Luleep guide
Box breathing: the 4-4-4-4 technique, step by step
Updated · Written by the Luleep team, based on the sources listed below.
Box breathing (also called square breathing) has four equal steps: breathe in for 4 seconds, hold for 4, breathe out for 4, hold for 4 — like tracing the sides of a square. One round takes 16 seconds. It is simple to remember, easy to count in the dark, and a calm way to slow down before sleep or after a stressful day.
What is box breathing?
Box breathing is a slow, even breathing pattern with a pause after each breath in and each breath out. It is widely taught for staying calm under pressure — the Cleveland Clinic notes that US Navy SEALs use it, and so do many people dealing with everyday stress [1]. Its strength is simplicity: four equal counts, no ratios to remember.
How to do box breathing, step by step
- Get comfortable, sitting up or lying on your back, and let your shoulders drop.
- Breathe out gently until your lungs feel empty.
- Breathe in for 4 through your nose — side one of the square.
- Hold for 4 with your lungs full, without tensing — side two.
- Breathe out for 4, slowly and evenly — side three.
- Hold for 4 with your lungs empty — side four.
- Repeat for a few rounds; three to four is a good start, a few minutes once it feels easy [1].
| Side | Seconds | Lungs |
|---|---|---|
| Breathe in | 4 | Filling |
| Hold | 4 | Full |
| Breathe out | 4 | Emptying |
| Hold | 4 | Empty |
| Total | 16 | About 3.75 breaths a minute |
Picture a square, or trace one with your finger on the duvet. If four seconds feels too long, use three; if it feels easy, you can try five — keep all four sides equal.
Box breathing at bedtime
Because every side is equal, box breathing feels steady rather than sleepy, which is why many people use it during the day. At bedtime it works well as a first step: a few rounds to settle a busy mind, then let your breathing go back to normal — or move on to a technique with a longer breath out, such as 4-7-8 breathing. Dim the lights first and, if you like, play a quiet sleep sound.
What the research says
In a 2023 randomised study, box breathing was one of three daily five-minute breathing practices compared with mindfulness meditation over a month. Breathing practice overall improved mood, with the exhale-focused technique showing the clearest benefit [2]. More broadly, slowing your breathing is linked with calmer physiology and mood [3]. Box breathing is a relaxation tool, not a treatment for anxiety or sleep problems.
Keep the holds soft
Never strain. If you feel light-headed or short of breath, shorten the holds or drop them, and return to normal breathing. If you have a heart or lung condition or are pregnant, ask your doctor before practising breath-holds.
Box breathing, triangle breathing and 4-7-8
- Box (4-4-4-4): four equal sides; steady and easy to count.
- Triangle (4-4-4): the same without the hold after breathing out — a little easier if empty-lung pauses feel uncomfortable.
- 4-7-8: slower, with a long breath out; often chosen right before sleep.
All ten techniques are compared in our breathing exercises guide.
Questions and answers
How long should you do box breathing?
Start with three or four rounds, about one minute. Once it feels easy, a few minutes is plenty.
Is box breathing good for sleep?
It can help you settle a busy mind before bed. Some people then switch to a technique with a longer breath out, such as 4-7-8, to wind down further.
What is the difference between box breathing and 4-7-8?
Box breathing uses four equal counts of 4 (in, hold, out, hold). 4-7-8 breathes in for 4, holds for 7 and breathes out for 8, so it is slower and puts more weight on the breath out.
Sources
- Cleveland Clinic. Box breathing benefits and techniques.
- Balban MY et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine, 2023.
- Zaccaro A et al. How breath-control can change your life: a systematic review on psycho-physiological correlates of slow breathing. Frontiers in Human Neuroscience, 2018.
This guide is general information, not medical advice. Luleep is for relaxation and is not a medical device. If you have ongoing trouble sleeping, or are worried about your health, talk to a doctor.