Butterfly Stroke for Beginners
Break butterfly into four learnable pieces: body wave, kick timing, arm recovery, and breathing. Progressions, common mistakes, and drills for your first 25m.
Butterfly is the only stroke that looks harder than it actually is—and it's still brutally hard. This guide breaks down dolphin kick, arm technique, and breathing into drills you can practice poolside today. You'll leave with a workout that builds the stroke from the ground up.
Why Butterfly Breaks Most Swimmers
Freestyle is a series of independent cycles. Each arm pulls while the other recovers. Your legs kick in their own rhythm. Butterfly doesn't work that way. Both arms recovery simultaneously. Both legs move together. Your body undulates in one continuous wave. Breathe wrong and the whole thing collapses.
The stroke was invented in 1936 by a swimmer who imitated a dolphin out of water. It wasn't swum competitively until 1953. Even now, only 15% of competitive swimmers choose it as their best event. That tells you something.
But here's what the coaches won't tell you in the first session: once you feel the rhythm, butterfly stops being hard and starts being exhilarating. That first smooth 50m where everything clicks is one of swimming's great moments. You won't get there reading articles. You get there by swimming the drills below—consistently, with intent.
The Dolphin Kick: Your Foundation
Forget everything you know about flutter kick. Dolphin kick is the opposite of everything that works in freestyle. Your legs don't drive the movement—your hips do. The kick flows from your core, through your thighs, and out through pointed toes. Your knees bend slightly on the downbeat, then snap straight as you flick your feet together.
Start in streamline with a kickboard pressed flat against your thighs. Yes, it will sink. That's the point—you're learning to generate forward propulsion from your core, not from your feet. Take a breath, push off, and perform 6 dolphin kicks underwater. Surface. Repeat. Do this 16 times before you add arms.
Most beginners kick with their knees, which creates a floppy, inefficient wave. Watch your reflection in the pool wall. If your thighs are moving more than your calves, you're doing it wrong. The power comes from your hips bending 30-40 degrees. Your lower legs amplify that motion.
Time yourself holding streamline underwater. Beginner target: 25 meters in under 30 seconds with 6 kicks. Intermediate: 20 seconds. Advanced: 15 seconds. If you can\'t do it in 30 seconds, your kick isn\'t propelling you—it\'s just making you bubble.
The Double Arm Pull: Where Power Lives
Butterfly arms move in a Y-M-C pattern. Your hands enter at shoulder width, slightly in front of your head. They sweep outward in a Y shape. Then they sweep inward and back in an M. Finally, they exit near your thighs in a C recovery.
The catch phase—the Y portion—should feel like you're pulling water toward your hips. Your elbows stay high, above the water line. Your forearms stay vertical. Press water backward, not downward. If you're descending instead of moving forward, your catch angle is wrong.
The pull-through (the M) generates 70% of your propulsion. Accelerate your hands toward your hips. At peak acceleration, your hands travel fastest. Imagine pushing two bowling balls underwater—that's the pressure your forearms should feel.
The recovery—your arms leaving the water—should be continuous and unhurried. Your hands exit near your thighs, then immediately arc forward for the next entry. A common mistake is pausing at the hips. Another is throwing your arms too wide on the recovery. Keep your elbows leading until your hands clear the surface.
Breathing: The Rhythm Killer
Breathe forward, not up. Lift your chin just enough for your mouth to clear the surface. Keep one goggle lens submerged. Look at the bottom of the pool. This sounds counterintuitive—most beginners lift their whole head and sink their hips. Resist the urge. The water level at your face should barely move.
Breathe every stroke initially. Yes, every single one. It keeps you oxygenated and lets you focus on everything else. Once you can swim 50m without gasping, extend to breathing every 2 strokes. Race distance butterfly (200m) is typically swum at 2:1 breathing. Sprint events (100m) sometimes use 1:1 breathing for maximum oxygen.
The exhale is as important as the inhale. Exhale fully underwater through your nose or mouth. Don't hold your breath. When your face rotates for air, you want an empty lung, not a full one. A common mistake is exhaling too late—you'll gasp mid-stroke and disrupt your rhythm.
