---
title: "Box Breathing: How to Do It, How Long, Does It Work"
description: "Box breathing means breathe in for 4, hold for 4, breathe out for 4, hold for 4. One round takes 16 seconds; start with 4 rounds, then build to 5 minutes."
url: https://shimmr.app/learn/box-breathing/
---

- [Learn](https://shimmr.app/learn/)

- [Relaxation](https://shimmr.app/learn/relaxation/)

# Box breathing: how to do it, how long and whether it works

Box breathing means breathe in for 4, hold for 4, breathe out for 4, hold for 4. One round takes 16 seconds; start with 4 rounds, then build to 5 minutes.

The Shimmr team

Published Oct 31, 2026

4 min read

- **How to do it:** breathe in through your nose for 4 seconds, hold for 4, breathe out for 4, then hold for 4 again, like tracing the four sides of a square.
- **How long:** one round takes 16 seconds; start with 4 rounds, about a minute, and build up to 5 minutes a day if you like it.
- **Does it work:** a 2026 review of randomised trials found short-term benefits for stress, anxiety and mood, but the studies are few and their effects on heart rate variability are mixed.
- **For anxiety:** in a 2026 pilot study of 47 students, one minute of box breathing in a stressful moment lowered anxiety more than doing nothing.
- **Safety:** if the holds make you dizzy, shorten them or skip them; if you are pregnant or have a heart or lung condition, keep holds short and ask your doctor.

Hear it

Box breathing is a simple breathing pattern with four equal parts: breathe in for 4 seconds, hold for 4, breathe out for 4, hold for 4. It is also called square breathing, because each part is one side of a square. One round takes 16 seconds, and a few rounds can help you feel steadier before a meeting, after bad news or in bed. Here is how to do it, how long to practise and what the research shows.

## How do you do box breathing?

Breathe in, hold, breathe out and hold, each for the same count of 4. Sit up straight with your feet on the floor, or lie on your back, and follow these steps:

1. Breathe out slowly until your lungs feel empty.
2. Breathe in quietly through your nose while you count to 4.
3. Hold your breath while you count to 4. Keep your shoulders and jaw soft.
4. Breathe out through your nose or mouth while you count to 4.
5. Hold again, with empty lungs, while you count to 4.
6. That is one round. Repeat it 3 more times.

Some people picture a square and trace one side with each count. If 4 feels too long, use 3. If it feels easy, try 5. The equal parts matter more than the exact number. At a count of 4, you take less than 4 breaths a minute, compared with the 12 to 20 of normal breathing at rest.

## How long should you do box breathing?

Start with 4 rounds, which is just over one minute. That is enough to feel the effect and short enough to fit anywhere. Once the pattern feels natural, you can build up to 5 minutes a day.

| When | How much | Time |
| --- | --- | --- |
| First week | 4 rounds | About 1 min |
| Daily practice | About 19 rounds | 5 min |
| A stressful moment | 4 rounds | About 1 min |

Five minutes is also what researchers used in a [2023 randomised study](https://doi.org/10.1016/j.xcrm.2022.100895): people did a 5 minute breathing exercise every day for a month, and box breathing was one of the three exercises. Overall, the breathing groups improved their mood more than a group that did mindfulness meditation, with the clearest gains from cyclic sighing, a pattern with long out breaths. The study did not show that box breathing on its own beat meditation.

## Does box breathing really work?

It seems to help in the short term, but the evidence is still thin. A [2026 systematic review](https://doi.org/10.1007/s10484-026-09812-7) looked only at randomised trials of box breathing. It found short-term benefits for perceived stress, anxiety and mood in several studies. Effects on the body were mixed: some studies saw slower breathing, others saw changes in heart rate or heart rate variability (how much the gap between heartbeats changes), and some measures did not move at all. The authors called the evidence limited and fragmented, with few studies, different methods and little long-term follow-up.

Box breathing is often linked to the US Navy SEALs, because a former SEAL commander made it popular in his books. That story explains why it is famous. It is not proof that it works.

