Doping — Banned Substances Overview
Overview
Doping refers to the use of prohibited substances or methods to enhance athletic performance. It violates the spirit of sport, endangers athlete health, and creates unfair competition. The World Anti-Doping Agency (WADA) coordinates global efforts to prevent doping, maintain a prohibited list, and establish testing protocols. Understanding the major categories of banned substances, their mechanisms, their detection, and their serious health consequences is essential for athletes, coaches, and sports medicine professionals.
Definition of Doping
WADA Definition
Doping is defined as the occurrence of one or more anti-doping rule violations (ADRVs):
Presence of a prohibited substance in an athlete's sample
Use or attempted use of a prohibited substance or method
Refusing or evading sample collection
Whereabouts failures (missing tests/filing failures)
Tampering with doping control
Possession of prohibited substances or methods
Trafficking or attempted trafficking
Administration to athletes
Complicity in anti-doping rule violations
Prohibited association with sanctioned support personnel
Discouraging or retaliating against reporting
Spirit of Sport
WADA's Code outlines values that doping violates:
Ethics, fair play, and honesty
Health
Excellence in performance
Character and education
Fun and joy
Teamwork
Dedication and commitment
Respect for rules and laws
Respect for self and other participants
Courage
Community and solidarity
World Anti-Doping Agency (WADA)
Background
Founded: 1999 (following widespread doping scandals)
Location: Montreal, Canada (headquarters)
Purpose: Coordinate international anti-doping efforts
Funding: 50% from Olympic Movement, 50% from governments
Governance: Foundation Board with equal representation
Key WADA Functions
Function | Description |
|---|---|
World Anti-Doping Code | Harmonizes anti-doping rules globally |
Prohibited List | Annual list of banned substances/methods |
International Standards | Testing, laboratories, TUEs, results management |
Research | Fund anti-doping research |
Education | Athlete and support personnel education |
Monitoring | Compliance monitoring of signatories |
Investigations | Intelligence and investigations unit |
The World Anti-Doping Code
The Code is the core document harmonizing anti-doping policies worldwide:
First adopted: 2003
Current version: 2021 Code
Accepted by: Olympic Movement, international federations, national anti-doping organizations
Signatories must comply or face sanctions
The Prohibited List
Updated annually (effective January 1 each year), the Prohibited List includes:
Categories of Prohibited Substances
Category | Examples | Prohibition |
|---|---|---|
S0 | Non-approved substances | At all times |
S1 | Anabolic agents (steroids, SARMs) | At all times |
S2 | Peptide hormones, growth factors (EPO, hGH) | At all times |
S3 | Beta-2 agonists (salbutamol, formoterol) | At all times* |
S4 | Hormone and metabolic modulators | At all times |
S5 | Diuretics and masking agents | At all times |
S6 | Stimulants | In-competition |
S7 | Narcotics | In-competition |
S8 | Cannabinoids | In-competition |
S9 | Glucocorticoids | In-competition |
P1 | Beta-blockers | Specific sports only |
*Some therapeutic exceptions exist
Prohibited Methods
Category | Method |
|---|---|
M1 | Manipulation of blood and blood components |
M2 | Chemical and physical manipulation |
M3 | Gene and cell doping |
Therapeutic Use Exemptions (TUEs)
Athletes with legitimate medical conditions may apply for TUEs:
Requirements:
Athlete would experience significant health impairment without treatment
Therapeutic use would produce no additional enhancement
No reasonable therapeutic alternative exists
Necessity is not a consequence of prior prohibited substance use
Process:
Application to relevant anti-doping organization
Medical documentation required
TUE Committee reviews
Approval or denial issued
Can be appealed
Major Categories of Banned Substances
1. Anabolic Androgenic Steroids (AAS)
What are Anabolic Steroids?
Synthetic derivatives of testosterone that promote muscle growth (anabolic effects) and masculinization (androgenic effects).
