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Boosting (doping)
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A game of wheelchair rugby, a sport where some competitors are believed to "Boost"

Boosting is a method of inducing autonomic dysreflexia with the intention of enhancing performance in sport. It can be used by an athlete with a spinal cord injury to increase their blood pressure and is performed by causing a painful stimulus in the lower part of the body. The International Paralympic Committee (IPC) banned the practice in 1994, but many competitors with spinal injuries are still thought to be using it as a performance enhancer.

Method

[edit]

Athletes with spinal injuries can have difficulties with autonomic functions and their bodies may be unable to control blood pressure and heart rate. Because of this their bodies do not adapt to the increased demand of physical activity. Without these changes the athlete can become fatigued and suffer from a lower level of endurance. Boosting works by tricking the body into a state of high blood pressure and heart rate,[1] with an increased utilization of oxygen improving the athlete's performance.[2]

Athletes who perform boosting before or during an event will often self-harm with some taking extreme measures to achieve the desired boost level. Techniques include:[3][4]

  • Clamping the catheter to ensure that the bladder becomes overly full
  • Overly tightening leg straps
  • Electric shocks or stress to the feet, legs, scrotum, or testicles
  • Breaking a bone, usually in the toe.

Effectiveness and risks

[edit]
Boosting simulations were conducted on wheelchair marathon athletes in 1994 and showed that significant performance gains could be made

Boosting has been shown in simulated races to give noticeable improvements in the performance of wheelchair marathon athletes.[2][5] In the 1994 study the athletes attained an average 9.7 percent improvement after their bladder had been over-distended or after sitting in the racing chair for 1–2 hours prior to competing.[5] It is believed to be capable of enhancing performance by up to 15 percent.[4]

There are many possible side effects of boosting, including the occurrence of a cerebrovascular or cardiovascular event such as a stroke or heart attack.[2][3] Other complications include:[5]

Prevalence

[edit]

The IPC conducted a survey during the 2008 Games with 99 responses.[1][3] 16.7 percent of the participants indicated that they had tried boosting in training or during a competition, with more than half of them being competitors in wheelchair rugby.[1] The use of boosting continues in athletes but is very difficult to detect.[3][4] During the Games 20 athletes were tested just before their event for evidence of boosting but there were no positive results.[1]

IPC view

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The IPC made boosting illegal in 1994.[3] Their handbook states in Chapter 4.3:

An athlete with a systolic blood pressure of 180mm Hg or above will be re-examined approximately ten minutes after the first examination. If on the second examination the systolic blood pressure remains above 180mm Hg the person in charge of the examination shall inform the Technical Delegate to withdraw the athlete from the particular competition in question. Any deliberate attempt to induce Autonomic Dysreflexia is forbidden and will be reported to the Technical Delegate. The athlete will be disqualified from the particular competition regardless of the systolic blood pressure.[6]

See also

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References

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Further reading

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Revisions and contributorsEdit on WikipediaRead on Wikipedia

Boosting (doping)

View on Grokipedia
from Grokipedia
Boosting is a form of non-pharmacological doping practiced by athletes with high-level injuries, in which —a potentially life-threatening condition—is intentionally induced to enhance physical performance by elevating and improving oxygen delivery to muscles. This method targets para-athletes, particularly those with cervical or thoracic injuries at or above the T6 dermatome, who experience impaired function leading to reduced cardiovascular responses during exercise. To trigger , athletes apply noxious stimuli below the level of their injury, such as tightening straps around the legs, blocking urinary catheters to overdistend the , applying electric shocks, or even self-inflicting minor trauma like pinching the skin or sitting on sharp objects. These actions provoke a massive discharge, causing widespread , a surge in systolic (often exceeding 160–180 mmHg), and compensatory . The resulting temporarily boosts , oxygen delivery to muscles, and in events such as or rugby. Despite its performance benefits, boosting poses severe health risks, including acute symptoms like severe headaches, nasal congestion, sweating, anxiety, and flushing, as well as life-threatening complications such as seizures, , , cerebral hemorrhage, , and sudden death. Studies indicate that while autonomic dysreflexia occurs involuntarily in up to 70–90% of athletes with eligible spinal injuries during daily life, intentional boosting for has been reported by approximately 16.7% of surveyed Paralympic competitors in disciplines requiring sustained effort. Boosting has been recognized and prohibited in para-sports since the mid-1990s, with the (IPC) formally banning it in 1994 after evidence emerged of its use, classifying it as an unfair and dangerous manipulation of the rather than a prohibited substance under the (WADA) code. Detection relies on monitoring elevated systolic (≥160 mmHg as of 2016) during competition, alongside athlete education and ethical guidelines, though challenges persist due to its self-induced nature and the absence of positive cases in over 78 tests at major Paralympic events; despite extensive testing, no confirmed cases of boosting have been detected to date (as of 2025). The practice raises profound ethical concerns in disability , blurring lines between medical management of a disability and intentional performance enhancement, and underscores the need for ongoing awareness to protect athlete health.