Practice breathing in front of a mirror dry (yes, standing in your kitchen counts). Lift your chin while keeping your torso vertical. Your neck should extend, not your spine. Now try it in the pool: if your hips sink when you breathe, you\'re lifting your head instead of extending your neck.
Putting It Together: The Full Stroke Timing
At full stroke, the sequence is: catch, pull-through, exit, and recovery happen while two dolphin kicks occur. The first kick fires as your hands enter. The second kick fires as your hands exit. This creates the undulating wave that defines butterfly.
Your head position follows your hips. When your hips rise, your head stays neutral. When your hips drop, your head stays neutral. The undulation comes from your core, not your neck. If your head is moving up and down independently, your timing is broken.
Most swimmers develop the full stroke in this order: dolphin kick alone (3-4 weeks), single arm butterfly (2-3 weeks), catch-up butterfly (1-2 weeks), full stroke at slow speed (2-4 weeks). Rushing this timeline creates compensations that take months to fix.
A drill that accelerates this process: swim butterfly at 30% speed, focusing on one element per length. Length 1: catch position. Length 2: pull-through acceleration. Length 3: recovery arc. Length 4: kick synchronization. This method builds muscle memory without ingraining bad habits.
5 Drills to Build Your Butterfly
Drills aren't supplementary work. They're the work. A swimmer who masters these 5 drills will develop a butterfly stroke that swimmers envy. Do them in order, progressing only when the current drill feels effortless.
Common Butterfly Mistakes and How to Fix Them
Hips sinking on the recovery: This usually means your kick is too slow or too shallow. Increase your kick amplitude—your heels should break the surface slightly. Keep your core engaged. A relaxed core is a sinking core.
Scissor kick (legs splitting apart): Your dolphin kick isn\'t unified. Squeeze a tennis ball between your thighs. Yes, you\'ll feel ridiculous. It works. Practice streamline kicks until the squeeze becomes automatic.
Arms landing flat on entry: You need strong internal shoulder rotation. Swim catch-up butterfly where you hold the extended arm for 5 seconds, rotating your palm to face backward each hold. This builds the rotator cuff engagement needed for proper entry.
Gasping for air every stroke: Your exhalation is incomplete. Force yourself to exhale for 3 full seconds between breaths. Count: one, two, three. Then inhale. If you\'re still gasping, your stroke rate is too high for your fitness level. Slow down.
Butterfly feeling "broken" with no single obvious cause: You\'re likely trying to swim full stroke too early. Drop back to single arm butterfly for 3 sessions. 80% of technique problems resolve when you remove one variable. Add the second arm only when single arm feels clean.
Your First Butterfly Workout
This session builds butterfly from components. It's labeled WA (lactate threshold) intensity because butterfly at these distances and intervals taxes your lactate system. Complete it once per week for 6 weeks minimum before expecting smooth full strokes.
Track your heart rate during the main set. If it exceeds 170 bpm, you're going too hard. Butterfly training should feel controlled even when you're working hard. The stroke efficiency required means you can't sustain maximal effort the way you can in freestyle.
Use the workout generator to save this session or modify distances for your pool length. The GA1/GA2 warm-up and WA intensity main set map directly to our 9 color-coded training zones. When you export to Garmin, your watch will flag the main set set as lactate threshold work—exactly what it is.
Progressing Beyond Beginner Butterfly
After 8 weeks of consistent practice, you should be able to swim 100m butterfly without stopping. Your dolphin kick should feel automatic. Your breathing should happen without thought. When you reach this point, add distance progressively: 125m, 150m, 175m, then 200m.
Intermediates should work on pace consistency. Swim 8 x 25m on :35, holding the same pace across all 8. If your times vary by more than 5 seconds, your endurance is inconsistent. Slow down your early lengths and learn to hold pace.
Advanced swimmers focus on stroke count per 25m. Elite butterflyers take 13-15 strokes per 25m. Most beginners take 25-30. Reducing your stroke count requires a larger stroke length—work on your catch position and pull-through power. Each stroke should move you further. Fewer strokes means less total energy expenditure per length.
Browse our free swim workouts library for more butterfly sessions at all levels. Filter by goal (butterfly improvement) and distance to find training plans that match where you are. Each plan includes specific drill sets and pace targets—download one before your next pool session.
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Written and maintained by AquaPlan Team, Swim Training & Product.
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