Introduction
Swimming is the movement of the body through water using coordinated arm and leg actions. It is practiced for recreation, fitness, safety, transportation, and competition.
Competitive swimming tests speed, endurance, technique, efficiency, starts, turns, and underwater movement. The four major competitive strokes are freestyle, backstroke, breaststroke, and butterfly. Swimmers also combine the strokes in individual medley and medley relay events. World Aquatics is the international governing body responsible for competitive swimming rules.
Swimming has appeared at every modern Olympic Games. Early Olympic competitions sometimes took place in open water, while the London 1908 Games staged Olympic swimming in a pool and helped establish standardized international competition.
Learning Objectives
After studying this guide, you should be able to:
Identify and describe the four competitive swimming strokes.
Distinguish freestyle, medley, relay, long-course, and short-course swimming.
Explain basic starts, turns, finishes, and lane-racing rules.
Recognize important race distances and competition formats.
Understand swimming terminology such as split, heat, seed, false start, and personal best.
Explain how pool swimming differs from open-water swimming.
The Four Competitive Strokes
Competitive swimming uses four major strokes:
Freestyle
Backstroke
Breaststroke
Butterfly
Each stroke has its own technical rules.
Memory Tip
Free → fastest choice
Back → face upward
Breast → simultaneous pull and kick
Fly → simultaneous arms + dolphin kick
Freestyle
In a freestyle event, swimmers may use any permitted style of swimming.
In practice, competitive swimmers almost always use the front crawl because it is generally the fastest swimming stroke. World Aquatics describes freestyle as one of the fundamental competitive swimming categories.
Front crawl technique normally includes:
Alternating arm strokes
Alternating flutter kicks
Side breathing
Streamlined body position
During longer races, swimmers must balance speed with energy conservation.
Freestyle Is Not the Same as Front Crawl
This distinction often appears in quizzes.
Freestyle is the event category.
Front crawl is the stroke normally chosen in freestyle races.
Backstroke
Backstroke is performed primarily while the swimmer is on the back.
Unlike the other standard pool strokes, backstroke begins in the water rather than with a forward dive from the starting block.
Backstroke technique normally uses:
Alternating arms
Flutter kick
Face above the water for much of the stroke
Rotation through the shoulders and hips
Swimmers must judge the approaching wall carefully because they cannot simply look forward at it throughout the race.
Pool markings and overhead flags help swimmers estimate their distance from the wall.
Breaststroke
Breaststroke has a distinctive simultaneous arm pull and leg kick.
The arms move together, while the legs perform a frog-like kick in which the feet turn outward during the propulsive phase.
Breaststroke is highly technical. Timing between the:
Pull → Breath → Kick → Glide
is essential for efficient movement.
At elite level, small technical errors can result in disqualification because the stroke has detailed rules governing arm and leg movement.
Butterfly
Butterfly is performed with both arms moving together while the legs use a simultaneous dolphin kick.
A typical cycle includes:
Underwater arm pull
Powerful body undulation
Simultaneous arm recovery over the water
Dolphin kicks
Butterfly requires significant strength, coordination, rhythm, and endurance.
It developed historically from breaststroke techniques before becoming recognized as a separate competitive stroke.
Which Stroke Is Fastest?
In conventional competitive swimming, freestyle performed with front crawl is generally the fastest of the four major strokes.
A useful general ordering is:
Freestyle → Butterfly → Backstroke → Breaststroke
Actual speeds vary by distance and swimmer.
World Aquatics similarly identifies freestyle as the fastest major competitive style.
Individual Medley
The individual medley, often abbreviated IM, requires one swimmer to perform all four strokes.
The order is:
Butterfly → Backstroke → Breaststroke → Freestyle
Memory Tip
Use:
Fly → Back → Breast → Free
Individual medley races test versatility because competitors must master every stroke.
Medley Relay
A medley relay also includes all four strokes, but four different swimmers each complete one leg.
The order differs from the individual medley:
Backstroke → Breaststroke → Butterfly → Freestyle
Why does backstroke come first?
The backstroke swimmer must start in the water, while later relay swimmers start from the pool deck.
Important Quiz Distinction
Individual medley: Butterfly, Backstroke, Breaststroke, Freestyle
Medley relay: Backstroke, Breaststroke, Butterfly, Freestyle
Freestyle Relays
In a freestyle relay, swimmers compete in teams.