Overview and Mechanism

Definition

Boosting is a form of doping unique to athletes with injuries, defined as the intentional induction of (AD)—a potentially life-threatening medical condition characterized by sudden spikes in —to temporarily elevate cardiovascular function and enhance athletic performance. This method exploits the physiological response of AD, which occurs in individuals with lesions at or above the T6 spinal level, to increase , thereby enhancing oxygen delivery to muscles during endurance events, potentially improving race times by up to 9.7% as reported in a 2013 study. The technique primarily targets Paralympic athletes in wheelchair sports, such as racers classified under T51-T54, who have high-level injuries that impair normal autonomic regulation and lead to chronic low and fatigue during exertion. These classifications encompass athletes with or high , where the disruption in neural pathways below the injury site can trigger AD episodes that athletes deliberately provoke to counteract performance limitations. Unlike traditional blood doping methods, which involve the exogenous manipulation of blood components through substances like or autologous transfusions to boost oxygen-carrying capacity, boosting relies solely on the endogenous exploitation of a pre-existing medical condition without the use of prohibited drugs or invasive procedures. In the context of , boosting has emerged as a perceived "natural" performance enhancer, prompting the to classify it as a banned practice under anti-doping rules due to its health risks and unfair advantage.

Physiological Process

Autonomic dysreflexia (AD) is a potentially life-threatening that occurs in individuals with injuries (SCI) at or above the T6 level, resulting from the disruption of descending inhibitory pathways in the . Noxious stimuli below the level of injury, such as distension or irritation, trigger an exaggerated , leading to unopposed sympathetic outflow and massive release of norepinephrine, which causes widespread distal to the lesion. This reflex is normally modulated by higher brain centers, but in SCI patients, the loss of supraspinal control amplifies the response, producing a sudden onset of . In the context of boosting, athletes with qualifying SCIs intentionally induce through self-inflicted noxious stimuli to exploit this for acute physiological changes. Common methods include applying tight leg straps or clothing to create pressure, blocking urinary catheters to cause overfilling and distension, or inflicting minor trauma such as scratching, pinching, or even fracturing small bones like toes below the injury level to activate nociceptors. These techniques target visceral or somatic afferents that bypass the disrupted pathways, initiating the AD cascade without requiring pharmacological agents. The primary physiological effect of induced AD is a rapid and marked elevation in systolic , often rising 20–40 mmHg above baseline and potentially exceeding 180 mmHg in severe episodes due to intense and peripheral . This is accompanied by from baroreceptor-mediated vagal activation, as well as increased flow to working muscles above and sometimes below the through shunting mechanisms that enhance and oxygen delivery during exertion, particularly in upper-body dominant activities like propulsion. Facial flushing and sweating may occur above the injury level due to compensatory parasympathetic responses. The effects of an episode in boosting are typically acute and self-limited, lasting from several minutes to up to 30 minutes after the stimulus is removed or managed, allowing athletes to time induction shortly before race starts for peak impact during short-duration events. Control of the response involves prompt removal of the triggering stimulus, such as unclogging a or loosening restraints, which can rapidly normalize if addressed early.

Historical Development

Origins in Sports

Boosting, the intentional induction of autonomic dysreflexia (AD) to enhance athletic performance, first emerged in the late 1980s and early 1990s among athletes with high-level spinal cord injuries competing in wheelchair racing events at the Paralympic Games. This practice gained traction amid increasing competitiveness in the T52-T54 classification classes, which include athletes with tetraplegia or significant upper-body impairments, where spontaneous episodes of AD had been observed to provide temporary cardiovascular advantages during races. Early anecdotal reports suggested that athletes began experimenting with self-induction techniques, such as bladder distension or applying tight straps, to replicate these effects intentionally before competitions. Medical awareness of boosting as a potential enhancer crystallized in literature around 1994, with initial documentation highlighting its unintended benefits for tetraplegic athletes. A seminal by Harris described self-induced as a method some athletes used to elevate and improve propulsion efficiency in , recommending its due to associated risks. Concurrent , including a 1992 study at the Centre, quantified these effects, demonstrating approximately a 9.7% in 7.5 km time-trial when AD was intentionally triggered. This period marked the transition from incidental occurrences of AD to deliberate manipulation for competitive edge. The adoption of boosting was influenced by cultural factors within communities, where routine management of AD symptoms—such as through catheterization or pressure relief—was already integrated into daily life. Athletes from these backgrounds, familiar with AD triggers, naturally extended these practices to sports settings, viewing them as an accessible means to overcome physiological limitations in adaptive athletics. Surveys later indicated widespread informal knowledge-sharing among peers, with techniques becoming normalized in training circles by the mid-1990s. Discussions within the (IPC) in the mid-1990s, prompted by emerging evidence, led to the initial ban on boosting in 1994. Further investigations in the early , spurred by coach reports of suspicious pre-race behaviors such as athletes self-inflicting discomfort to induce AD, contributed to the implementation of random monitoring at the 2000 Sydney Paralympic Games, targeting suspected cases in events. This marked a shift toward systematic oversight to address the practice's prevalence and dangers.

