What triangle breathing is
Triangle breathing is one number used three times: breathe in for three, hold for three, breathe out for three. The timer above runs that pattern for you, so the counting is not your job.
The name comes from the shape. Three equal sides, three equal counts, and you travel round the same route every time. One full lap takes nine seconds, which works out at roughly six and a half breaths a minute — a good deal slower than the twelve to sixteen most adults breathe at rest, and slow enough that you will notice the pace has changed within a lap or two.
What makes it useful is not that it is better than the other patterns. It is that it is the one you can still remember when you are rattled. A four-part pattern with two holds asks you to keep track of where you are. Triangle asks you to count to three, three times, forever. That is a very low bar, and a low bar is exactly what you want in the ninety seconds before you walk into a room you would rather not walk into.
How to do it
- Settle somewhere steady. Sit down, or stand with your back against a wall. Let your shoulders drop away from your ears and rest your hands wherever they are comfortable. You do not have to close your eyes.
- Empty out first. Before the first count, let whatever air you are holding go. Starting from empty rather than half full makes the first in-breath much easier to time.
- Breathe in for three. Through your nose, for a slow count of three, letting the belly move before the chest. The circle above grows for exactly as long as the in-breath lasts, so you can follow the shape instead of the number.
- Hold for three. Keep the air where it is. Keep your throat and jaw soft rather than clamping shut — a held breath should feel like a pause, not like bracing. If it feels like effort, take a smaller breath in next lap.
- Breathe out for three. Through your nose or through slightly parted lips, unhurried, until the circle has shrunk back to its resting size.
- Go straight round again. No gap at the bottom. Nine seconds a lap means a three-minute session is about twenty laps. Give it several laps before you decide whether it suits you.
If you would rather practise without a screen, the sound and vibration cues in the settings panel will carry the pattern on their own. Turn the screen off, put the phone in your pocket, and follow the taps.
Drawing the triangle: classrooms and counselling rooms
Triangle breathing suits a classroom better than the more complicated patterns, and the reason is the finger. A child traces a triangle in the air, on a desk, or on the palm of one hand: up the first side while breathing in, across the top while holding, down the last side while breathing out. The hand keeps time, so nobody has to count out loud and nobody has to watch a clock.
That small physical anchor solves several real classroom problems at once. It gives a restless child something to do with their hands. It is silent, so a whole room can do it together without anyone being singled out. It needs no equipment, no app and no permission slip. And a child who has traced the triangle a hundred times at a calm desk can trace it later, on their own, in the corridor where nobody is guiding them — which is the entire point of teaching a self-regulation skill rather than performing one.
Practical shapes that work: six laps before a test, which is under a minute. One lap per person as a class settles after break. A laminated triangle taped to a quiet corner desk, so a child can go and use it without a conversation. Older students often prefer tracing the shape on a page with a pen, because it looks like schoolwork rather than like being managed.
Two honest cautions for anyone using this with a group. First, breathing is not a behaviour management tool, and children can tell instantly when it is being used as one — it works best introduced on a calm day, practised when nothing is wrong, and offered rather than instructed. Second, let anyone opt out and sit quietly instead. A child who has learned that the breathing exercise is a punishment will never use it voluntarily again.
When to use it, and when not to
Triangle earns its place in short, awkward gaps. The two minutes before a phone call. A corridor between two meetings. The moment after an argument when you would like to say the next thing carefully. It is also the pattern to pick when you cannot face remembering anything more complicated, which is more often than most people admit.
It is not the best choice everywhere. For falling asleep, a much longer out-breath does more work — try 4-7-8. If you are in or near a panic attack, skip holds entirely, because a breath-hold can feel like the very thing you are frightened of; there are gentler, hold-free patterns on the page for panic attacks. For a longer sit of ten or twenty minutes, an even pattern with no hold at all is easier to sustain; heart coherence breathing is built for that. And if you like the structure of triangle but want the extra hold at the bottom, box breathing is the same idea with four sides. You can compare all seven side by side on the timer page.
Before you use the hold
Triangle breathing holds the breath for three seconds every lap. Three seconds is short, and for most healthy adults and children it is uneventful — but a hold is still a hold, and it is worth reading this once.
- Ask a clinician before practising any breath-hold if you are pregnant, or if you live with a cardiovascular condition, uncontrolled high blood pressure, epilepsy, a respiratory condition such as asthma or COPD, glaucoma, or you have had surgery recently.
- If you live with panic attacks or a panic disorder, skip the hold. Cyclic sighing and heart coherence breathing have no hold in them at all.
- Practise sitting or lying down. Never while driving, cycling, on stairs, or in or near water.
