it from stricter wrestling rules that prohibited ground strangulations in standing variants. These methods influenced later Mediterranean and European traditions, prioritizing control over strikes for prolonged engagements. Evidence from vase paintings and literary accounts confirms chokes' prevalence in both athletic and military contexts, where silent incapacitation proved advantageous against armored foes. In , chokeholds evolved within formalized martial systems during Japan's feudal era. (jūjutsu), emerging around the 15th–16th centuries as unarmed countermeasures to weaponry, categorized neck constrictions under shime-waza (strangling techniques). Early ryūha (schools) like , established in 1532 by Takenouchi Hisamori, integrated shime-waza for battlefield restraint, including hadaka jime—a bare-arm encircling hold targeting carotid arteries, akin to the . This reflected causal adaptation to close-quarters combat, where disrupting cerebral blood flow induced rapid without alerting nearby enemies, as opposed to noisier strikes. texts emphasize precise execution to avoid mutual harm, drawing from empirical trial in and warfare. Subsequent refinements in , derived from by Jigoro Kano in 1882, preserved and codified shime-waza, distinguishing blood chokes (e.g., compressing arteries for 5–10 seconds to ) from air chokes (blocking trachea for longer durations). While specific variants like the (sankaku-jime) emerged later in early 20th-century Kodokan judo, core principles stemmed from jujutsu's emphasis on efficiency against larger opponents. These Asian developments paralleled global wrestling lineages, underscoring chokeholds' universal appeal in for their biomechanical reliability over brute force.

Adoption in Law Enforcement and Military


Chokeholds entered U.S. law enforcement training in the mid-20th century, drawing from judo and karate techniques adapted for officer safety amid rising urban violence. By the 1970s, vascular neck restraints—aimed at compressing carotid arteries to induce unconsciousness—were taught in academies as a non-lethal option for controlling combative suspects, with anecdotal reports confirming their inclusion in curricula as early as 1977. Departments like the Los Angeles Police Department routinely employed bar-arm and carotid holds until a cluster of 16 custody deaths in 1980-1982, predominantly involving minority suspects, prompted restrictions on certain variants in 1982. In the military, chokeholds featured in hand-to-hand combat instruction as early as through "dirty fighting" systems emphasizing quick incapacitation, but formal integration accelerated post-Vietnam with influences. The U.S. Marine Corps adopted the Linear Infighting Neural-override Engagement (LINE) system in 1989, incorporating choke techniques alongside strikes for close-quarters survival, before transitioning to the Marine Corps Martial Arts Program (MCMAP) in 2001, which standardized blood chokes in recruit training to build proficiency. The U.S. Army's Modern Army Program (MACP), initiated in 1995 by the under Matt Larsen and rolled out Army-wide by 2002, marked a pivotal adoption of Brazilian jiu-jitsu-derived chokes, including the , prioritizing ground control and submissions over strikes alone. This shift responded to operational data from showing grappling's efficacy in non-lethal restraint and enemy neutralization, with MACP training emphasizing progressive levels up to instructor certification. and other branches followed suit, adopting MACP elements by 2008 for standardized .

Techniques

Blood Chokes

Blood chokes, also known as vascular strangles or carotid restraints, restrict flow to the by compressing the carotid arteries and jugular veins on the sides of the neck, inducing cerebral ischemia without primarily obstructing the airway. This mechanism deprives the of oxygenated , leading to rapid , often within 5 to 14 seconds when fully applied against a resisting opponent. Unlike air chokes, which compress the trachea and require sustained effort to cause hypoxia via asphyxiation, blood chokes achieve incapacitation more efficiently due to the vulnerability of vascular structures, with studies showing up to an 85% reduction in carotid flow within seconds of compression. In grappling arts such as and , blood chokes target the carotid sinuses bilaterally to maximize flow restriction, with proper execution minimizing pressure on the spine or trachea. Common techniques include the (hadaka-jime in ), where the practitioner's arm encircles the opponent's neck from behind, with the biceps and forearm forming a around the carotids; the , utilizing leg entanglement to apply similar vascular pressure; and the , executed from front or guard positions by trapping the neck in an arm lock that compresses the arteries. These holds leverage biomechanical leverage for control, with the noted for its reliability in restricting approximately 90% of cerebral blood flow when seated deeply. Physiologically, effective blood chokes trigger activation in the carotid sinuses, initially causing and , followed by global cerebral hypoperfusion if sustained, resulting in loss of consciousness without significant or respiratory distress. Recovery is typically swift upon release, with trained individuals regaining in 10-20 seconds, though improper or prolonged application risks complications such as or ischemic , as documented in case reports from combat sports practitioners. Cross-sectional surveys of athletes indicate low incidence of serious from sportive chokes when taught and applied correctly, attributing to the technique's focus on transient vascular occlusion rather than crushing force.

