Butterfly Technique Singapore: How to Build a More Efficient Stroke

Butterfly is often treated as the most physically demanding swimming stroke, but strength alone does not produce an efficient butterfly. The stroke depends on rhythm: the body, kick, pull, breathing and recovery must work together in the right sequence. When one part happens too early or too late, the swimmer usually compensates by forcing the arms, lifting the head or kicking harder.

For swimmers in Singapore who already know the basic butterfly movement but struggle to maintain it across a full length, the first question should not be, “How do I get stronger?” It should be, “Where is my timing breaking down?” At SWIM2000, Coach Lee Yucong and the coaching team use technique-first correction to identify these efficiency losses before adding more speed or distance.

This guide explains the main parts of butterfly technique, the mistakes that commonly make the stroke exhausting, and what swimmers should focus on when trying to build a smoother and more sustainable stroke.

What Makes Butterfly Different From the Other Strokes?

Butterfly is a simultaneous stroke. Both arms recover together, both legs perform the dolphin kick together, and the swimmer relies on a continuous wave-like body movement to connect each phase.

That creates a simple technical problem: there are fewer opportunities to hide poor timing.

In freestyle, one arm can continue moving while the other recovers. In breaststroke, there is a clear glide phase. Butterfly demands a more continuous rhythm. If the swimmer pauses after the pull, lifts the chest too high to breathe or begins the recovery without enough forward momentum, the stroke can quickly become heavy.

Efficient butterfly therefore comes from coordination rather than isolated power. The swimmer needs enough propulsion to move forward, but also needs to reduce unnecessary resistance and preserve rhythm from one cycle to the next.

Start With the Body Dolphin, Not the Arms

A common mistake is learning butterfly as an arm stroke with a dolphin kick added underneath. The better starting point is the body movement.

The butterfly body dolphin is a controlled wave through the body. The movement begins through the upper body and travels through the hips into the legs. It should not look like a large bend at the waist, and it should not come entirely from the knees.

A useful objective is to keep the movement flowing forward rather than bouncing vertically. Excessive up-and-down movement wastes energy because the swimmer is spending effort lifting the body instead of travelling down the pool.

Swimmers developing the body dolphin should pay attention to three things:

• Keep the neck relaxed and aligned with the body.
• Allow the hips to respond naturally to the chest movement.
• Finish the wave through the legs without turning the kick into a bicycle-like knee action.

When the body dolphin becomes smoother, the arms have a better platform from which to pull and recover.

Understand the Two-Kick Rhythm

Butterfly is commonly swum with two dolphin kicks during each complete arm cycle. The important point is not simply performing two kicks; it is placing them correctly within the stroke.

The first kick supports the entry and forward extension of the arms. The second kick works with the finishing phase of the pull and helps the body maintain momentum into the arm recovery.

Swimmers who lose this rhythm often show one of two patterns. Some perform both kicks too close together, leaving a dead section in the stroke. Others produce one very large kick and one weak or almost absent kick.

Rather than thinking “kick twice,” think about connecting each kick to a specific phase of the arm action. This makes the rhythm easier to repeat and helps prevent the legs from operating independently from the rest of the stroke.

Build an Effective Butterfly Pull

After the hands enter the water, the swimmer needs to establish a useful position before applying force. Rushing immediately into a hard pull can cause the hands and elbows to slip through the water without creating effective propulsion.

The pull should help move the body forward while preparing the arms to exit cleanly for recovery. The hands travel through the underwater phase and accelerate as the stroke progresses, finishing near the hips before the arms leave the water.

Three problems frequently make the pull inefficient:

Pulling Too Wide

An excessively wide pull can make it difficult to maintain pressure on the water and may disrupt the connection between the arms and body rhythm.

Dropping the Elbows

When the elbows collapse during the underwater phase, the swimmer may lose a strong position for directing force backward.

Finishing Too Early

If the hands exit before the pull is properly completed, the swimmer loses momentum just before the recovery begins. This often leads to a recovery that feels forced.

The objective is not to make the pull as powerful as possible. It is to create enough effective propulsion while preserving the timing needed for the next phase.

Keep the Arm Recovery Relaxed

Many swimmers associate butterfly with a dramatic, muscular arm recovery. In practice, excessive tension makes repeated cycles harder.

Once the underwater pull finishes, the arms should recover over the water with enough relaxation to return to the front without unnecessary effort. The shoulders need suitable mobility, but the swimmer should not try to lift the entire upper body simply to clear the arms.

A recovery that repeatedly catches the water or feels extremely difficult can be a symptom of an earlier timing problem. The cause may be a weak finish to the pull, poor second-kick timing, excessive vertical movement or a breath that keeps the head raised too long.

This is why butterfly correction works best when the whole stroke is assessed rather than when a coach looks only at the arms.

Fix Butterfly Breathing Without Breaking the Stroke

Breathing is one of the most common points where butterfly rhythm breaks down.

The swimmer needs to raise the mouth sufficiently to inhale, but lifting the head and chest too high increases resistance and can drive the hips downward. Once the hips drop, the next cycle requires more effort to restore body position.

