Box breathing or cyclic sighing: which should you use?
Use box breathing to settle before something: a meeting, a block of work, a hard conversation. Use cyclic sighing to come down after something, or when you want the quickest drop in breathing rate. The one trial that compared them daily for a month found the sigh improved mood and lowered breathing rate more, which is why the timer above runs the sigh. If you have any reason to avoid breath-holds, the choice is made for you: the sigh has none.
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The two patterns look nothing alike. Box breathing is four equal counts, in, hold, out, hold, a sixteen-second square at four breaths a minute. Cyclic sighing is a breath in, a second small sip on top, and one long release through the mouth, nine seconds a cycle at about seven a minute. The box is even and boring on purpose; the sigh is lopsided on purpose, with two thirds of every cycle spent breathing out.
That asymmetry is the whole argument. A slow exhale is the part of breathing that slows the heart. The box gives you four seconds of it in every sixteen; the sigh gives you six in every nine. The holds in the box do something too, which is to hand the mind a job and slow the whole cycle down, and for the wait before a demanding task that job is useful. For coming down afterwards, the exhale does more of the work, and the sigh has more exhale.
Side by side
| Box breathing | Cyclic sighing | |
|---|---|---|
| The shape | In 4 · hold 4 · out 4 · hold 4 | In 2 · sip 1 · out 6 |
| One breath | 16 seconds, about 4 a minute | 9 seconds, about 7 a minute |
| Time spent exhaling | A quarter of each round | Two thirds of each cycle |
| Breath-holds | Two per round, one full and one empty | None |
| People use it | Before something demanding; to settle and focus | After something stressful; to come down fast |
| Looks like, from across a room | Nothing | A slow sigh, unless you let the air out through narrow lips |
| Who should be careful | Anyone on the hold caution list: pregnancy, heart or blood-pressure conditions, epilepsy, lung conditions, recent surgery, glaucoma, panic disorder | The ordinary cautions for any slow breathing |
| In the one head-to-head trial | Improved mood, less than the sigh | Improved mood and lowered breathing rate most of the three patterns |
How to try both in five minutes
The timer above runs cyclic sighing. The box page runs the square. To compare them honestly, do this on a calm day, not a bad one.
- Sit, breathe out, note how you feel. Not in words; just a sense of how fast the breath is and how busy the head is.
- Two minutes of box breathing. In through the nose for four, hold for four with the throat open, out for four, hold empty for four. Eight rounds. Keep the breaths small; the holds should be quiet, not braced.
- A minute of ordinary breathing. Notice what changed. Most people report a steadier head and a slower breath, and some report that the holds made them slightly tense.
- Two minutes of cyclic sighing. In through the nose for two, a small second sip for one, then a long exhale through the mouth for six. About thirteen cycles. Make the sip small and the exhale slow rather than forced.
- Compare. The honest answer is personal: some people find the sigh releases more and the box focuses more, which is roughly what the two shapes are built for. Keep the one that gave you what you needed, or keep both for different moments.
Pick this if
Pick box breathing if you are about to do something that needs a steady head: a presentation, an exam, a block of concentrated work. The even counts and the holds give the mind one job, and the two-minute version on the focus page is the one to use at a desk. Pick it too if the sigh's long open-mouth exhale is impractical where you are.
Pick cyclic sighing if you want to come down from something, if you want the fastest drop in breathing rate, if you are building a daily five-minute habit, or if you have any reason to avoid holding your breath. It is the pattern on the work stress page for exactly these reasons.
Pick neither if what you feel is a panic attack or a crisis. The panic page uses a hold-free pattern, starts within half a minute, and puts the helplines first.
Before you hold your breath
The difference in safety between the two patterns is the holds. Cyclic sighing has none. Box breathing holds twice a round, and you should skip the holds, or talk to your doctor before using them, if any of these apply:
- Pregnancy.
- A cardiovascular condition, or high blood pressure that is not well controlled.
- Epilepsy or any seizure disorder.
- A respiratory condition such as asthma or COPD, especially during a flare-up.
- Recent surgery, particularly abdominal, chest or eye surgery.
- Glaucoma or raised pressure in the eye.
- Panic disorder or a history of panic attacks: a held breath can feel like the start of one.
For either pattern, stop and breathe normally if you feel dizzy, light-headed or tingly, and take smaller breaths rather than bigger ones. Nothing here treats stress, anxiety or any condition.
What the evidence shows
These two patterns have been compared directly once. In a 2023 paper in Cell Reports Medicine, Balban and colleagues at Stanford ran "a remote, randomized, controlled study (NCT05304000) of three different daily 5-min breathwork exercises compared with an equivalent period of mindfulness meditation over 1 month". The three were "(1) cyclic sighing, which emphasizes prolonged exhalations; (2) box breathing, which is equal duration of inhalations, breath retentions, and exhalations; and (3) cyclic hyperventilation with retention". The primary endpoints were "improvement in mood and anxiety as well as reduced physiological arousal (respiratory rate, heart rate, and heart rate variability)".
The result that this page rests on: "breathwork, especially the exhale-focused cyclic sighing, produces greater improvement in mood (p < 0.05) and reduction in respiratory rate (p < 0.05) compared with mindfulness meditation." The authors' summary is that "Daily 5-min cyclic sighing has promise as an effective stress management exercise." Box breathing improved mood too, by less.
The limits, in the authors' own words: the study "was originally intended as an exploratory study in preparation for a larger clinical trial and thus was not pre-registered", and "The remote nature of the study limited the monitoring of how closely participants followed the instructions on a daily basis." It was about a hundred adults at home. It tested a daily habit over a month, not a single session before a task, which is the situation most people use box breathing for and which nobody has compared. So the trial favours the sigh for the daily habit and says nothing about the pre-meeting square. That is why this page gives each pattern its own job.
Common questions
Which is better, box breathing or cyclic sighing?
For improving mood over a month of daily five-minute practice, cyclic sighing came out ahead in the one trial that compared them, and it also lowered breathing rate more. For steadying yourself before a task, box breathing is the one most people reach for, and the trial did not test that. Use the sigh to come down and the square to settle in.
Which one is safer?
Cyclic sighing. It has no breath-holds, so the list of people who should be careful is short. Box breathing holds the breath twice a round, and its page lists pregnancy, cardiovascular conditions, epilepsy, respiratory conditions, recent surgery, glaucoma and panic disorder as reasons to skip the holds or ask a doctor first.
Can I do both?
Yes, and many people do: the square before something that needs concentration, the sigh after something that rattled them. They do not conflict. If you only want one habit, the trial's result and the shorter caution list both point to cyclic sighing.
How long should a session be?
Five minutes is what the trial used for both, once a day, for a month. For a quick reset, a minute of either is still something: four rounds of the box, six or seven cycles of the sigh.
Why does the exhale matter so much?
A long, slow exhale is the part of a breath that slows the heart, and cyclic sighing is built almost entirely out of it: nine seconds a breath, six of them breathing out. Box breathing spends only a quarter of each round on the exhale, which is one plausible reason the sigh did better at lowering breathing rate.
Did the trial prove cyclic sighing works?
It found it worked better than meditation and better than box breathing for mood and breathing rate, in about a hundred adults at home over one month. It was not pre-registered, adherence was self-reported, and the authors call it exploratory. That is a good reason to try it and not a proof.
A note on what this is
Nothing on this page is medical care, and none of it replaces treatment or a conversation with your doctor. Read the medical disclaimer. Stress or anxiety that is shaping your days is a reason to talk to a clinician, not a reason to pick a better breathing pattern.