Examples
Type | Examples |
|---|---|
Exogenous (synthetic) | Nandrolone, stanozolol, trenbolone, oxandrolone, methandienone |
Endogenous (naturally occurring, but supplemented) | Testosterone, DHEA, androstenedione |
Designer steroids | THG ("The Clear"), BALCO-era compounds |
SARMs | Ostarine, ligandrol (selective androgen receptor modulators) |
Prohormones | Precursors that convert to active steroids |
Mechanism of Action
Bind to androgen receptors in muscle cells
Receptor-hormone complex enters nucleus
Gene transcription activated for muscle proteins
Increased protein synthesis (anabolism)
Reduced protein breakdown (anti-catabolism)
Net result: Increased muscle mass and strength
Additional effects:
Increased red blood cell production
Enhanced recovery
Increased aggression and training intensity
Reduced body fat (in some cases)
Performance Effects
Effect | Magnitude |
|---|---|
Muscle mass increase | 5-20% (with training) |
Strength increase | 5-20% |
Recovery enhancement | Significant |
Training capacity | Increased |
Power output | Increased |
Health Risks
Cardiovascular
Risk | Mechanism |
|---|---|
Cardiomyopathy | Direct cardiac muscle effects |
Sudden cardiac death | Arrhythmias, structural changes |
Atherosclerosis | Unfavorable lipid profile (↓ HDL, ↑ LDL) |
Hypertension | Fluid retention, vascular effects |
Left ventricular hypertrophy | Increased cardiac workload |
Blood clots | Increased coagulation factors |
Hepatic (Liver)
Risk | Notes |
|---|---|
Liver damage | Especially with oral steroids (17α-alkylated) |
Peliosis hepatis | Blood-filled cysts in liver |
Hepatocellular carcinoma | Liver cancer |
Cholestatic jaundice | Bile flow obstruction |
Endocrine
Effect | Males | Females |
|---|---|---|
Testosterone production | ↓ Suppressed (testicular atrophy) | N/A |
Fertility | ↓ Sperm count, infertility | Menstrual irregularities |
Gynecomastia | Breast tissue growth (males) | N/A |
Virilization | N/A | Deepened voice, facial hair, clitoral enlargement |
Acne | Severe, body-wide | Severe, body-wide |
Psychological
Effect | Description |
|---|---|
"Roid rage" | Aggression, irritability |
Mood swings | Unpredictable emotions |
Depression | Especially during/after withdrawal |
Dependence | Psychological and physical |
Mania | Elevated mood, risk-taking |
Psychosis | In severe cases |
Other
Risk | Description |
|---|---|
Tendon rupture | Muscle strength outpaces tendon adaptation |
Premature closure of growth plates | Stunted growth in adolescents |
Hair loss | Male pattern baldness (accelerated) |
Infections | If injecting with non-sterile equipment |
Detection
Method | Window |
|---|---|
Urine testing | Days to months (depending on compound) |
Blood testing | Shorter window than urine |
IRMS (Isotope Ratio Mass Spectrometry) | Distinguishes synthetic from natural testosterone |
Athlete Biological Passport | Detects abnormal steroid profiles over time |
2. Erythropoietin (EPO) and Blood Doping
What is EPO?
Erythropoietin is a hormone produced primarily by the kidneys that stimulates red blood cell production in bone marrow. Synthetic EPO (epoetin) is used medically for anemia treatment.