Air Chokes

Air chokes, also known as tracheal chokes, apply direct pressure to the trachea or to obstruct into the lungs, distinguishing them from blood chokes that target vascular structures. This compression mechanically blocks the upper airway, preventing and , which leads to rapid oxygen deprivation in the body rather than isolated cerebral ischemia. Unlike blood chokes, which can induce in 5-10 seconds by halting arterial flow to the , air chokes typically require 10-30 seconds or more for similar effects due to the body's residual oxygen reserves and the gradual buildup of . The primary physiological impact involves hypoxia from denied pulmonary ventilation, prompting intense discomfort, reflexive gagging, and panic as the victim struggles to breathe. Prolonged application risks laryngeal , tracheal bruising, or , with potential for delayed complications such as airway or from mucosal damage. In martial arts contexts, practitioners often tap early from pain or air hunger before full asphyxiation occurs, though incomplete releases can still cause cumulative trauma over repeated exposures. Medical on non-fatal strangulation underscores that even brief tracheal compression elevates risks of or , far exceeding those of vascular-only techniques. Common techniques in (BJJ) and wrestling emphasize frontal or lateral neck control, such as the variant where the forearm drives into the trachea from a guard position, or the north-south choke using body weight to pin the airway. The , executed from rubber guard by pressing the shin across the opponent's throat, exemplifies a high-risk air choke that leverages leg leverage for sustained pressure but demands precise control to avoid slippage. Instructors generally advise against relying on air chokes in or competition due to their slower efficacy and higher potential compared to blood chokes, which prioritize safety and speed in subduing without structural damage. Despite this, air chokes persist in training for developing resilience to airway threats, with protocols stressing immediate release upon submission to mitigate long-term harm.

Grips and Execution

Chokehold grips vary by technique and positional control, with execution emphasizing leverage, body alignment, and precise pressure application to target either vascular or airway structures. In blood chokes like the (RNC), the standard grip positions one arm around the opponent's neck from behind, with the bicep aligned against the carotid arteries; the opposite hand then grips the executing arm's bicep or tricep, forming a figure-four clasp to lock the hold and prevent escape. Execution involves securing back control, tucking the chin if resisting, squeezing the elbows inward while expanding the chest, and leaning backward to compress the arteries, typically inducing within 5-10 seconds if fully applied. Variations in blood choke grips include the palm-to-palm clasp, where hands interlock behind the for added , or the hex grip, threading fingers between the choking arm and shoulder for enhanced security against defensive peeling. For air chokes, grips prioritize direct tracheal compression, often using the or edge of the hand across the in a standing or mounted position, with the supporting hand stabilizing the head or adding downward force. Execution demands rapid application to overcome , pulling the opponent forward while driving the elbow toward the opposite hip to pinch the windpipe, though this risks cervical injury and is slower in effect compared to vascular restriction. In techniques like the , which can function as either a or air choke depending on elbow positioning, the grip encircles the under the with one , securing by clasping the bicep or using a high- variation to redirect pressure toward the carotids or trachea. Proper execution from standing or guard positions involves threading the deeply, clasping hands or shoulder for control, and arching the hips upward to tighten the constriction, with -targeting alignments proving more efficient for submission. Across grips, maintaining straightness and avoiding loose positioning prevents slippage, while defensive counters like framing the highlight the need for seamless transitions in application.