- Stop if you feel dizzy, light-headed, tingly or short of breath, and go back to breathing normally. Feeling faint is a signal to stop, not a stage to push through.
- Do not force the in-breath. If the hold is uncomfortable, you took in too much air — take less next lap.
What the evidence shows
Honestly: nobody has run a trial on the 3-3-3 pattern by name, so there is no study that says "triangle breathing does X". What exists is research on slow breathing in general, and triangle breathing sits inside it. At nine seconds a lap the pattern runs at about six and a half breaths a minute, which falls within the under-ten-breaths-a-minute band examined in a 2018 systematic review in Frontiers in Human Neuroscience. That review (Zaccaro and colleagues, full text) narrowed 2,461 abstracts down to fifteen studies in healthy subjects, and reported: "Slow breathing techniques promote autonomic changes increasing Heart Rate Variability and Respiratory Sinus Arrhythmia…" Alongside that it recorded psychological outcomes of "increased comfort, relaxation, pleasantness, vigor and alertness, and reduced symptoms of arousal, anxiety, depression, anger, and confusion". The same authors were careful about how much weight any of that carries, calling it "interesting albeit limited evidence" and pointing at how differently those studies were designed. Note what that does and does not say: it describes changes in heart-rate variability and in how healthy people rated their own mood. It is not evidence that breathing treats a condition, and this timer does not claim to.
The picture for children is more sober still. A 2023 micro-randomised trial of 171 children aged nine to thirteen (Kramer, Neubauer and Schmiedek, Journal of Clinical Child and Adolescent Psychology 52(6), PMID 35704507) had them do a video-guided slow-paced diaphragmatic breathing exercise in ordinary daily life on each of fifteen days, against an active control video and a passive control condition. Averaged across every occasion: "The breathing exercise had no immediate effects on negative affect or relaxation compared to both control conditions." But the effect was not uniform: "in situations when children reported higher levels of worries than usual, relaxation was higher when children performed the breathing exercise compared to the passive control condition." Read the comparison carefully, because it matters: that difference was against doing nothing at all. Against the active control — simply watching a different video — the abstract is explicit: the breathing exercise “did not result in higher levels of relaxation in situations when children worried more than normally”. In plain terms: on an ordinary afternoon the exercise changed nothing the study could measure, and on a worried afternoon it beat sitting there but not a video. That is a good reason to teach triangle breathing as a tool for hard moments rather than as a daily ritual that has to produce a result — and a good reason not to promise a child that it will make them feel better.
So: a short, free, low-risk skill with a plausible physiological rationale and modest, uneven evidence. That is the accurate description, and it is enough. There is more on how these studies are put together on what the research says.
Common questions
Is triangle breathing the same as box breathing?
No. Box breathing has four sides — in, hold, out, hold — so it holds the breath twice per cycle. Triangle breathing has three sides and only one hold, at the top of the in-breath. That makes triangle the gentler of the two and the easier one to remember, and it is why triangle is usually taught first.
How long should I do triangle breathing for?
The timer here defaults to three minutes, which is about twenty laps of the triangle. Two or three minutes is enough for most of the situations this pattern suits. If you want longer than about ten minutes, a pattern without a hold is usually more comfortable to sustain.
Is triangle breathing safe for children?
For most children a three-second hold is unremarkable, and it is an easy pattern to teach because there is only one number to remember. Keep it short, keep it voluntary, and let any child who does not want to join simply sit quietly instead. A child with asthma, a heart condition, epilepsy or any breathing difficulty should have a parent or clinician say yes first.
What if three counts feels too short or too long?
Then change it. Three is a convention, not a rule. If three counts leaves you gasping, count faster or take a smaller breath in. If it feels rushed, count more slowly so the three beats stretch out. The pattern is doing its job when the whole cycle feels unforced.
Should I breathe through my nose or my mouth?
Breathe in through your nose if you can — it warms and slows the air. The out-breath can go through your nose or through slightly parted lips, whichever you notice less. If you have a cold or a blocked nose, use your mouth for both and do not make a project out of it.
Can I do triangle breathing with my eyes open, in front of people?
Yes, and that is one of the reasons it travels well. Nine seconds a lap with a soft, quiet out-breath is invisible from a metre away. You can run it in a waiting room, in a queue, in the two minutes before a meeting starts, or standing at the back of a classroom.
Related
A note on what this is
This page is a breathing timer and a plain description of a practice. Nothing here is medical care, none of it diagnoses or treats anything, and none of it replaces treatment or advice from a clinician who knows you. If breathing is hard, if you feel faint, or if something changes and stays changed, talk to a doctor. Please read the medical disclaimer.