Common formats include:
4 × 100m freestyle
4 × 200m freestyle
The first swimmer starts normally.
Later swimmers may begin when the previous teammate reaches the wall, subject to relay-exchange rules.
A team can lose an otherwise excellent performance if a swimmer leaves too early.
Long-Course Swimming
A long-course swimming pool is:
50 metres long
World Aquatics Championships and Olympic pool swimming are conducted in 50-metre pools.
A 100m race therefore requires:
2 lengths of a 50m pool
while a 400m race requires:
8 lengths
Short-Course Swimming
A short-course pool is:
25 metres long
World Aquatics publishes separate competition and officiating materials for 25m and 50m swimming.
Short-course racing involves more turns than long-course racing.
For example:
100m in 25m pool → 4 lengths
100m in 50m pool → 2 lengths
Because turns and underwater push-offs can be extremely fast, short-course and long-course records are kept separately.
Common Race Distances
Pool swimming includes many race distances.
Common individual freestyle distances include:
50m
100m
200m
400m
800m
1500m
Common stroke-specific races include:
50m
100m
200m
depending on the competition programme.
Individual medley races commonly include:
200m IM
400m IM
World Aquatics programmes also include freestyle and medley relays.
The Swimming Start
For freestyle, breaststroke, butterfly, and individual medley races, swimmers normally begin from starting blocks.
A typical start involves:
Ready position
Starting signal
Dive
Streamlined underwater phase
Breakout into the stroke
A good start can be especially important in sprint events.
Backstroke Start
Backstroke begins differently.
Swimmers start:
In the water
Facing the starting end
Holding starting grips
They push backward from the wall after the signal.
Modern elite pools may also use approved backstroke starting ledges that help swimmers position their feet. World Aquatics regulations specify technical requirements for these devices.
False Starts
A false start occurs when a swimmer begins illegally before the proper starting procedure is completed.
At elite competition, an early start can lead to disqualification.
Swimming therefore demands both explosive reactions and control.
Streamlining
A streamline is a narrow body position designed to reduce water resistance.
The swimmer typically:
Extends the arms overhead.
Keeps the body straight.
Reduces unnecessary frontal area.
Streamlining is especially important:
After the start
After turns
Good swimmers do not simply generate more force; they also reduce drag.
Turns
Turns allow swimmers to change direction rapidly at the wall.
Different strokes use different turn techniques.
Freestyle Turn
Competitive freestyle swimmers commonly use the flip turn, or tumble turn.
The swimmer somersaults near the wall, places the feet against it, pushes away, and streamlines.
Backstroke Turn
Backstroke turns involve specialized timing and rotation before the swimmer pushes away from the wall.
Breaststroke and Butterfly Turns
In breaststroke and butterfly, swimmers must make the required legal contact with the wall according to the stroke rules.
Elite swimmers try to touch, rotate, and push away with as little lost time as possible.
Underwater Swimming
The underwater phase after starts and turns can be extremely fast because swimmers can reduce surface-wave resistance.
Swimmers often use powerful dolphin kicks underwater in strokes where the rules permit them.
However, competitive rules limit how far swimmers may remain submerged in several events.
This prevents races from becoming primarily underwater competitions rather than surface swimming.
The Finish
A race is completed when the swimmer legally touches the finish wall.
In very close races, electronic timing systems can separate swimmers by extremely small fractions of a second.
Technique matters all the way to the wall. Taking an unnecessary final stroke or gliding too early can decide a race.
Heats, Semifinals, and Finals
Large competitions may use several rounds.
Heat
A heat is an early qualifying race.
Semifinal
A semifinal reduces the field before the medal race in events using that format.
Final
The final determines the leading places and medals.
Advancement normally depends primarily on swimming time rather than simply finishing position within one particular heat.
Lane Seeding
Swimmers are assigned lanes according to competition rules and qualifying performances.
Faster qualifiers are commonly placed in central lanes for finals.
This does not create a different race distance. All lanes are intended to provide the same competitive course.
Splits
A split records the time taken to complete part of a race.
For example, a 200m freestyle race might have 50m splits.
Coaches use splits to evaluate:
Pace
Fatigue
Race strategy
Closing speed
A swimmer who starts too quickly may record an excellent first split but slow dramatically later.
Personal Best and Records
A personal best (PB) is the fastest recognized time achieved by an individual swimmer.
Other record categories include:
National record
Championship record
World record
Long-course and short-course world records are separate because pool length affects turn frequency.