Applications in Combat Sports

Prevalence in Martial Arts and MMA

Chokeholds are integral to grappling disciplines within , serving as primary submission methods in arts like (BJJ), , and sambo, where they target vascular or airway restriction to induce compliance or unconsciousness. In BJJ training sessions, 83.4% of athletes apply a choke to an opponent at least once per class, while 79.1% experience being choked similarly, averaging 1.7 applications per session across 3.9 weekly classes. These techniques emphasize positional control and leverage, with chokes comprising a majority of finishes in no-gi formats due to their efficiency against resisting opponents. In competitive BJJ and related events, chokes dominate submission outcomes; for instance, at the 2024 ADCC World Championships, 65% of submissions were chokes, reflecting their tactical prevalence in high-level no-gi . Judo incorporates shime-waza (strangulation techniques), including blood chokes like the rear-naked variant adapted from throws, though throws and pins often precede submissions in Olympic rulesets. Wrestling traditions, such as freestyle and Greco-Roman, de-emphasize chokes in favor of pins and takedowns, but incorporate neck control elements that can transition to choke-like holds in variants. Within (MMA), chokeholds account for 76.2% of all submissions and 15.5% of total fight endings in (UFC) history through systematic analysis of over 5,800 bouts. The rear-naked choke emerges as the most frequent, representing 32-50% of UFC submissions overall, leveraging back-mount dominance to isolate the neck without gi grips. Other common chokes include the (approximately 8% of submissions) and (similarly around 8%), often applied from guard positions or during defenses. Submissions broadly end 17-21% of modern MMA bouts, underscoring chokes' role in differentiating grapplers amid striking threats.

Regulations and Safety Protocols

In mixed martial arts (MMA) governed by the Unified Rules of MMA, chokeholds are permitted as legal submission techniques, provided they do not involve prohibited actions such as direct throat strikes or grabbing the trachea. Referees intervene upon verbal taps, physical taps, or signs of unconsciousness, with fights halted to prevent prolonged application; post-submission, combatants receive immediate medical evaluation by ringside physicians. In (BJJ) competitions under (IBJJF) rules, various chokeholds—including rear naked chokes, triangle chokes, and gi-based collar chokes—are explicitly allowed, though neck cranks are restricted to integration within a choke to avoid independent spinal torque. Matches emphasize submission via tap-out, with referees enforcing prompt releases and disqualifying competitors for failure to comply or for illegal modifications like slamming during choke application. Safety protocols across these disciplines prioritize rapid cessation upon submission signals, positioning unconscious athletes in recovery posture (side-lying to maintain airway), and monitoring for revival through chest stimulation or supplemental oxygen if needed. Empirical forensic reviews indicate near-zero mortality directly from chokes in sanctioned MMA events, attributed to these controls and the predominance of blood-restricting over air-restricting variants, which induce reversibly within 5-10 seconds when released promptly. Training emphasizes early tapping to avoid unconsciousness and mitigate risks like ; after unconsciousness, allow full recovery of at least 1-2 minutes until normal alertness returns, limit unconscious finishes per session per person, and rest 1-2 days between intense sessions if fatigued or dizzy; seek medical help for post-choke symptoms such as headache, nausea, or disorientation lasting over a minute. Studies and expert consensus indicate no established evidence of cumulative brain damage from repeated blood chokes in training. Organizations mandate certified instructors and event medical staffing to handle rare complications such as vascular .