Types of Blood Doping
Method | Description |
|---|---|
EPO (epoetin) | Synthetic EPO injection |
Darbepoetin | Long-acting EPO analog |
CERA | Continuous EPO receptor activator |
Autologous transfusion | Reinfusion of athlete's own stored blood |
Homologous transfusion | Transfusion of compatible donor blood |
Blood substitutes | Oxygen-carrying compounds (HBOCs) |
Hypoxia-inducible factor (HIF) stabilizers | Oral agents that stimulate EPO |
Mechanism of Action
EPO stimulates bone marrow to produce more red blood cells
Hemoglobin concentration increases (carries oxygen)
Hematocrit rises (percentage of blood that is red cells)
Oxygen-carrying capacity increases
More oxygen delivered to muscles
Enhanced aerobic performance
Result: Increased VO₂max and endurance performance
Performance Effects
Effect | Magnitude |
|---|---|
VO₂max increase | 3-7% |
Time trial performance | 2-6% |
Time to exhaustion | Significantly increased |
Hemoglobin/hematocrit | ↑ 10-20% above normal |
Health Risks
Cardiovascular
Risk | Mechanism |
|---|---|
Increased blood viscosity | Too many red cells thicken blood |
Thrombosis | Blood clots (DVT, pulmonary embolism) |
Stroke | Cerebral blood clots |
Heart attack | Coronary thrombosis |
Sudden death | Multiple cyclists died in 1980s-90s |
Hypertension | Increased blood viscosity |
Other Risks
Risk | Notes |
|---|---|
Autoimmune reaction | Body attacks own EPO production |
Infection | From transfusions or injections |
Blood type incompatibility | With homologous transfusion |
Transmission of diseases | HIV, hepatitis (if blood mishandled) |
Iron overload | From repeated transfusions |
Historical Context
1990s cycling deaths: Multiple professional cyclists died in sleep (suspected EPO-related cardiac events)
1998 Tour de France (Festina affair): Major doping scandal
Lance Armstrong/USADA: Systematic EPO use revealed
Russian doping program: State-sponsored blood doping
Detection
Method | Description |
|---|---|
Direct test (urine) | Detects synthetic EPO (different glycosylation pattern) |
Indirect test (blood) | Athlete Biological Passport tracks hemoglobin, reticulocytes |
Flow cytometry | Detects transfused blood cells |
Hematocrit testing | UCI introduced 50% limit in 1997 |
3. Stimulants
What are Stimulants?
Substances that increase activity of the central nervous system, producing increased alertness, attention, energy, and physiological arousal.
Examples
Category | Examples |
|---|---|
Amphetamines | Amphetamine, methamphetamine, dextroamphetamine |
Cocaine | Cocaine hydrochloride |
Ephedrine | Ephedrine, pseudoephedrine (thresholds apply) |
Methylphenidate | Ritalin (ADHD medication) |
Modafinil | Provigil (wakefulness agent) |
Other | Strychnine, various designer stimulants |
Note: Caffeine is NOT prohibited (monitoring program only)
Mechanism of Action
Mechanism | Effect |
|---|---|
↑ Catecholamine release | More dopamine, norepinephrine |
↓ Catecholamine reuptake | Prolonged neurotransmitter effects |
↑ CNS activity | Heightened arousal, alertness |
↑ Heart rate, blood pressure | Cardiovascular stimulation |
↓ Perception of fatigue | Can exercise beyond normal limits |
↑ Aggression | Especially amphetamines |
Performance Effects
Effect | Description |
|---|---|
Increased alertness | Enhanced focus and concentration |
Delayed fatigue | Masks exhaustion signals |
Increased aggression | May enhance competitive drive |
Faster reaction time | CNS activation |
Enhanced power output | Short-term |
Weight loss | Appetite suppression (ephedrine) |
Health Risks
Cardiovascular
Risk | Mechanism |
|---|---|
Cardiac arrhythmias | Abnormal heart rhythms |
Sudden cardiac death | Especially with exertion in heat |
Myocardial infarction | Heart attack |
Hypertension | Elevated blood pressure |
Stroke | Cerebrovascular accident |
Neurological/Psychological
Risk | Description |
|---|---|
Addiction/dependence | High potential for abuse |
Anxiety and paranoia | Especially with high doses |