Open-Water Swimming
Open-water swimming takes place outside a swimming pool.
Possible venues include:
Lakes
Rivers
Seas
Coastal waters
Open-water swimmers must cope with conditions that pool swimmers do not normally face, such as:
Waves
Currents
Changing water temperature
Navigation
Physical contact within large groups
Marathon Swimming
The Olympic open-water event is known as marathon swimming.
The Olympic distance is:
10 kilometres
The men's and women's Olympic 10km events were introduced at Beijing 2008.
Unlike a pool race, marathon swimmers must navigate around course markers rather than following lane lines.
Pool Swimming vs Open Water
Feature | Pool Swimming | Open-Water Swimming |
Venue | Pool | Lake, river, sea or other open water |
Lanes | Usually yes | No normal lane separation |
Turns | Frequent wall turns | Course-marker turns |
Conditions | Controlled | Variable |
Navigation | Minimal | Important |
Olympic marathon distance | — | 10 km |
Swimming Equipment
Competitive swimmers commonly use:
Swimsuit
Goggles
Swim cap
Training equipment can also include:
Kickboards
Pull buoys
Hand paddles
Fins
Snorkels
Training aids are generally not used as propulsion devices during ordinary competitive races.
World Aquatics maintains regulations covering approved competition swimwear.
Goggles
Goggles help swimmers see underwater and protect the eyes from pool water.
Good goggles should:
Seal properly
Remain secure during dives
Avoid excessive water leakage
A lost or flooded pair of goggles does not necessarily stop an elite swimmer from completing a race, but it can make racing considerably harder.
Swim Caps
Caps help:
Keep hair controlled
Reduce some resistance
Improve visibility of competitors
Caps can also display national, team, or competition identification.
Swimming and Fitness
Swimming develops several components of fitness.
Cardiovascular Endurance
Distance swimming challenges the heart and lungs.
Muscular Endurance
Repeated strokes require sustained effort from the:
Shoulders
Back
Core
Hips
Legs
Coordination
Efficient swimming requires precise timing between breathing, arm actions, and kicks.
Flexibility
Shoulder, ankle, and hip mobility can contribute to efficient technique.
Drag and Propulsion
Swimming depends on the relationship between propulsion and drag.
Propulsion moves the swimmer forward.
Drag resists that movement.
Competitive technique therefore seeks to:
Increase useful propulsion + reduce unnecessary resistance
Body position is especially important because a poorly aligned swimmer pushes more water out of the way.
Breathing
Breathing differs among strokes.
Freestyle
Swimmers commonly rotate the head to the side.
Backstroke
The face is generally above the water, although breathing rhythm still matters.
Breaststroke
Breathing coordinates with the arm pull and body movement.
Butterfly
Breathing usually occurs during the arm pull and recovery cycle.
Poor breathing timing can disrupt the entire stroke.
History of Competitive Swimming
Swimming has ancient origins, but standardized international competition developed much later.
Swimming appeared at the first modern Olympics in Athens 1896, although the early events were held in open water. The London 1908 Olympic Games used a pool for Olympic swimming and coincided with the establishment of the international federation that eventually became World Aquatics.
Women's Olympic swimming began at Stockholm 1912.
Over time, new events, strokes, technologies, training methods, and timing systems transformed competitive swimming.
Major Swimming Competitions
Important international competitions include:
Olympic Games
World Aquatics Championships
World Aquatics Swimming World Cup
World Aquatics Swimming Championships (25m)
Continental championships
National championships
Competition programmes and regulations can change, so current event details should be checked with the governing body. World Aquatics lists its current swimming documents and regulations online.
Officiating
Swimming competitions use officials to ensure that:
Starts are legal.
Stroke rules are followed.
Turns are performed correctly.
Relay exchanges comply with rules.
Finishes are properly recorded.
Modern competitions may also use electronic timing and video judging. World Aquatics publishes specific officiating and video-judging protocols.
Common Mistakes
Freestyle Does Not Technically Mean Front Crawl
Freestyle allows the swimmer to choose a stroke under the event rules. Front crawl is simply the fastest common choice.
Backstroke Starts in the Water
It does not use the same forward block start as freestyle, breaststroke, or butterfly.
Individual Medley and Medley Relay Use Different Orders
IM → Fly, Back, Breast, Free
Relay → Back, Breast, Fly, Free
Short Course and Long Course Are Not the Same
Short course → 25m
Long course → 50m
Records are maintained separately.