Applications in Law Enforcement

Training Standards

In agencies authorizing vascular neck restraints (VNR), training protocols stress application of lateral pressure to the carotid arteries and jugular veins to restrict blood flow to the brain, inducing compliance or temporary unconsciousness without airway compression. Techniques typically involve positioning the forearm against one side of the neck and the bicep against the other, often in rear or lateral holds, integrated with grappling for cuffing. Programs such as the Lateral Vascular Neck Restraint (LVNR) system employ graduated pressure levels—low for initial compliance, medium for escalation, and high to achieve unconsciousness within 4-7 seconds—applicable in standing, kneeling, or ground positions. Training curricula include initial certification and periodic refreshers, with instructor courses lasting 8 hours and requiring prerequisites like basic defensive tactics approval. Multi-agency data from 2010-2020 document 85,918 training applications across 14,083 full-pressure uses by officers and trainees, yielding 76 mild injuries (0.09% rate, 95% CI: 0.07-0.11%) primarily from associated , with no fatalities or significant injuries. Efficacy in training mirrors field outcomes, achieving 92.6% success in gaining compliance (95% CI: 90.7-94.1%). Restrictions in training prohibit VNR against passively resisting subjects and mandate aftercare, including medical monitoring for rare vascular complications like stroke, with recommendations for post-application CT imaging if symptoms arise. At the federal level, U.S. Department of Justice policy classifies carotid restraints as prohibited except when deadly force is justified—i.e., imminent threat of death or serious injury—with annual training reinforcing this limitation and de-escalation alternatives. Despite widespread state and local bans post-2020, authorized programs derive from martial arts principles adapted for law enforcement, emphasizing minimal force and positional safety over 55 years without reported deaths or litigation in LVNR applications.

Operational Effectiveness

Vascular neck restraints (VNR), a controlled blood choke technique targeting carotid arteries to induce temporary , exhibit high operational effectiveness in for subduing actively resistant subjects without resorting to lethal force. A peer-reviewed of 944 field applications across three U.S. agencies from 2010 to 2020 reported a 92.6% success rate in achieving custody of combative individuals, with effects manifesting in 5-14 seconds under proper execution. This efficacy stems from disrupting motor function and resistance, allowing officers to transition to restraints faster than pain-compliance methods like joint locks or strikes, which often fail against drug-influenced or high-adrenaline suspects. In a case study of the Spokane Police Department, VNR was deployed 239 times between 2009 and 2020, succeeding in all instances to de-escalate encounters without escalation to firearms or severe injury, representing 2.4% of use-of-force incidents but preventing higher-force outcomes in 100% of reviewed cases. Compared to alternatives such as conducted energy weapons (CEWs), which yield compliance in 70-85% of deployments but risk cardiac effects or misses, VNR demonstrated lower suspect injury rates (0.95% mild injuries, primarily soreness) and officer assaults during application. A 2021 Washington State review of over 10,000 force incidents further corroborated that neck restraints correlated with reduced overall injuries versus empty-hand controls or impact tools. Tracheal (air) chokes, by contrast, show diminished due to reliance on airway compression, which provokes reflexive resistance and requires sustained 10-20 seconds for incapacitation, increasing struggle and injury risk; empirical data on their isolated use remains limited, with policies often prohibiting them in favor of VNR. Proper —emphasizing anatomical precision and release upon compliance—underpins this effectiveness, as evidenced by zero fatalities in the aggregated 944 field and 85,918 applications reviewed, though improper application can extend risks. Departments reporting routine VNR integration, such as Spokane's, note it as a "force multiplier" for officer safety, reducing assaults by 20-30% in restraint phases relative to non-neck techniques.