Psychosis | Hallucinations, delusions |
Seizures | CNS excitotoxicity |
Insomnia | Sleep disruption |
Depression | Especially during withdrawal |
Other
Risk | Description |
|---|---|
Hyperthermia | Body temperature dysregulation (especially in heat) |
Dehydration | Combined with heat = dangerous |
Rhabdomyolysis | Muscle breakdown |
Death | Multiple documented athletic deaths |
Historical Context
Tom Simpson (1967): British cyclist died on Mont Ventoux (amphetamines + heat)
1960 Olympics (Knud Jensen): Danish cyclist died (amphetamines)
Widespread use in 1960s-70s: Before effective testing
Detection
Method | Window |
|---|---|
Urine testing | Hours to days |
Blood testing | Shorter detection window |
Hair testing | Months (not routine in sports) |
Other Prohibited Substances and Methods
Human Growth Hormone (hGH)
Aspect | Details |
|---|---|
Mechanism | Promotes growth, muscle mass, fat metabolism |
Claimed benefits | ↑ Muscle, ↓ fat, recovery enhancement |
Actual performance benefit | Limited evidence for performance |
Health risks | Acromegaly, diabetes, cardiomyopathy, joint problems |
Detection | Isoform test, biomarker test, GH-2000 score |
Beta-2 Agonists (e.g., Clenbuterol)
Aspect | Details |
|---|---|
Medical use | Asthma treatment |
Misuse | Anabolic effects at high doses; fat loss |
Health risks | Cardiac arrhythmias, tremors, hypokalemia |
Status | Prohibited; TUE possible for asthma |
Diuretics and Masking Agents
Aspect | Details |
|---|---|
Examples | Furosemide, hydrochlorothiazide |
Misuse | Rapid weight loss (weight-class sports); dilute urine (mask other drugs) |
Health risks | Dehydration, electrolyte imbalance, hypotension |
Status | Prohibited at all times |
Blood Manipulation (M1)
Method | Description |
|---|---|
Blood transfusions | Already covered under EPO section |
Blood substitutes | Artificial oxygen carriers |
Intravascular manipulation | Altering blood in circulation |
Gene Doping (M3)
Aspect | Details |
|---|---|
Definition | Transfer of genetic material to enhance performance |
Examples | EPO gene insertion, myostatin inhibition, IGF-1 gene |
Current status | Theoretically possible; no confirmed cases |
Detection | Challenging; research ongoing |
Health risks | Unknown; potentially severe (cancer, immune reactions) |
Testing and Detection
Types of Testing
Type | Description |
|---|---|
In-competition | Random selection during/after competition |
Out-of-competition | Random testing anytime, anywhere |
Target testing | Intelligence-led testing of specific athletes |
Return-to-competition | Before returning after suspension |
Sample Collection
Sample | Uses |
|---|---|
Urine | Most substances; primary sample type |
Blood | EPO, hGH, transfusions, ABP |
Dried blood spots | Emerging method |
Athlete Biological Passport (ABP)
A longitudinal monitoring program that tracks biological variables over time:
Modules
Module | Variables Tracked |
|---|---|
Hematological | Hemoglobin, reticulocytes, OFF-score, ABPS |
Steroidal | Testosterone/epitestosterone ratio, steroid metabolites |
Endocrine | In development (GH biomarkers) |
How ABP Works
Athlete provides samples over time
Individual baseline established
Adaptive model creates expected ranges
Abnormal variations flagged
Expert panel reviews suspicious profiles
Can result in anti-doping rule violation
Advantage: Detects effects of doping even if substance not directly found
Testing Statistics (WADA Annual Reports)
Year | Samples Analyzed | Adverse Findings |
|---|---|---|
2019 | ~280,000 | ~2% |
2020 | ~170,000 (COVID impact) | ~1.5% |
2021 | ~260,000 | ~1.5% |
Sanctions for Anti-Doping Rule Violations
Standard Sanctions
Violation | First Offense | Second Offense |
|---|---|---|
Presence of prohibited substance | 4 years | 8 years to lifetime |
Intentional violation | 4 years | Lifetime |
Non-intentional violation | 2 years | 4-8 years |
Specified substances (non-intentional) | Warning to 2 years | Case-dependent |
