4-7-8 Breathing for Sleep: How to Do It, Science of It, and More

by Daniel Timms

How can a simple breathing technique help with insomnia and stress? The 4-7-8 breathing method has been really effective for many people – myself included – at helping relax the body and mind ready for sleep.

The first time I tried it I was genuinely surprised the next day at how quickly I’d fallen asleep! It’s also been successful for some sufferers of PTSD and anxiety at reducing their symptoms by stimulating the Vagus Nerve.

In this article I’ll explain what it does to relax the body, and why it is so effective.


How To Perform 4-7-8 Breathing Exercise

  • Sit up straight in a relaxed position (or lie down comfortably, if you’re doing the exercise to fall into sleep),
  • Keep your tongue loosely against your upper front teeth for the entire exercise,
  • Inhale slowly through the nose (using the diaphragm rather than the chest) for 4 seconds (doesn’t need to be a full breath),
  • Hold your breath at this position for 7 seconds,
  • Release your breath through the mouth for a count of 8 seconds – the tongue position will help you extend the duration of the exhale and you should hear the sound of the air escaping,
  • Repeat several times (until you fall asleep or feel calmer, better).

To understand why this breathing pattern is so effective, we need to look at the autonomic nervous system, which is responsible for regulating the automatic functions of our body, such as heartrate, immune function and digestion.


Two Halves of the Autonomic Nervous System

Sympathetic Nervous System (SNS) – activated when we perceive danger or need alertness:

  • increased heartrate and blood pressure
  • puts us in “fight or flight” mode, ready for action
  • causes us to breathe shallow, from the chest
  • keeps us awake

Parasympathetic Nervous System (PNS) – activated when our body feels that it’s safe to relax

  • decreases heartrate and blood pressure
  • puts us in “rest and digest” mode
  • causes our muscles to relax
  • allows us to sleep

The sympathetic nervous system is super important, but with the busy modern life that many of us lead, full of stimulus and stress, it is activated too much of the time. Our PNS rarely has a chance to take over, which causes problems for recovery and especially for sleep!


Using 4-7-8 Breathing to Regulate Your Nervous System

Effects of Deep Breathing

We have minimal direct control over what our autonomic nervous system does, but via specific breathwork exercises it is actually possible to switch its state between the SNS and PNS.

When we breathe deeply (i.e., from the diaphragm rather than from the chest) we activate stretch receptors around the diaphragm linked to the parasympathetic nervous system. Any deep breathing will have this effect, but it’s especially powerful in the 4-7-8 method as we pause for 7 seconds in the slightly stretched position for a stronger “rest and digest” effect.

For many people, the level of cortisol (the “stress hormone”) is chronically high and this can hinder sleep. Deep breathing, such as in the 4-7-8 method, has been scientifically shown to reduce levels of cortisol.


Effects of Slow Breathing

Furthermore the rhythm of breathing affects our autonomic nervous system, with slow, controlled breathing activating the PNS. This should come as no surprise (given popular advice to “take a deep breath” when feeling overwhelmed) but it was only in 2016 that scientists first found the part of the brainstem that seems to cause this!

In the 4-7-8 pattern, each breath is very slow – around 19 seconds, so again it stimulates the part of the nervous system that allows us to sleep.


Reducing Effort for the Muscles

The last thing you need when trying to sleep is physical effort. It generates unnecessary heat, increases heart rate and generally prepares your body for sport rather than rest. Even something as simple as a breathing exercise can require some physical effort.

In particular, to extend the exhale for as long as 8 seconds, it is necessary to restrict the airflow out of the lungs. This would ordinarily be done by tensing up various muscles around the lungs and windpipe.

The 4-7-8 method avoids this by simply placing the tongue against the upper gums to restrict the airflow considerably. The muscles have minimal work to do and we can physically relax a lot faster.



If you’re like many people who have difficulty physically relaxing, this breathing technique may help you like it helped many before you. It quickly starts to activate the PNS and reduces cortisol, all while performing a meditative activity with minimal physical demands.

You can perform the 4-7-8 Breathing technique on Huma Breath. Simply go to the app’s exercise library, tap on the 4-7-8 Breathing exercise and you’re ready to go. The app tracks your progress and guides you through the exercise so you get out the most of each breath.

Here’s a Box Breathing Guide based on Huma Breath app for you to use:

Daniel Timms

Daniel Timms is an international competitor and coach in Mental Math and Memory.

He experiments and researches what the mind is capable of, and writes about these topics at daniel-timms.com

His aim is to make scientific ideas - including breathwork - accessible to a wider audience.

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j emanuel sebastian munoz March 25, 2020 - 5:22 am

great info though i have tried the 5-7-8 method and 5-5-7 helps a lot too. i try to control my breathing all the time helps me feel relaxed, since i am forbidden by my doctors to do heavy resistance training due to my heart attack last 2017. i concentrated on my taichi and some qi gong. your article helps alot and is very inspiring

Mahmoud March 19, 2020 - 12:33 pm


Thanks for the informative and very nuanced post. I can tell you put a lot of time and effort into your research and the post itself.

But just to clarify, we do the 4-7-8 breathing exercise sitting, not lying down; then, when feeling relaxed, lie down and attempt to sleep. Correct?

I was confused because the first step says:
Sit up straight in a relaxed position

And the last step says:
Repeat several times (until you fall asleep or feel calmer, better).

I’m confused because I can never fall asleep sitting up straight. I generally fall asleep with a lot of difficulty lying down, let alone sitting.

Thanks for clarifying.


Huma Team March 19, 2020 - 3:13 pm

Hey Mahmoud,

You can actually do the 4-7-8 breathing lying down if your purpose is to sleep. Normally, breathing exercises are done with a nice and tall posture. If you want to use 4-7-8 breathing to get calmer, more grounded, or reduce your anxiety you can do it sitting straight. For sleep, you can do it lying down.
I think I should add that to the article. Thanks for helping us clear that up!

Lil Ant July 31, 2020 - 8:02 am

Every night before bed, I meditate in darkness/dim light with eyes closed 1 hour right before jumping into the bed. I have incorporated this in my nightly routine, and I do it a bit in the beginning of the meditation, and the ending of the meditation. It helps enter the meditate state faster. Also, when I do it in the ending of meditation, it feels very profound and effective. Also falling asleep faster, which i a surprise to me that it is working. Thank you for this! More people should know.


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