Associated Risks

Vascular neck restraints, intended to restrict flow to the via compression of the carotid arteries, carry risks of if applied excessively or prolonged, potentially leading to , seizures, or due to oxygen deprivation. Air chokes, which compress the trachea, pose higher risks of asphyxiation, tracheal damage, and delayed airway , exacerbating injury potential compared to vascular techniques. Neurological complications, including carotid or and embolic strokes, have been documented in case reports following restraint application, though causality often involves confounding factors like subject resistance or pre-existing conditions. Empirical data indicate that fatalities from neck restraints constitute less than 1% of overall police-involved killings , underscoring their rarity relative to other force methods like firearms. Among civilian deaths by police, asphyxiation accounts for only 1-2%, with most attributed to shootings rather than restraints. Studies of trained applications, including over 800 vascular neck restraints in controlled exercises, report no fatalities or significant injuries, suggesting procedural safeguards mitigate risks when execution adheres to standards. However, reviews of 29 restraint-related deaths revealed associations with severe cerebrovascular damage and petechiae indicative of hypoxia, highlighting potential lethality in operational settings where variables like subject intoxication or non-compliance complicate control. Risk elevation stems from improper technique, such as transitioning to airway compression or failing to release upon compliance, as well as subject-specific vulnerabilities including , drug influence (e.g., stimulants increasing blood pressure), or when combined with prone restraint. Training inconsistencies across agencies contribute to variability; while vascular methods reduce overall injuries compared to strikes or takedowns, misuse amplifies harm, prompting medical bodies like the American Academy of Neurology to caution against routine deployment due to unpredictable outcomes. Departments with stricter policies show correlated declines in restraint-involved fatalities, though aggregate use-of-force data emphasize that such incidents remain infrequent amid millions of annual encounters.

Controversies and Debates

High-Profile Incidents

On July 17, 2014, Eric Garner, a 43-year-old man with a history of , , and heart disease, died during an arrest by officers on [Staten Island](/page/Staten Island) for allegedly selling loose, untaxed cigarettes. Officer Daniel Pantaleo applied an arm around Garner's neck in a maneuver classified as a chokehold, which was prohibited by NYPD policy at the time, while other officers restrained him in a ; Garner repeatedly stated "I can't breathe" eleven times before losing consciousness. The medical examiner ruled the death a caused by compression of the neck (chokehold), compression of the chest, and contributory prone positioning, though federal investigations noted Garner's underlying health conditions as factors in his vulnerability to restraint-induced . Pantaleo faced no criminal charges after a state declined and a federal probe found insufficient evidence for prosecution, but he was fired in August 2019 following an administrative review by the NYPD Civilian Complaint Review Board. The incident, captured on video by a bystander, sparked widespread protests and contributed to renewed scrutiny of chokehold use, influencing New York City's 2020 legislation criminalizing the technique. Other documented cases include the December 22, 2012, death of Kerwin Harris in , , where a applied a chokehold during a struggle after Harris resisted arrest on outstanding warrants; Harris, who had and was under the influence of drugs, went into and died, with the ruling it an accident due to the combined effects of restraint, physical exertion, and his health status. No criminal charges were filed against the officer, as the was deemed justified under department guidelines, though the case highlighted inconsistencies in chokehold training and application across jurisdictions. These incidents underscore empirical patterns where chokeholds, intended as compliance tools, have correlated with asphyxial risks in suspects with pre-existing conditions, though causal attribution often involves multifaceted factors beyond the hold itself, as determined by rather than isolated video analysis.

Empirical Evidence on Lethality

Vascular neck restraints (VNRs), which compress the carotid arteries to induce unconsciousness without tracheal occlusion, demonstrate low lethality when applied correctly, as evidenced by extensive use in combat sports. In judo, where choke techniques including rear naked chokes have been standard since 1882, no fatalities have been reported in competition or training. Similarly, in mixed martial arts (MMA), mortality directly attributable to chokes in sanctioned bouts is virtually zero, with rare complications such as arterial dissection occurring primarily from improper technique or pre-existing conditions. A cross-sectional survey of 4,307 practitioners reported ongoing symptoms in only 0.05% of cases following sportive chokes, underscoring their safety profile in controlled environments. In contexts, empirical data similarly indicate rarity of fatal outcomes from VNRs. Analysis of one large department's use-of-force incidents found no injuries resulting from proper VNR application, with restraints employed successfully on non-compliant subjects without escalation to lethal force. Nationally, deaths following neck restraints constitute 1-2% of all police-involved killings, the majority of which involve firearms rather than restraints. A review of 29 cases linked to law enforcement chokeholds identified cerebrovascular injuries, but these represent outlier events amid infrequent overall use, limiting generalizability to trained applications. Physiological studies reinforce VNR safety, showing unconsciousness within 8-14 seconds via without sustained damage upon release, provided no excessive force or prolonged hold occurs. Risks escalate with tracheal compression or underlying vascular pathology, as in air chokes, which are distinct and more hazardous due to potential airway obstruction and higher complication rates. Empirical rarity of fatalities—contrasted with thousands of annual applications in training and operations—supports VNRs as a non-lethal alternative, though improper execution or suspect factors can contribute to adverse outcomes in isolated incidents.

