Slow box 5-5-5-5

How to do it

1. Pick a firm chair or lie on your back. Plant your feet, lengthen your spine, and rest your hands on your thighs or your belly.
2. Take two or three ordinary breaths through your nose, and let the last one go without emptying all the way.
3. Breathe in through your nose for 5 seconds, slowly from the very first second. If you're full by 3, you're going too fast: spread the air out.
4. Hold full for 5 seconds. Your ribs stay open and your throat stays unlocked.
5. Breathe out through your nose for 5 seconds, in one even thread that runs out right as the count does.
6. Hold empty for 5 seconds. Stay still, with your belly soft. If you need to breathe in sooner, breathe in.
7. That's one 20-second round. Keep going for 5 minutes, which is 15 rounds.
8. When you're done, go back to your everyday breathing for a minute before you stand up.

What the slow box is

It's the same square as 4-4-4-4 breathing with one more second on each side. That sounds minor, but the round goes from 16 to 20 seconds and the pace drops to three breaths a minute. At rest, an adult typically takes 12 to 18 breaths a minute, according to Cleveland Clinic.

That extra second changes the practice. You have to breathe in more slowly so you don't top off early, and the hold on empty, already the hard side, becomes the heart of the exercise. So this isn't the box to start with. It's the one that comes next.

Where it comes from

It doesn't have a history of its own. It's one step within a family: equal-phase breathing, which yoga calls sama vritti and which most people now know as box breathing thanks to Mark Divine, the former Navy SEAL who spread it. In the piece Divine wrote for TIME in 2016, the only count that appears is four.

In the tradition, the number isn't fixed: what defines the practice is that the phases match, and you choose the count. The 2023 Stanford trial did something similar. It gave each participant sides of 3 to 4, 5 to 6 or 8 to 10 seconds, depending on how long they could stretch one exhale in a test beforehand. So the five-second version is a familiar middle setting, not a recent invention with an author.

What people use it for

People who choose it are usually after a deeper stretch of concentration than the classic box gives: before studying, writing, training, or a long task that needs a quiet head. Twenty seconds a round leaves very little room to drift.

It also works as a stepping stone. If you're thinking about trying patterns with longer holds, 5-5-5-5 shows you how you get along with the empty hold without asking too much. It's not the best pick for a moment of high tension: when your body is already revved up, five seconds on empty can feel long.

What the studies say

There are no trials of the exact 5-5-5-5 pattern. The closest thing is the Stanford study published in 2023, with 108 people, in which a group of 21 did box breathing five minutes a day for 28 days. Some of that group used 5- or 6-second sides. Their mood improved, with no significant difference from mindfulness meditation, and there were no changes in resting heart rate or sleep.

There's more data on slow breathing in general. A 2018 review pulled together 15 studies of techniques below ten breaths a minute and found associations with higher heart rate variability and with feeling more relaxed. Nearly all of them looked at paces near six a minute, without holds, and none was a randomized controlled trial.

There's criticism, too. A 2024 paper on police training points out that counting phases takes up attention and that breath holds can limit gas exchange. In short, the evidence is limited.

What it feels like and what to notice

You'll notice the change on the fourth side. Around the third or fourth second on empty, a small urge to breathe in may show up. It's a normal signal from your body, not an alarm, and it passes as soon as the air comes in.

What you want is for that urge to stay mild and for the next inhale to come out calm. If you have to gulp air, if you get dizzy, your hands tingle, or you feel distressed, five is too big for today. Go back to four.

Variations

• Easier (4-4-4-4 variation): classic box breathing. It's the starting point.
• In-between step (5-5-5-3 variation): keep the empty hold at 3 seconds and add a second each week.
• Without the empty hold (5-5-5 variation): in for 5, hold 5, out for 5, with no fourth side.
• Longer (6-6-6-6 variation): only once five feels easy for the full 5 minutes.
• Traditional: in sama vritti there's no set number. You choose the count and keep the phases equal.

Common mistakes

• Jumping from 4 to 5 too soon. Get 4-4-4-4 complete and comfortable first, over several days.
• Filling up in the first two seconds. Then the inhale turns into another hold. Spread the air over all five.
• Forcing yourself empty. If you squeeze the air out, the empty hold starts with air hunger. Breathe out only as far as it goes by itself.
• Holding with a tense body. Neck, jaw and belly stay loose through both holds.
• Recovering with a gasp. If you need one, the sides are too long for today.
• Stretching the session out of pride. Fifteen clean rounds beat thirty that you fought for.

How often and how long

One 5-minute session, once a day, is plenty. Many people save it for two or three days a week and use 4-4-4-4 the rest of the time.

A simple test for whether this is your pace yet: you finish all 15 rounds without having breathed in early once, and you feel like you could keep going. If you're not there, there's no rush. Adding a second isn't a goal in itself.

Before you start

• Do it sitting or lying down, never in water or while driving.
• If you feel dizzy, tingly, short of breath, or your heart is pounding, stop and breathe normally.
• Check with your care provider first if you're pregnant or have a heart, lung or blood pressure condition, epilepsy, or a history of fainting or panic attacks.
• This is a practice for adults who already know the 4-4-4-4 box. Don't force the hold on empty.