Butterfly Is Not Simply "Fast Breaststroke"
Butterfly is a separate stroke with its own arm action, kick, and technical rules.
Open-Water Swimming Is Not Just Pool Swimming Without Walls
Navigation, water conditions, currents, group positioning, and temperature add different tactical demands.
Memory Tips
For strokes:
F → Freestyle
B → Backstroke
B → Breaststroke
F → Butterfly
To avoid confusing the two B strokes, remember:
Back = face up
Breast = frog-style kick
For medleys:
Individual → Fly, Back, Breast, Free
Relay → Back, Breast, Fly, Free
For pools:
25m → short course
50m → long course
For competition:
Heat → qualify
Semifinal → narrow field
Final → medals
Summary
Swimming is both a life skill and a major competitive sport. Competitive pool swimming uses four primary strokes: freestyle, backstroke, breaststroke, and butterfly.
Freestyle events are usually swum with front crawl. Backstroke begins in the water, breaststroke uses simultaneous arm and leg actions, and butterfly combines simultaneous arm recovery with dolphin kicking.
Individual medley follows the order butterfly, backstroke, breaststroke, freestyle, while medley relays begin with backstroke.
Long-course pools measure 50 metres, while short-course pools measure 25 metres. Starts, turns, underwater phases, streamlining, pacing, and finishes can all determine race results.
Open-water swimming introduces different challenges, including navigation, waves, currents, and changing conditions. Olympic marathon swimming uses a 10km open-water course.
For quizzes, remember each stroke's defining action, the two medley orders, the difference between short and long course, and common terms such as heat, split, relay, personal best, and false start.
FAQ
What are the four competitive swimming strokes?
Freestyle, backstroke, breaststroke, and butterfly.
What is the fastest competitive swimming stroke?
Front crawl, which is normally used in freestyle events.
Does freestyle mean front crawl?
Not exactly. Freestyle is the event category, while front crawl is the stroke competitors almost universally choose because of its speed.
What is the individual medley order?
Butterfly → Backstroke → Breaststroke → Freestyle
What is the medley relay order?
Backstroke → Breaststroke → Butterfly → Freestyle
How long is an Olympic swimming pool?
Olympic pool swimming uses a 50-metre long-course pool.
What is short-course swimming?
Swimming competition conducted in a 25-metre pool. World Aquatics maintains separate long- and short-course competition materials.
Which stroke starts in the water?
Backstroke.
What is a swimming split?
A split is the time recorded for a particular section of a race.
How long is Olympic marathon swimming?
The Olympic marathon-swimming race is 10 kilometres.
Key Takeaways
Competitive swimming uses freestyle, backstroke, breaststroke, and butterfly, while medleys combine all four.
Individual medley and medley relay use different stroke orders, an important quiz distinction.
Long-course pools are 50 metres and short-course pools are 25 metres, so their records are maintained separately.
Starts, streamlining, turns, underwater phases, breathing, and finishes can be as important as surface stroke technique.
Open-water marathon swimming adds navigation and environmental challenges, with the Olympic event contested over 10 km.
References
World Aquatics — Swimming Rules Official source for international competitive swimming rules and links to current competition regulations.
World Aquatics — Swimming RulesWorld Aquatics — Competition Regulations Current international competition regulations covering swimming and other aquatic disciplines.
World Aquatics — Competition RegulationsWorld Aquatics — Swimming Documents Current officiating protocols, reference cards, forms, warm-up guidelines, and other official swimming documents.
World Aquatics — Swimming DocumentsWorld Aquatics — Swimming History and Presentation Educational overview of swimming history, competitive strokes, Olympic racing, long-course pools, relays, and major events.
World Aquatics — Swimming HistoryWorld Aquatics — Open Water Swimming Official competition and information hub for international open-water and marathon swimming.
World Aquatics — Open Water SwimmingWorld Aquatics — Olympic Marathon Swimming Overview Background on the Olympic 10km marathon-swimming event and its development since Beijing 2008.
World Aquatics — Olympic Marathon SwimmingOlympic World Library — Olympic Swimming History Olympic archival material covering early swimming competition, the introduction of pool racing, and the major competitive strokes.
Olympic World Library — SwimmingWorld Aquatics — Rules and Governance Official governing documents for World Aquatics and its competitive disciplines.
World Aquatics — Rules