Trafficking | 4-lifetime | Lifetime |
Whereabouts failures (3 in 12 months) | Up to 2 years | Case-dependent |
Aggravating and Mitigating Factors
Factor | Effect |
|---|---|
Aggravating | Increases sanction (e.g., multiple substances, using during doping control, deception) |
Mitigating | Reduces sanction (e.g., substantial assistance, prompt admission, no significant fault) |
Consequences Beyond Suspension
Consequence | Impact |
|---|---|
Disqualification of results | Medals, records, prize money forfeited |
Financial loss | Sponsorships, contracts terminated |
Reputation | Career-ending damage |
Criminal charges | In some jurisdictions |
Health consequences | Long-term damage from substances |
Famous Doping Cases
Athlete | Sport | Substance/Method | Outcome |
|---|---|---|---|
Ben Johnson | Sprinting | Stanozolol | Stripped of 1988 Olympic gold |
Marion Jones | Track & Field | Steroids, EPO | Stripped of 5 Olympic medals; prison |
Lance Armstrong | Cycling | EPO, testosterone, transfusions | Stripped of 7 Tour titles; lifetime ban |
Maria Sharapova | Tennis | Meldonium | 15-month ban (reduced) |
Russia (state program) | Multiple | Systematic doping | Partial Olympic ban; ongoing sanctions |
Justin Gatlin | Sprinting | Amphetamines, testosterone | Multiple bans |
Alberto Contador | Cycling | Clenbuterol | Stripped of Tour/Giro titles |
Prevention and Education
WADA Education Programs
Program | Target |
|---|---|
ALPHA (Anti-Doping Learning Platform) | Online education |
Outreach programs | Major events |
Coach/support personnel education | Those around athletes |
Youth programs | Clean sport values early |
Athlete Responsibilities
Know the rules: Understand prohibited list
Check all substances: Use resources like Global DRO
Declare medications: On doping control forms
Apply for TUEs: In advance if needed
Be available for testing: Whereabouts compliance
Report violations: Whistleblowing mechanisms
Resources
Resource | Purpose |
|---|---|
Global DRO | Check medication status |
WADA website | Rules, prohibited list, education |
National Anti-Doping Organization | Country-specific guidance |
Sport federation | Sport-specific rules |
Summary: Why Doping is Prohibited
Reason | Explanation |
|---|---|
Health | Serious risks, including death |
Fair play | Violates spirit of equal competition |
Integrity | Undermines sport credibility |
Role models | Athletes influence youth |
Legal | May violate criminal laws |
Ethics | Contradicts sporting values |
Exam Tips
Know WADA's role: Sets rules, maintains prohibited list, monitors compliance
Understand major categories: Steroids, EPO, stimulants (mechanisms and risks)
Steroid effects: ↑ Muscle mass, ↑ strength, but serious health risks
EPO mechanism: ↑ Red blood cells → ↑ oxygen carrying → ↑ endurance; risks = blood clots, death
Stimulant risks: Cardiac events, hyperthermia, addiction, death
Athlete Biological Passport: Longitudinal monitoring to detect doping effects
TUEs: Legitimate medical use requires application and approval
Sanctions: 4 years standard for intentional first offense
Health risks dominate: All categories carry serious, sometimes fatal risks
Apply to cases: Be able to discuss famous cases and their outcomes
Final Summary: All Three Topics
Topic | Key Points |
|---|---|
Glycaemic Index | GI measures blood glucose response; low GI before exercise, high GI during/after; GL accounts for portion size |
Body Composition | Multiple methods (skinfolds, BIA, DEXA); essential fat differs by sex; RED-S from low energy availability |
Weight Management Risks | Rapid weight loss dangerous; RED-S causes hormonal, bone, performance, psychological effects |
Supplements | Creatine (PCr), caffeine (adenosine), beta-alanine (carnosine), nitrates (NO); all have specific mechanisms and evidence |
Doping | WADA coordinates; steroids, EPO, stimulants are major categories; serious health risks; ABP for detection |