Box breathing (4-4-4-4): a calm, even breath in four counts

What box breathing is

Box breathing is a slow breathing pattern in four equal parts: breathe in for a count of four, hold for four, breathe out for four, and hold again for four. Picture going round the sides of a square, one side for each part. It is also called square breathing or 4×4 breathing, and in yoga it is known as sama vritti pranayama.

At a count of one per second, a full box takes 16 seconds, which works out at fewer than four breaths a minute. That is far slower than most people breathe at rest, but the holds do the slowing for you. You don't have to stretch each breath; you just wait at the top and at the bottom.

How to do it

Sit somewhere you can stay still for a few minutes, with your back supported and your feet on the floor. Then:

1. 1Breathe out slowly until your lungs feel empty.
2. 2Breathe in gently through your nose for a count of four.
3. 3Hold for a count of four, keeping your shoulders and jaw soft.
4. 4Breathe out for a count of four, smoothly rather than all at once.
5. 5Hold with your lungs empty for a count of four.
6. 6Repeat. Cleveland Clinic suggests three or four rounds to begin with.

Getting the count right

If four counts feels like a strain, shrink the box to three counts a side and build up from there. What matters is that the four sides stay equal and the breath stays gentle. Cleveland Clinic's advice is to stay at your comfort level, breathing very gently and without straining. This is a breath you should be able to keep up for minutes, not a breath-holding contest.

Counting in your head works, but it drifts. It is easy to speed up without noticing, especially when you are tense, which is exactly when you are most likely to reach for the exercise. A steady outside count, from a clock with a second hand or a timer that calls each side, keeps the box square.

Who uses it

Box breathing owes some of its fame to who is said to use it. Cleveland Clinic describes it as a form of yogic deep breathing “employed by the United States Navy SEALs and by stressed-out people everywhere.” It is often suggested as a way to steady yourself before something stressful, like a presentation, an exam or a difficult conversation.

Most people who use it are not soldiers. It is simple enough to do at a desk, on a train or in a waiting room, nobody can tell you are doing it, and a few rounds take a minute or two. That is most of its appeal.

What the research says

Breathing exercises in general have been studied much more than this particular count. In one of the more careful recent studies, published in Cell Reports Medicine in 2023, Stanford researchers asked volunteers to spend five minutes a day for a month on box breathing, on one of two other breathing exercises, or on mindfulness meditation. The breathing exercises as a group improved mood more than meditation did, and the one that did best was not box breathing but cyclic sighing, which puts the emphasis on a long exhale.

That is one study, run remotely with volunteers, so treat it as a reason to try box breathing rather than proof of what it will do for you. If you find the holds uncomfortable, a slow breath with a long exhale and no holds at all is a perfectly good alternative.

When to use it

There is no wrong time, but it suits a few moments especially well:

• Before something you are nervous about, to settle your breathing first.
• Between tasks, as a two-minute reset before the next block of work.
• When you catch yourself breathing fast and shallow at your desk.
• In bed, if counting helps you stop replaying the day.

When to stop

Box breathing should feel easy. If you feel dizzy, light-headed, tingly or short of breath, stop and breathe normally, and next time shorten the holds or leave them out. Don't practise it while driving, or anywhere you need your full attention.

It is a way to calm down, not a treatment. If you have a heart or lung condition, or if anxiety or panic attacks are affecting your daily life, talk to a doctor. A breathing exercise is not a substitute for medical care.

Using the Box Breathing timer

The Box Breathing timer keeps the count for you: 20 seconds to settle, then twelve rounds of four counts in, hold, out and hold, then half a minute of free breathing, about four minutes in all. A calm voice calls each side of the box, so you can close your eyes and follow it.

Twelve rounds is more than the three or four Cleveland Clinic suggests to begin with, so stop whenever you have had enough. For a gentler option with no holds, the Double Inhale Sigh is two breaths in through the nose and one long sigh out, repeated for about two and a half minutes.