Key Incidents and Cases

One of the earliest major efforts to address boosting occurred during the 2008 Beijing Paralympic Games, where the (IPC) tested 20 athletes with high injuries—16 wheelchair racers and four hand cyclists—for signs of intentional shortly before their competitions. These tests involved monitoring and to detect artificially elevated levels suggestive of boosting. A related athlete survey conducted at the Games found that 16.7% of competitors with cervical or high thoracic injuries admitted to intentionally inducing for performance enhancement. In the lead-up to the 2012 Paralympic Games, the IPC issued public warnings about the dangers and illegality of boosting, emphasizing its classification as a prohibited method under anti-doping rules. Enhanced monitoring protocols were implemented, including pre-race screenings to identify potential cases. While no disqualifications specifically for boosting were publicly confirmed, the focus on physiological checks in high-risk sports like and highlighted ongoing suspicions and the need for vigilant oversight. The 2016 Rio Paralympic Games saw multiple suspicions of boosting, prompting the IPC to introduce further enhanced monitoring measures, such as increased frequency of assessments and targeted testing for athletes with injuries in disciplines like . These efforts reflected heightened awareness following prior surveys indicating prevalence rates of up to 13-17% among elite injured athletes. For the 2020 Tokyo Paralympic Games (held in 2021 due to the ), the IPC established dedicated protocols to combat boosting, including education sessions for athletes and officials, as well as integrated physiological monitoring within the overall anti-doping program that conducted over 1,500 tests. Athlete testimonies from anonymous surveys and studies have provided insights into its use, with some competitors confessing in controlled settings to employing techniques like bladder overfilling or tight clothing to induce , citing perceived performance benefits despite health risks. These accounts, often shared in post-competition reviews or WADA-funded , underscore the challenge of self-induced methods. At the 2024 Paris Paralympic Games, the IPC continued its anti-doping program with specific measures to monitor for boosting, including checks for at-risk athletes. No confirmed cases of boosting were publicly reported, aligning with ongoing efforts to educate and deter the practice through heightened awareness and testing protocols. Consequences for confirmed boosting violations are severe under the IPC Anti-Doping Code, which classifies intentional induction of as physiological manipulation. Athletes face immediate disqualification from the event, forfeiture of medals, points, and prizes, along with ineligibility periods typically ranging from two years for unintentional cases to four years for deliberate violations. Such sanctions have ripple effects, including alterations to overall medal standings and impacts on team qualifications for future competitions.

Performance and Health Impacts

Effectiveness for Athletes

Boosting, the intentional induction of (AD), has been shown to provide quantifiable performance enhancements for certain Paralympic athletes with high-level injuries, primarily through elevations in that improve muscle perfusion and power output. Studies indicate improvements of approximately 5-10% in key metrics, such as race times and propulsion velocity during events. For instance, intentional AD induction led to an average 9.7% faster completion time in a 7.5 km race simulation, alongside increased peak power output during ergometry testing. This boost is attributed to facilitating greater upper-body strength and endurance, as higher systolic correlates with enhanced force generation in arm-driven . Scientific evidence from controlled research underscores these gains, particularly in wheelchair propulsion dynamics. In a seminal investigation involving elite quadriplegic athletes, AD provocation resulted in significant velocity increases during submaximal and maximal ergometer trials, with speeds rising by up to 10% under boosted conditions compared to baseline. This effect stems from improved oxygen delivery to working muscles above the injury level, bypassing typical cardiovascular limitations in athletes, such as blunted responses. Athlete surveys further support efficacy, with 57% reporting benefits for sprint events and 79% for middle-distance races, where enhanced circulation reduces perceived exertion and sustains higher workloads without external pharmacological aids. These advantages are most pronounced in short-distance events like the 100m or 400m sprints, where rapid power bursts benefit from the acute hypertensive response, enabling quicker and top speeds without relying on lower-body function. However, results remain inconsistent due to the inherent unpredictability of AD onset and intensity, which varies by individual level, stimulus method (e.g., distension), and environmental factors, leading to variable performance outcomes across trials. Moreover, boosting appears less effective for prolonged events, such as marathons beyond 10 km, where sustained AD is difficult to maintain without risking overexertion or physiological instability.

