Drugs in Sport

This lesson covers the use of performance-enhancing drugs (PEDs) in sport as required by the OCR GCSE PE specification (J587, Section 2.3). OCR requires you to know three categories of banned substances: anabolic steroids, beta blockers, and stimulants. For each, you must know the effects, side effects, reasons for use, and the impact on the performer and the sport. This is a distinct and narrower list than some other exam boards — do not include drugs that are not part of the OCR specification.

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Why Do Athletes Use Drugs?

Reason	Explanation
Pressure to succeed	The financial and personal rewards for winning create a powerful incentive to cheat
Level the playing field	If a performer believes their competitors are doping, they may feel they must dope too to remain competitive
Recovery from injury	Some drugs can speed up recovery, allowing a faster return to competition
Financial gain	Winning means more prize money, sponsorship deals, and endorsements
Fear of failure	Athletes who have invested years of their life in sport may fear losing everything if their performance declines
Influence of coaches/support staff	Some athletes are pressured or instructed by coaches to use banned substances

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The Three Drug Categories (OCR)

1. Anabolic Steroids

Definition: Synthetic substances that mimic the effects of the male hormone testosterone. They promote muscle growth, increase strength, and speed up recovery.

Effects (Why Athletes Use Them)

Effect	Explanation	Sporting Benefit
Increased muscle mass	Steroids stimulate protein synthesis, causing muscles to grow larger	Greater strength and power — beneficial for sprinters, weightlifters, rugby players
Increased strength	Larger muscles generate more force	Improved performance in strength-dependent sports
Faster recovery	Steroids reduce muscle damage and inflammation, allowing harder and more frequent training	Athletes can train more intensely and recover more quickly between sessions
Increased aggression	Higher testosterone levels can increase aggressiveness	May benefit performers in contact sports by increasing assertiveness and drive

Side Effects (Risks)

Side Effect	Explanation
Liver damage	Long-term use can cause liver tumours and liver failure
Heart disease	Steroids increase cholesterol levels and blood pressure, raising the risk of heart attack and stroke
Mood swings / aggression	Uncontrolled aggression ("roid rage") can damage relationships and lead to violent behaviour
Hormonal imbalance	In males: reduced sperm count, shrinkage of testes, development of breast tissue. In females: deepening of voice, facial hair growth, menstrual irregularities
Acne	Severe skin breakouts, particularly on the back and shoulders
Tendon damage	Muscles grow faster than tendons, increasing the risk of tendon rupture

Sports Where Anabolic Steroids May Be Used

Sport	Reason
Sprinting	Increased muscle mass and power improve acceleration and top speed
Weightlifting	Greater strength allows heavier lifts
Rugby	Increased size, strength, and aggression benefit contact situations
Shot put / discus	Greater power improves throwing distance
Bodybuilding	Increased muscle size and definition

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2. Beta Blockers

Definition: Drugs that block the effects of adrenaline, reducing heart rate, lowering blood pressure, and calming the performer.

Effects (Why Athletes Use Them)

Effect	Explanation	Sporting Benefit
Reduced heart rate	Beta blockers slow the heart, creating a calming effect	Steadier hands and reduced trembling — beneficial in precision sports
Reduced anxiety	By blocking adrenaline, the performer feels less nervous	Better performance under pressure in high-stakes situations
Reduced muscle tremor	Less shaking in the hands and arms	Improved accuracy in aiming and shooting

Side Effects (Risks)

Side Effect	Explanation
Low blood pressure	Can cause dizziness, fainting, and fatigue
Tiredness / lethargy	Reduced heart rate can cause a general feeling of sluggishness
Depression	Long-term use can affect mood
Sleep disturbances	Insomnia and nightmares
Cold extremities	Reduced blood flow to hands and feet
Reduced exercise capacity	Lower heart rate limits the body's ability to perform intense aerobic exercise — making them harmful in endurance sports

