Box breathing, also called square breathing or 4-4-4-4 breathing, is a slow breathing pattern with four equal parts: breathe in for four, hold for four, breathe out for four, hold for four. Repeat for a few minutes. It slows the breath to roughly four breaths a minute, and the rhythm gives your mind something simple and structured to hold onto.
It is used for daytime stress at least as much as for sleep, because it is easy to remember when you are rattled. Here are the steps, why the holds suit some people and not others, and how it compares with 4-7-8.
How to do box breathing
- Breathe out gently to empty the lungs, so you start from the bottom of the breath.
- Breathe in through your nose for a count of four. Let the belly rise before the chest. Keep it quiet and unforced.
- Hold for a count of four. Keep the throat soft; you are pausing, not clamping down.
- Breathe out through your nose or softly parted lips for a count of four. Aim for a smooth, even exhale that lasts the full count.
- Hold with the lungs empty for a count of four. This is the side people find hardest. If it feels like a strain, make it a count of two.
- Repeat. Picture each side of a square as you go, or simply count. Do six to ten rounds, which takes about two to three minutes.
Timing: a count of four is roughly four seconds, but keeping all four sides equal and comfortable matters more than the number. Start with three if four feels long.
What to notice: the heart rate settling after the third round, and the mind narrowing to the count. If your mind wanders, pick the square up from whichever side you were on; if you cannot remember, start a new one. Losing count is normal.
If you feel light-headed, tingly or short of breath, stop and breathe normally. This is the most common problem and it comes from over-breathing or holding too long. Shorten the holds next time, or use a pattern without them.
Why the holds help some people and not others
The holds are what make box breathing different from plain slow breathing, and they cut both ways.
Why they help. A hold is a period of doing nothing, and it forces the breath to stay slow. Counting four separate sides gives a racing mind more to attend to than a simple in-and-out, which is why many people find box breathing easier to stay with when stressed.
Why they do not help everyone. For some people a held breath is uncomfortable, and attention on it can trigger the very unease they were trying to settle. This is especially true for people prone to panic or health anxiety, for whom breath-holding can feel like breathlessness, and the empty-lung hold in particular can bring on an urge to gasp. If that sounds familiar, our guide to anxiety at night explains why, and a pattern without holds will serve you better.
A note on sleep specifically. Because the in-breath and out-breath are equal, box breathing does not lean on the long exhale, the part of slow breathing most linked with calming the nervous system. A 2018 systematic review by Zaccaro and colleagues found slow breathing at around six breaths a minute consistently associated with relaxation and lower anxiety, but box breathing itself has not been studied in the same way, and no research shows it helps people fall asleep faster. It is a reasonable way to settle before sleep, not a proven sleep technique.
In short: Box breathing gives a busy mind a clear structure and a slow pace. If holds feel calming, use it. If holds feel unsettling, drop them and use a longer out-breath instead.
Box breathing versus 4-7-8
Both are slow, counted patterns with holds, but they differ in useful ways.
- Structure. Box breathing is four equal sides, which is easiest to remember. 4-7-8 breathing is asymmetric, with a long hold and an exhale twice the length of the inhale.
- Emphasis. 4-7-8 leans hard on the long out-breath, which makes it more of a wind-down pattern. Box breathing is more neutral, which makes it useful for steadying yourself in the day without becoming drowsy.
- Holds. 4-7-8 has one long hold with full lungs. Box breathing has two shorter holds, one with empty lungs, which some people find harder.
- Evidence. Neither has much direct research. Both are convenient ways to do slow breathing, which does.
A sensible way to use them: box breathing to settle the first minutes in bed, then a four-in, six-out pattern with no holds to drift towards sleep. Our overview of breathing exercises for sleep sets out that pattern and three others.
Using box breathing in the day
Box breathing is at its best as a reset: three rounds before a difficult conversation, in the car before an interview, or at the desk when a message has landed badly. It is also useful on the evening before something important, when adrenaline rather than sleepiness is running the show; our guide on sleeping before a big day covers that night. Practising in the day also makes it work faster at night, because the body learns the rhythm.
Cautions
- Never strain. Shorten any count that feels effortful. A hold of two is fine.
- Stop if you feel dizzy or tingly, and breathe normally until it passes.
- If you are pregnant, have a heart or lung condition, or have been told to avoid breath-holding, check with a GP or midwife before adding holds. Slow breathing without holds is generally fine.
- Do not use it to fight sleep. If you are calm after ten rounds but wide awake, that is not a reason for twenty more. Let the count go.
Where to go next
Tonight: out to empty, in for four, hold four, out four, hold four. Six rounds. Then drop the holds and let the out-breath lengthen on its own. If breathing settles you but does not send you off, the Relaxation hub compares the methods that work on body and mind.
Sources and further reading
Written and reviewed by the Quiet Mind Sleep editorial team in line with our editorial policy. Spotted an error? Let us know.