Associated Risks and Side Effects

Boosting, the intentional induction of (AD) in athletes with injuries, poses severe acute risks primarily due to extreme , which can exceed systolic levels of 160 mm Hg or higher. These risks include , seizures, , , , and cerebral hemorrhage, all of which have been documented in clinical reviews of AD episodes. For instance, a review of 32 life-threatening AD cases reported 23 complications such as and , alongside 7 cardiovascular events and 2 pulmonary issues, with 7 fatalities occurring, underscoring the potential for sudden hospitalization or death following boosting attempts. Repeated episodes of from chronic boosting can lead to long-term vascular damage through endothelial shear injury and accelerated , increasing the likelihood of in patients. Additionally, sustained from these episodes contributes to kidney strain and renal insufficiency, while neurological complications may arise from cumulative and vascular stress. These chronic effects are particularly concerning as they manifest years after exposure, exacerbating overall health decline in affected individuals. Medical organizations universally regard boosting as a life-threatening practice, with the issuing explicit warnings and bans due to its health hazards, emphasizing the unpredictable and dangerous nature of induced AD. Similarly, the American Spinal Injury Association highlights AD's potential for fatal outcomes in guidelines for spinal cord injury , advising strict monitoring and intervention to prevent such episodes. Athletes with incomplete lesions face heightened vulnerability to boosting risks, as their partial neural preservation can lead to more erratic autonomic responses and less predictable spikes. Those with comorbidities, such as pre-existing cardiovascular conditions, are at even greater peril, amplifying the likelihood of severe complications during or after AD induction.

Usage and Detection

Prevalence Across Disciplines

Boosting, the intentional induction of to enhance performance, has been primarily documented in wheelchair athletics, particularly track events within the T51-T54 classification groups for athletes with high-level injuries. Surveys conducted around the 2008 Paralympic Games of 99 elite Paralympic athletes with injuries revealed an overall usage estimate of approximately 16.7%, with 10 out of 60 respondents admitting to intentional induction during training or competition. These figures highlight boosting as a targeted practice in endurance-based track disciplines, where the physiological effects of elevated and provide a competitive edge in propulsion and speed, though higher rates were also reported in (55.5% of admitted boosters). The practice has shown limited spread to other Paralympic disciplines. In , surveys of high-level spinal cord injured athletes reported zero instances of boosting usage, attributed to the sport's intermittent high-intensity demands that may not align as closely with the method's benefits. Similarly, no prevalence data exists for wheelchair swimming, indicating rarity in aquatic events. Isolated reports and testing have occurred in hand cycling, a subset of , where four athletes were screened during the 2008 Games, though no confirmed cases emerged from those efforts. Quantitative data on boosting remains limited post-2008, with no new surveys or confirmed cases reported as of 2025, despite expanded educational initiatives by the . Demographically, boosting has predominantly involved male athletes aged 28-39 years with or high thoracic spinal cord injuries at or above T6, reflecting the physiological prerequisites for . In surveyed cohorts, males comprised 88% of respondents, with the practice concentrated among this group in elite competitive settings.

Challenges in Identification

Detecting boosting, the intentional induction of (AD) in athletes with injuries at or above T6, presents significant challenges due to the absence of a specific , unlike chemical doping methods that leave detectable residues in or . Current detection primarily relies on pre-race monitoring using automated sphygmomanometers, where a systolic of 180 mmHg or higher is considered indicative of a hazardous dysreflexic state, with or without accompanying symptoms such as flushing or . Officials also employ video analysis to observe suspicious behaviors, including self-catheterization or application of tight ligatures to induce distension or , which can trigger AD. Post-race checks for AD symptoms, such as excessive sweating or , further aid identification, though these are subjective and often conducted alongside athlete interviews. A key limitation is that AD symptoms closely mimic natural physiological responses to competition stress, such as elevated from adrenaline surges, making it difficult to differentiate spontaneous episodes from intentional boosting without invasive procedures like direct examination, which raise ethical concerns for and among disabled athletes. Unlike pharmacological doping, boosting involves no exogenous substances, complicating verification of and leading to high rates of false negatives; for instance, the 180 mmHg threshold may overlook milder AD inductions, as evidenced by no positive tests in 78 monitored cases across from 2008 to , despite known prevalence. False positives are minimized by the threshold but can occur in athletes with naturally high baseline pressures, further blurring lines between accidental and deliberate AD. These challenges persist as of , with no reported positive detections and ongoing reliance on monitoring and , though proposals for individualized "blood pressure passports" tracking baselines have yet to be standardized in Paralympic protocols.