Sports Where Beta Blockers May Be Used

Sport	Reason
Archery	A steady hand and calm nerves are essential for accuracy
Shooting	Reduced tremor improves aim
Snooker	A steady cue action requires minimal shaking
Golf	Reduced anxiety and steadier hands improve putting accuracy
Diving	Calmer nerves help maintain composure before and during the dive

graph TD
    BB["Beta Blockers"] --> E1["Block<br>adrenaline"]
    E1 --> E2["Lower<br>heart rate"]
    E1 --> E3["Reduce<br>anxiety"]
    E1 --> E4["Steady<br>hands"]
    E2 --> S1["Dizziness<br>Fatigue"]
    E3 --> S2["Depression<br>Sleep issues"]

    style BB fill:#2980b9,color:#fff
    style E1 fill:#27ae60,color:#fff
    style E2 fill:#27ae60,color:#fff
    style E3 fill:#27ae60,color:#fff
    style E4 fill:#27ae60,color:#fff
    style S1 fill:#e74c3c,color:#fff
    style S2 fill:#e74c3c,color:#fff

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3. Stimulants

Definition: Drugs that speed up the body's systems, increasing alertness, heart rate, and aggression while reducing the sensation of fatigue.

Effects (Why Athletes Use Them)

Effect	Explanation	Sporting Benefit
Increased alertness	The nervous system is stimulated, making the performer more aware and responsive	Faster reaction times — beneficial in any sport requiring quick responses
Increased aggression	Stimulants can make the performer more aggressive and competitive	Useful in contact sports and explosive events
Reduced fatigue	Stimulants mask the sensation of tiredness, allowing the performer to keep going longer	Beneficial in endurance events by delaying the perception of exhaustion
Increased heart rate	The cardiovascular system works harder, delivering more oxygen to muscles	Improved physical capacity in the short term

Side Effects (Risks)

Side Effect	Explanation
Heart palpitations / cardiac arrest	Stimulants increase heart rate and blood pressure, which can cause heart failure — especially during intense exercise
Insomnia	The stimulating effect makes it difficult to sleep, impairing recovery
Anxiety and paranoia	Over-stimulation of the nervous system can cause extreme anxiety
Addiction	Many stimulants are highly addictive
Dehydration	Stimulants can reduce the sensation of thirst, increasing the risk of dehydration during exercise
Aggression	Uncontrolled aggression can lead to dangerous behaviour on and off the field
Masking injury	By reducing pain and fatigue, stimulants may cause an athlete to continue competing with an injury, making it worse

Sports Where Stimulants May Be Used

Sport	Reason
Cycling	Reduced perception of fatigue allows longer, harder efforts
Sprinting	Increased alertness and reaction time at the start
Boxing	Increased aggression and reduced fatigue during rounds
Football	Increased energy and reduced tiredness during a match
Tennis	Improved alertness and reaction time during long matches

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Comparing the Three Drug Categories

Feature	Anabolic Steroids	Beta Blockers	Stimulants
Primary effect	Build muscle, increase strength	Calm nerves, steady hands	Increase alertness, reduce fatigue
Type of sport	Power and strength sports	Precision and accuracy sports	Endurance, speed, and reaction sports
Energy system	Anaerobic	Not directly related to energy systems	Both aerobic and anaerobic
Taken during competition?	Usually in training (effects are long-term)	Often before competition	Often before or during competition
Key risk	Liver/heart damage, hormonal imbalance	Low blood pressure, fatigue	Heart failure, addiction

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The Impact of Drug Use on the Performer and the Sport

Impact on the Performer

Impact	Explanation
Health risks	All three categories carry significant health risks (see side effects above)
Ban from competition	Athletes caught doping face suspensions ranging from months to lifetime bans
Loss of titles and records	Achievements earned while doping are often stripped — medals returned, records deleted
Damaged reputation	Being caught as a drug cheat destroys public trust and personal reputation
Loss of sponsorship	Sponsors typically withdraw from athletes caught doping
Criminal prosecution	In some countries, the supply and use of certain drugs is a criminal offence

Impact on the Sport