## Is box breathing good for anxiety?

It can take the edge off anxiety in the moment. In a [2026 pilot study](https://doi.org/10.1080/10615806.2026.2659809), 47 university students did one minute of box breathing, one minute of cyclic sighing, or nothing when they felt under threat in daily life. Five minutes later, both breathing groups had a bigger drop in anxiety than the group that did nothing. Students also made fewer errors on an attention test after box breathing, though their reactions were a little slower.

That is a small study, so treat it as a promising sign. If anxiety is part of daily life for you, our guide to [binaural beats for anxiety](https://shimmr.app/learn/binaural-beats-for-anxiety/) covers another gentle aid. If anxiety or panic attacks get in the way of work, sleep or relationships, talk to a doctor.

## Box breathing or 4-7-8 breathing: which should you use?

Use box breathing when you want to feel steady and alert, and [4-7-8 breathing](https://shimmr.app/learn/4-7-8-breathing/) when you want to wind down. Box breathing has four equal parts. 4-7-8 makes the out breath twice as long as the in breath, which leans more toward rest. A third option is [coherent breathing](https://shimmr.app/learn/coherent-breathing/): about 6 slow breaths a minute with no holds at all, which suits people who find holding the breath uncomfortable.

| Technique | Pattern | Holds |
| --- | --- | --- |
| Box breathing | 4 in, 4 hold, 4 out, 4 hold | Two |
| 4-7-8 breathing | 4 in, 7 hold, 8 out | One |
| Coherent breathing | 5 in, 5 out | None |

## Is box breathing safe, and does it help you sleep?

For most healthy people it is safe. Feeling light-headed or short of air during the holds is common at first. If that happens, stop, breathe normally, and next time use a shorter count or skip the holds. If you are pregnant or have a heart or lung condition, keep the holds short and ask your doctor first. Never practise while driving.

There is little research on box breathing and sleep. In bed, a few rounds give your mind a simple task and slow your breathing, which can help you settle. A slow, steady sound can help too. In Shimmr, Journeys guide you through weight, breath and sound, and the Busy → Quiet Shift glides from Beta toward Alpha over 10 to 20 minutes. Shimmr does not count your breaths for you, so keep your own count and let the sound hold the space.

In the app

Busy → Quiet · 10 to 20 min

Do four rounds of box breathing, then let this Shift glide from Beta down to Alpha while your breathing settles.

## Common questions

**How do you do box breathing?**

Breathe in through your nose for 4 seconds, hold for 4, breathe out for 4 and hold for 4. That is one round; repeat it 4 times to start.

**How long should you do box breathing?**

Start with 4 rounds, which is about one minute. Once it feels easy, 5 minutes a day is a good goal, and one minute is enough in a stressful moment.

**Does box breathing really work for anxiety?**

Small studies suggest it eases anxiety in the moment, including a 2026 pilot where one minute helped students more than doing nothing. Larger, longer trials are still missing, so see it as a quick tool, not a treatment.

**Is box breathing good for sleep?**

It can help you settle in bed, because slow breathing and counting quiet the body and mind. There is little research on box breathing and sleep, and some people find a longer out breath, as in 4-7-8 breathing, easier at night.

**Box breathing or 4-7-8 breathing: which is better?**

Neither is clearly better. Box breathing uses four equal parts and suits a busy day, while 4-7-8 makes the out breath twice as long as the in breath, which many people prefer at bedtime.

Keep reading

- [Relaxation 4-7-8 breathing: how to do it, how often, and what the evidence says](https://shimmr.app/learn/4-7-8-breathing/)

- [Relaxation Coherent breathing: 6 breaths a minute and what it does](https://shimmr.app/learn/coherent-breathing/)

- [Relaxation Binaural beats for anxiety: what helps, which frequency, how long](https://shimmr.app/learn/binaural-beats-for-anxiety/)

This article is for general information and is not medical advice. Binaural beats are not a treatment for insomnia or any other condition.