Regulatory Framework

IPC Policies and Bans

The (IPC) classifies boosting as a prohibited performance-enhancing method, involving the intentional induction of (AD) in athletes with injuries at or above the T6 level, which is treated as a form of medical condition manipulation akin to doping without substances. This prohibition, initially recognized in 1994, was formalized with testing protocols in the IPC Handbook in 2004, building on earlier recognitions of its risks, and is enforced through a specific position statement that deems competing in a hazardous dysreflexic state—defined by systolic exceeding 160 mmHg—a violation, as outlined in the April 2024 Position Statement. Enforcement measures include mandatory pre-competition blood pressure checks for at-risk athletes at major events such as the and World Championships, initiated in 2004 to detect elevated indicative of boosting. These checks were strengthened in 2016 by lowering the systolic threshold from 180 mmHg to 160 mmHg, requiring athletes with known elevated baselines to submit medical evidence at least 14 days prior, and mandating immediate exclusion from competition on health grounds if thresholds are exceeded, followed by investigations for intentional boosting. Penalties for violations encompass disqualification from the event, potential competition bans, and reviews of the athlete's classification status to ensure fair play. Additionally, the IPC requires anti-doping education programs for athletes, coaches, and support staff, coordinated with National Anti-Doping Organizations, which incorporate awareness of boosting and AD management to prevent its use. The IPC's policies have evolved through revisions to its Anti-Doping Code, which aligns with the (WADA) framework, including updates in and to incorporate unified international standards while maintaining boosting-specific guidelines in the handbook's position statement. This collaboration with WADA ensures consistent prohibited methods and testing protocols, with the IPC reporting compliance annually and leveraging WADA's resources for education and monitoring. Boosting in raises profound ethical dilemmas, particularly the tension between athletes' autonomy in managing their disabilities and the imperative for fair competition among participants with varying impairments. Proponents of greater athlete autonomy argue that practices like inducing (AD) could be viewed as adaptive strategies to overcome physiological limitations inherent to injuries, allowing disabled athletes to compete on more equal terms without relying on prohibited substances. However, critics contend that boosting constitutes intentional for performance enhancement, undermining the core Paralympic value of by introducing unfair advantages—such as up to a 9.7% improvement in athletic output—while endangering lives through risks like and cerebral hemorrhage. This debate echoes broader philosophical concerns in disability sports, where fairness requires balancing individual agency with collective equity, as articulated in frameworks emphasizing "fair equality of opportunity" to prevent any method from distorting the spirit of competition. Legally, boosting falls under the International Paralympic Committee's (IPC) anti-doping framework as a prohibited method, with deliberate induction of AD treated as an offense leading to disqualification, bans, and investigation by the IPC's Legal and Ethics Committee. Unlike traditional doping, which often involves substances regulated by national laws, boosting's classification as self-induced harm has prompted discussions on potential criminal liability in jurisdictions with strict self-harm statutes, though no high-profile prosecutions of Paralympic athletes have been documented to date. Internationally, the (WADA) endorses the IPC's bans on boosting through collaborative anti-doping programs, providing technical support for education and monitoring despite boosting not appearing on WADA's Prohibited List, which primarily targets pharmacological methods. This alignment reflects WADA's harmonized , which encourages signatory organizations like the IPC to address sport-specific integrity threats, contrasting with non-Paralympic adaptive sports—such as outside official events—where rules may lack equivalent prohibitions, potentially allowing unchecked practices. In regions without IPC oversight, such as recreational athletics, the absence of uniform standards exacerbates ethical inconsistencies, as highlighted in global surveys showing varied awareness and acceptance of boosting risks. Looking ahead, sports ethics discussions in 2024 have increasingly called for inclusive anti-doping policies that accommodate disabled ' medical needs while strengthening safeguards against boosting, emphasizing education to foster clean sport cultures. Forums and studies underscore the need for revised systems to reduce incentives for manipulation, integrating input to balance accessibility with fairness, as evidenced by Swedish Para ' calls for more transparent anti-doping practices. These efforts aim to evolve beyond punitive measures toward preventive strategies, ensuring sports promote without compromising or equity.

References

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