4-7-8 breathing (the relaxing breath)

How do you do 4-7-8 breathing?

Sit with your back straight while you learn it. At bedtime, lie on your back or your side. Rest the tip of your tongue on the ridge of skin just behind your top front teeth, and keep it there the whole time.

In 4sHold 7sOut 8s

The tongue position and the “whoosh” come from Dr Weil’s own instructions. Neither is essential. If the sound feels too loud in a shared room, breathe out through your nose and keep the count.

How does 4-7-8 breathing work?

Mostly by slowing you right down. At 19 seconds a round, you’re breathing a little over 3 times a minute: slower even than the 4 to 10 that researchers call slow breathing (Russo et al. 2017), and far from the usual 12 to 20 at rest. Your heart speeds up slightly as you breathe in and slows as you breathe out, so a long out-breath gives the slowing side more time. The counting helps too: it’s hard to rehearse tomorrow’s meeting while you’re keeping track of seven.

The hold is the least understood part. In one small pilot, adding a 4-second hold to a slow breath lowered cortisol, the main stress hormone, more than the same breath without it. It also lowered one measure of heart rate variability, and neither version changed how calm people felt (Byrne et al. 2026). So the hold may be doing something, but nobody can yet say it’s the part that helps.

How many rounds of 4-7-8 should you do?

Four. In his patient handout, Dr Weil suggests doing it at least twice a day, with no more than four breaths at a time for the first month and up to eight later if you wish. Four rounds take just over a minute, which is part of the appeal: it’s short enough to do every night.

What matters more than the seconds is the shape: a long hold and an even longer out-breath. Weil’s own advice is that the ratio counts, not the exact time, so if 7 seconds feels hard, count faster and keep the proportions. Or shorten the hold and keep the long out-breath.

The quicker 2-3.5-4 count keeps Weil’s ratio. 4-4-8 shortens the hold, and 4-8 drops it, which is the gentlest way to keep a long out-breath. There’s more on counts like these in breathing patterns by number.

How long does 4-7-8 take to help you fall asleep?

There’s no honest number. You’ll see “asleep in 60 seconds” on a lot of pages, but we found no study that has timed how fast 4-7-8 puts people to sleep. The military sleep method makes a similar promise, and gets the same honest look. What it can do is slow you down and give a busy head something simple to follow, which is a better place to fall asleep from.

At bedtime, four rounds is a good start. Then either let your breathing go and rest, or carry on for a few minutes with a gentler breath without holds, like 4-6 breathing. This one plays here with the lights low:

When it’s thoughts rather than breath that keep you awake, racing thoughts at night has a breath for that, and breathing exercises for sleep puts four bedtime breaths side by side.

Does 4-7-8 breathing really work?

4-7-8 is far more popular than it is studied. In one study, 43 young adults did three sets of six 4-7-8 cycles, and their heart rate and systolic blood pressure fell afterwards (Vierra et al. 2022). There was no comparison group, so some of that may simply be from sitting quietly.

In a lab comparison of 84 students, breathing at 6 breaths a minute raised heart rate variability (the small beat-to-beat changes that tend to grow when you’re at rest) more than 4-7-8 or box breathing. None of the patterns changed mood or blood pressure much in a single session (Marchant et al. 2025).

In a crossover trial of 34 students, 10 minutes of 4-7-8 didn’t change heart rate variability compared with resting. Women reported less stress and fewer unpleasant feelings afterwards, a result that still needs repeating (Avcık et al. 2026).

So: a pleasant way to wind down, with limited and mixed evidence. Slow breathing without the long hold does at least as well on the body’s measures.

Every study on this page (5)

• Russo et al., 2017: An overview of research in healthy people suggests slow breathing affects the heart, lungs and nervous system; more study is needed.
• Byrne et al., 2026: In a 32-person pilot, adding a hold after breathing in lowered a stress hormone more than plain slow breathing; neither changed mood.
• Vierra et al., 2022: In 43 healthy young adults, heart rate and blood pressure dipped straight after 4-7-8 breathing, though quiet rest may partly explain it.
• Marchant et al., 2025: In 84 students, six breaths a minute raised heart-rhythm signs of calm modestly more than box or 4-7-8 breathing; none changed mood.
• Avcık et al., 2026: In 34 students, neither 4-7-8 nor alternate-nostril (Nadi Shodhana) breathing changed heart-rhythm measures; stress and mood effects differed between women and men.

Is 4-7-8 breathing good for anxiety?

It can be, if the hold feels comfortable. Some people find the long pause calming. Others find that holding their breath makes anxiety louder, especially when their chest already feels tight. If that’s you, start with the out-breath instead: 4 in and 6 or 8 out, no holds. Breathform has that one too: 4 in and 6 out is Unwind, and it’s free. Breathing exercises for anxiety has more to choose from.

Why does the hold feel hard?

4-7-8 or box breathing: which is better?

It depends on the job. 4-7-8 is slow and heavy, with most of each round spent holding and breathing out, so it suits winding down. Box breathing is even and steady, so it suits staying composed before something. We put them side by side, with a figure of one round of each, in box breathing vs 4-7-8.

Questions people ask

Where did 4-7-8 breathing come from?

Dr Andrew Weil, an American doctor known for integrative medicine, popularised it and calls it the relaxing breath. It’s usually described as adapted from pranayama, the breathing practices of yoga, which have used counted breaths and holds for a very long time. The name is simply the count: 4 in, 7 holding, 8 out.

Can you overdo 4-7-8?

You can overdo the hold. If you feel light-headed, shorten it or stop for a few normal breaths. Four rounds at a time is plenty, which is also what Dr Weil suggests for the first month. Doing it several times a day is fine: it’s the length of each sitting, not how often you do it, that’s worth keeping short.

Does 4-7-8 breathing lower blood pressure?

Not reliably, on the evidence so far. One small study found systolic pressure fell straight after 4-7-8, but it had no comparison group, and a lab comparison found no real change. Regular slow breathing in general is linked to modest drops in people with raised blood pressure. Use it alongside your treatment, not instead of it: see breathing exercises to lower blood pressure.

Should I breathe through my nose or mouth for 4-7-8?

In through your nose and out through your mouth, in the classic version. The mouth makes the long out-breath easy to hear and to pace. If the “whoosh” feels too loud next to someone sleeping, breathe out slowly through your nose instead and keep the same count. The shape matters more than the route.

Can I do 4-7-8 lying down?

Yes. Dr Weil suggests sitting with your back straight while you learn it, but at bedtime lying on your back or your side works well. Keep your head supported so your throat stays relaxed during the hold. If you fall asleep partway through the four rounds, there’s nothing left to finish.