Box Breathing: How to Do It, With a Visual Timer and 3 More Techniques

Box breathing (also called square breathing or four-square breathing) is a four-step breathing pattern with four equal sides: breathe in for 4 seconds, hold for 4, breathe out for 4, and hold again for 4. Because every phase is the same length, it's easy to remember under pressure, which is exactly when you need it.

Use the timer below to try it right now. Further down you'll find a step-by-step guide, the mistakes that trip most people up, what the research does and doesn't show, and three other techniques worth knowing: 4-7-8 breathing, belly breathing and resonance breathing.

What is box breathing?

Picture a square. You travel up one side as you breathe in, across the top as you hold, down the other side as you breathe out, and along the bottom as you hold with empty lungs. Four sides, four counts each. A full round takes 16 seconds, so you're breathing about four times a minute, much slower than the 12 to 20 breaths a minute most adults take at rest.

You'll often see it called Navy SEAL breathing, because it's widely associated with military and first-responder training. The appeal is practical: there's nothing to remember except the number 4, you can do it with your eyes open, and nobody around you will notice.

How to do box breathing, step by step

1. 1

   Get set

   Sit up with your back supported and both feet flat on the floor. Drop your shoulders. You can close your eyes or keep them on the timer.

2. 2

   Empty your lungs

   Breathe out slowly through your mouth until your lungs feel comfortably empty. This is your starting point.

3. 3

   Breathe in for 4

   Breathe in quietly through your nose for a count of four, letting your belly expand rather than your chest and shoulders.

4. 4

   Hold for 4

   Pause with the air in for a count of four. Keep it soft: no clenching your jaw, no bearing down.

5. 5

   Breathe out for 4

   Let the air out for a count of four, through your nose or through slightly parted lips.

6. 6

   Hold empty for 4, then repeat

   Pause again for four before the next breath. That's one round. Start with 4 to 6 rounds and work up to 5 minutes once it feels easy.

How long should you go? In the 2023 Stanford trial that tested box breathing, people practiced for 5 minutes a day. The NHS suggests its own calming breathing exercise for at least 5 minutes and notes you'll get the most out of it if you make it part of your daily routine. Two minutes before a stressful moment is still worth doing.

Common mistakes

• Gulping air. Filling your lungs to the max tightens your neck and can make you lightheaded. A comfortable, full breath is enough.
• Straining during the holds. The holds are pauses, not a test. If your throat clamps shut or your face tenses, shorten them to 2 or 3 counts.
• Rushing the count. If your four seconds keep shrinking, use the timer or the finger trick until the pace sticks.
• Only trying it mid-panic. It's hard to learn a new skill when your heart is pounding. Practice when you're calm so it's ready when you're not.
• Breathing with your shoulders. If your shoulders rise on every inhale, put a hand on your belly and aim the breath there.

Box breathing benefits: what the research actually shows

Slow, controlled breathing is one of the most studied relaxation tools out there, but the evidence is more modest than social media makes it sound. Here's an honest read:

• Mood, five minutes a day. In a randomized Stanford trial published in 2023, box breathing was one of three 5-minute daily breathing practices compared with mindfulness meditation over a month. The breathing groups saw a bigger lift in positive mood than the meditation group, and the exhale-focused cyclic sigh came out on top.
• Stress. A 2023 meta-analysis in Scientific Reports pooled 12 randomized trials and found that breathwork lowered self-reported stress compared with control conditions. The effect was small to moderate, and the authors explicitly warn against letting hype outrun the evidence.
• Slow breathing in general. A 2018 systematic review of techniques under 10 breaths a minute in healthy people linked them to higher heart rate variability, more relaxation and less arousal. Box breathing, at about four breaths a minute, falls well inside that range.

What the research doesn't show: that box breathing cures anxiety, insomnia or high blood pressure. Think of it as a way to take your foot off the gas, not as a substitute for treatment.

Box breathing vs. 4-7-8, belly breathing and resonance breathing

All four techniques in the timer are built on belly breathing. What changes is the rhythm and whether you pause with your lungs full or empty.

4-7-8 breathing

Popularized by Dr. Andrew Weil and adapted from yogic pranayama, 4-7-8 breathing has you breathe in through your nose for 4, hold for 7, and breathe out through your mouth for 8 with a soft whoosh. According to the Andrew Weil Center for Integrative Medicine's handout, the ratio matters more than the exact seconds, so count faster if the hold is too long. The same handout recommends doing it at least twice a day and sticking to four breaths at a time for the first month.

Research on it is thin. In a 2022 study of 43 young adults, three sets of six 4-7-8 cycles lowered heart rate and systolic blood pressure right afterward. That's a short-term effect in a small group, so treat it as a promising sign, not proof.

Belly breathing (diaphragmatic breathing)

When you breathe in, your diaphragm contracts and moves down, which lets your lungs expand and pushes your belly out. Harvard Health notes that stress and habits like sucking in your stomach nudge many adults toward shallow chest breathing, and suggests practicing belly breathing for 5 to 10 minutes several times a day. To check yourself, lie down and rest a light book on your belly: it should rise as you breathe in and fall as you breathe out.

Resonance breathing (6 breaths a minute)

Breathing about six times a minute, 5 seconds in and 5 seconds out, lines your heart rhythm up with your breath. In their review of heart rate variability biofeedback, Paul Lehrer and Richard Gevirtz note that most studies find the biggest effects at roughly 0.1 Hz, or six breaths a minute. In France it's known as cardiac coherence and practiced with the 365 rule: 3 times a day, 6 breaths a minute, 5 minutes each.

Bonus: the cyclic sigh

This was the standout in the Stanford trial: two inhales through the nose back to back (the second one short, to top off the lungs), then a long, slow exhale through the mouth. It isn't in the timer because of the double inhale, but you can do it at your own pace for a minute or two.

Which technique to use when

• Right before a high-stakes moment (a presentation, a job interview, a hard phone call): box breathing, 6 rounds. Eyes open is fine.
• To fall asleep: 4-7-8 in bed with the lights off. If the hold is too much, switch to belly breathing with a long exhale (4-6 or 4-8).
• As a daily habit: resonance breathing for 5 minutes when you wake up, before lunch and in the late afternoon.
• After an argument or bad news: slow belly breathing. Focus on making the exhale long; the exact count doesn't matter.
• If you've never done any of this: belly breathing lying down, 2 minutes a day for a week. Everything else gets easier after that.

A 7-day plan to make it stick

A technique you've only read about won't show up when you need it. This short plan builds it into your week, one exercise a day:

1. Day 1: belly breathing lying down, 12 rounds with the timer. Just notice which hand moves: chest or belly.
2. Day 2: box breathing, 4 rounds in the morning and 4 at night.
3. Day 3: box breathing before one specific moment: a meeting, your commute, the email you've been avoiding.
4. Day 4: box breathing without the timer, using the finger trick.
5. Day 5: 4-7-8 in bed, 4 rounds.
6. Day 6: resonance breathing, 5 minutes without interruptions.
7. Day 7: pick your favorite technique and two fixed times a day to do it. That's your routine.

If you'd rather have someone walk you through it, this free 7-day challenge on Duer gives you a small task every day, short guided sessions with Mike Maher and a streak to keep. Box breathing comes in on day 2.

Practice with a guided video

If a voice is easier to follow than a circle, these videos from creators on Duer guide the techniques on this page.

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@TAKEADEEPBREATH ↗

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@TAKEADEEPBREATH ↗

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@BreatheWithSandy ↗

Box breathing FAQ