A more efficient breath stays connected to the pull. As the upper body rises naturally during the stroke, the swimmer takes the breath and then returns the head toward a neutral position as the arms recover forward.

The head should not remain lifted while the hands are entering for the next cycle.

For swimmers who repeatedly lose rhythm when breathing, it can be useful to compare non-breathing cycles with breathing cycles. If the non-breathing butterfly is noticeably smoother, the breathing action is probably changing body position or timing.

Why Butterfly Often Feels Exhausting After 25 Metres

A swimmer may have enough fitness to complete longer distances in freestyle or breaststroke yet struggle to maintain butterfly. This does not automatically mean poor conditioning.

Butterfly amplifies technical inefficiency. A small timing error repeated every cycle can create a large energy cost over one length.

Common causes include:

• Lifting too high during the breath.
• Pausing after the arms enter the water.
• Using the knees excessively during the dolphin kick.
• Recovering the arms with too much tension.
• Losing the second kick.
• Pulling harder when rhythm begins to deteriorate.

When fatigue appears, swimmers often respond by increasing effort. That can make the problem worse. A better approach is to identify the first technical change that occurs as the swimmer tires. That change is often the most useful correction target.

Drills Should Solve a Specific Butterfly Problem

Butterfly drills are useful only when they have a clear purpose. Repeating a drill without understanding what it is meant to correct can reinforce movement without improving the full stroke.

Body dolphin drills can help swimmers understand the wave action and reduce excessive knee-driven kicking. Single-arm butterfly can reduce coordination demands while allowing the swimmer to work on timing, breathing and the underwater pull. Short full-stroke repetitions can help transfer improvements back into complete butterfly without allowing fatigue to destroy the movement pattern.

The key is progression. A swimmer should be able to explain what the drill is correcting and then reproduce that improvement when returning to the complete stroke.

If the same fault immediately returns during full butterfly, the drill has not yet transferred into the stroke.

When Does Butterfly Need Stroke Correction?

A swimmer does not need to wait until the stroke completely breaks down before seeking technical help. Butterfly is a good candidate for targeted correction because relatively small timing changes can affect several other parts of the stroke.

Consider a focused assessment if you can complete butterfly but consistently experience problems such as:

• Arms failing to clear the water comfortably.
• Hips dropping during every breath.
• Dolphin kick coming mainly from the knees.
• Losing rhythm after a few cycles.
• One kick disappearing from the stroke.
• Large differences between breathing and non-breathing cycles.
• Needing much more effort without gaining speed.

SWIM2000’s stroke correction clinic is designed for swimmers who can already swim but need help identifying and correcting specific technical faults. Lessons are available through SWIM2000’s programmes at Yishun Swimming Complex and Bukit Canberra Swimming Complex.

A Practical Order for Improving Butterfly Technique

Trying to correct everything at once usually creates confusion. A more useful sequence is to work from the foundation of the stroke outward.

First, establish a controlled body dolphin. Second, make the two-kick rhythm repeatable. Third, connect the underwater pull to the body movement. Fourth, make the arm recovery relaxed and continuous. Fifth, integrate breathing without changing the established rhythm. Only after these elements are reasonably stable should the swimmer focus heavily on increasing distance or speed.

This order is not a rigid rule for every swimmer. A coach may identify a different primary fault during assessment. The principle is to fix the movement that is creating the largest downstream problem instead of treating every visible symptom separately.

Frequently Asked Questions

Is butterfly mainly about strength?

No. Strength can support performance, but efficient butterfly depends heavily on body position, timing, rhythm and coordination. A strong swimmer with poor timing can still find butterfly extremely tiring.

How many kicks are used in one butterfly stroke cycle?

A standard butterfly cycle uses two dolphin kicks. Their timing relative to the arm action matters more than simply counting two kicks.

Why do my hips sink when I breathe in butterfly?

A common cause is lifting the head or chest too high or keeping the head raised too long. This changes body position and can increase resistance before the next stroke cycle.

Why can I swim butterfly without breathing but struggle when I breathe?

Your breathing action may be interrupting the rhythm. Compare your head position, body height and timing between breathing and non-breathing cycles to identify what changes.

Should I practise butterfly when I am already very tired?

If fatigue causes your technique to collapse, repeated poor-quality cycles may not help the correction process. Shorter repetitions with controlled technique can be more useful when working on a specific fault.

Can beginners learn butterfly?

Butterfly can be introduced progressively once a swimmer has suitable water confidence and body control. The full stroke does not need to be taught all at once.

Where can I get butterfly stroke correction in Singapore?

Swimmers who already know the stroke but want targeted technical feedback can explore SWIM2000’s stroke correction clinic and review common programme questions on the FAQ page.

Build Rhythm Before Chasing Speed

The most useful way to improve butterfly is to stop treating every difficulty as a fitness problem. Butterfly becomes sustainable when the body dolphin, kicks, pull, recovery and breathing reinforce one another instead of competing for timing.

If your stroke feels smooth for only a few cycles, identify exactly what changes before it becomes difficult. That first breakdown is more informative than the fatigue that follows it. Build the rhythm, remove the largest efficiency loss, and then add distance and speed on top of a stroke that can be repeated consistently.