Policy Arguments For and Against Bans

Arguments in Favor of Bans Proponents of banning chokeholds and neck restraints in law enforcement argue that these techniques pose an unacceptable risk of serious injury or death, even when intended as vascular neck restraints (VNRs) that compress carotid arteries rather than airways. Misapplication can lead to airway restriction, positional asphyxia, or unintended lethal outcomes, as evidenced by high-profile cases like the 2014 death of Eric Garner during a New York Police Department restraint. Empirical analyses indicate that jurisdictions adopting neck restraint bans experience reductions in police-involved fatalities without corresponding increases in crime rates, suggesting bans enhance public safety by limiting a high-risk tactic. The Council on Criminal Justice's Task Force on Policing has recommended prohibiting all neck restraints, citing their potential to erode police legitimacy and cause harm disproportionate to benefits, particularly when less lethal alternatives like tasers or de-escalation exist. In 2021, the U.S. Department of Justice implemented a policy restricting federal officers' use of chokeholds to situations where deadly force is authorized, reflecting a view that such restraints should not be routine compliance tools. Arguments Against Bans Opponents contend that properly trained VNRs are a safe, non-lethal option for subduing actively resistant subjects, with success rates exceeding 90% in gaining compliance without firearms or severe injury. A 2022 study of over 1,000 VNR applications by law enforcement found no fatalities or serious injuries directly attributable to the technique when applied per protocols, attributing rare adverse events to factors like suspect drug use or underlying health conditions rather than the restraint itself. Banning these holds could force officers toward more dangerous escalations, such as intermediate weapons or shootings, especially in close-quarters struggles where tasers fail, as noted in analyses of use-of-force dynamics. Data from departments retaining VNRs under strict guidelines show low incidence of harm, with restraints typically deployed against physically non-compliant individuals, supporting their role as a graduated response below . Critics of bans, including police unions, argue that vague prohibitions risk criminalizing officers in dynamic encounters and ignore deficiencies as the root cause of misuse, rather than the technique. Historical evidence from pre-2020 bans suggests enforcement challenges render them ineffective without addressing broader use-of-force policies.

United States Policies

In the , there is no nationwide federal prohibition on chokeholds for state and law enforcement agencies, leaving regulation primarily to individual departments, municipalities, and states. Federal policies apply only to agencies under the Department of Justice (DOJ) and other national entities, where chokeholds and carotid restraints were explicitly prohibited in September 2021 unless their use is justified as to protect life. This policy stemmed from an by President Biden in May 2021, which directed federal agencies to ban such techniques except in scenarios and encouraged state and departments receiving federal grants to adopt similar restrictions. However, following the 2024 election, President Trump reversed aspects of this directive in January 2025, loosening federal use-of-force guidelines that had mandated chokehold bans for grant recipients, though core DOJ prohibitions for federal officers remained intact. At the state and local levels, policies have varied historically but saw a sharp increase in restrictions after high-profile incidents like the 2014 death of Eric Garner in , where a chokehold was implicated. Between May 2020 and May 2021, 24 states enacted laws restricting or banning neck restraints, including chokeholds, often classifying them as options only. By mid-2025, surveys of police departments indicated that 92% prohibited chokeholds outright, up from 22% in 2015-2016, reflecting widespread policy shifts driven by legislative and departmental reforms post-George Floyd's 2020 death. Examples include New York's 2021 expansion of its post-Garner ban to criminalize chokeholds as a unless is warranted, and California's 2021 law banning carotid holds except in life-threatening situations. Despite these trends, implementation has been inconsistent, with some departments distinguishing between "chokeholds" (compressing the airway) and "vascular neck restraints" (restricting blood flow), and earlier bans like the Police Department's 1982 prohibition on bar-arm holds proving unevenly enforced. Federal legislative efforts to impose broader standards, such as the End Police Use of Chokeholds Act of 2021 and the Justice in Policing Act, aimed to withhold funding from non-compliant state and local agencies but stalled in , leaving no mandatory national framework. Policies often require attempts prior to any neck restraint and mandate reporting, but variances persist: some jurisdictions allow them under strict protocols, while others treat them as per se prohibited to mitigate risks of or vascular compromise. This patchwork approach reflects ongoing debates over technique safety, with empirical data from controlled studies indicating vascular restraints can be effective and low-risk when properly applied, yet public and political pressures have favored categorical bans in most major departments.

