What is 4-7-8 breathing?

4-7-8 breathing is a counted breathing pattern. You breathe in for a count of four, hold the breath for seven, and breathe out slowly for eight. It was popularised by the physician Andrew Weil, who adapted it from older yogic breathing practice, and it is now one of the most widely shared techniques for winding down at night.

How to do it

Sit up or lie in the position you would usually sleep in. Let the tip of your tongue rest just behind your top front teeth, which makes the slow out-breath easier to control.

1. Breathe out completely through your mouth.
2. Close your mouth and breathe in quietly through your nose for a count of four.
3. Hold your breath for a count of seven.
4. Breathe out through your mouth for a count of eight, slowly and steadily.

That is one cycle. Four cycles is a sensible place to start; it takes a little over a minute. Our guided version keeps the count for you with a dim ring, so you can close your eyes and follow the voice.

The counts are a ratio, not a test

The numbers matter less than their proportion: the out-breath is twice as long as the in-breath. If holding for seven feels like a strain, count faster. You should never feel short of breath, light-headed or anxious about the hold. If you do, stop and breathe normally.

The long out-breath is the point. The hold just makes room for it.

Why it might help

When you are wound up, breathing tends to be quick and high in the chest. Slowing it down, and especially lengthening the out-breath, is associated with a shift in the nervous system towards the “rest” side of its balance, which shows up as changes in heart rate variability.

A 2018 systematic review of slow-breathing studies found consistent links between slow breathing and markers of that calmer state, along with reports of feeling more relaxed. Most of those studies used around six breaths a minute. A full 4-7-8 cycle takes nineteen seconds, closer to three breaths a minute, so the pattern is slower than most of the research and adds a hold that most studies do not.

The counting helps in a second, simpler way. Holding a number in mind gives an anxious, busy mind something small and neutral to do, much like the cognitive shuffle does with pictures.

What is known, and what is not

Research on 4-7-8 itself is thin. A 2022 study in healthy young adults found that the technique improved heart rate variability and blood pressure measures after a night of sleep deprivation, but it did not test whether people fell asleep faster, and it did not involve people with insomnia.

What is better established is relaxation training in general. American sleep medicine guidelines list relaxation therapy as a reasonable treatment for chronic insomnia, usually as part of a wider programme. 4-7-8 breathing belongs to that family. It is best thought of as a quick way to settle your body before sleep, or after waking in the night, rather than as a cure.

Who should be careful

Breath holds are not right for everyone. If you have asthma, COPD or another breathing condition, a heart condition, or you are pregnant, check with a doctor first. You can also skip the hold entirely and keep only the long out-breath, which keeps most of the benefit.

When to stop

If a few rounds leave you more alert rather than less, that is useful to know: try a different technique, or get up for a while and come back when you feel sleepy. And if sleep has been difficult most nights for weeks, a doctor can help with a fuller programme. We have written about when it is worth asking.