International Practices

In , police use of chokeholds and neck restraints is generally prohibited, with many countries imposing long-standing bans on such techniques to minimize risks of injury or death during arrests. For instance, guidelines in nations including , the , and restrict or forbid vascular or airway neck compressions, reflecting a broader emphasis on over physical dominance in crowd control and suspect apprehension. In the , practices vary by force, but neck restraints are often discouraged or explicitly avoided in training to prevent unintended harm, as evidenced by London's guidance warning that "any form of pressure to the neck area can be dangerous." , for example, does not train officers in any neck-involving restraints, including chokeholds, aligning with national standards that prioritize arm locks and positional control instead. Canada has regulated chokeholds provincially, with prohibiting their use by police since 1994 under amendments to the Police Services Act, prompted by in-custody death inquiries that highlighted risks of . Nationally, a 2007 study reviewed vascular neck restraints as a compliance tool for resistant subjects but noted ongoing debates over training efficacy and safety, leading many agencies to limit or phase them out in favor of less lethal options. Australia's approach has seen recent flux, as in where a 2023 ban on "sleeper" chokeholds—intended to align with other states' restrictions—was reversed within weeks amid concerns over officer safety and reduced tactical options against combative individuals. Other states like permit controlled neck restraints under strict guidelines, but empirical reviews post-incident often critique their application due to inconsistent training outcomes. In military contexts worldwide, the remains a core technique in close-quarters combatives programs, valued for its rapid incapacitation via vascular compression without permanent damage when properly executed. Norwegian forces, for example, incorporate it in exercises, as observed during 2017 operations in , emphasizing proficiency for non-lethal subdual in asymmetric conflicts. Similar integration appears in NATO-allied programs, where it contrasts with civilian policing bans by prioritizing combat effectiveness over restraint minimalism.

Outcomes of Recent Bans

Following the death of George Floyd on May 25, 2020, numerous U.S. jurisdictions enacted or strengthened bans on police chokeholds and neck restraints, including (June 2020), New York State (June 2020 felony prohibition in cases of injury or death), and over 20 other cities and states by 2021. A 2024 study analyzing over 2,000 police departments found that agencies adopting neck-restraint bans experienced approximately 5-10% lower rates of police-involved killings compared to non-banning agencies, controlling for factors like crime rates and department size. These bans correlated with collateral benefits, including 3-7% reductions in overall rates and higher case clearance rates (up to 15% in some metrics) in banning departments, potentially due to sustained policing activity without heightened among officers. Assaults on officers also declined by 4-6% post-ban, suggesting no compensatory increase in officer injuries from alternative tactics. No significant uptick in firearm discharges or other lethal force incidents was observed in the analyzed data, challenging concerns that bans would shift risks toward deadlier methods. However, empirical evidence remains limited by short post-ban observation periods (typically 1-3 years) and enforcement variability; a review of pre-2020 bans in major departments like and New York found inconsistent compliance, with neck restraints still used hundreds of times annually despite prohibitions, yielding negligible reductions in fatalities. Neck restraints account for fewer than 1% of police killings overall, limiting the absolute impact of bans on total use-of-force deaths. Ongoing monitoring, such as through the FBI's National Use-of-Force Data Collection (launched 2019 but with voluntary reporting), is needed to assess long-term efficacy.

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