4-7-8 breathing for sleep: does it really work?

How do you do 4-7-8 breathing?

This follows the protocol described in the trials. It was not tested as a "fall asleep" technique.

1. Lie down or sit comfortably.
2. Breathe out fully through your mouth with a soft whoosh.
3. Breathe in quietly through your nose for a count of 4.
4. Hold for a count of 7. Keep the hold relaxed, not tight.
5. Breathe out through your mouth for a count of 8.
6. That is one cycle. Do four in a row.

How often? One trial used four cycles in the morning and four in the evening. Another used six cycles, three times, in one session.

The counts are about timing, not speed. If 7 seconds feels too long, shorten all three numbers while keeping the exhale longest, for example 3-5-6. That is a common-sense comfort tip and it has not been tested. Stop if you feel dizzy.

Does 4-7-8 breathing help you sleep?

Here is what the studies found.

Six weeks of practice, in people with tinnitus

In 2026, a randomized trial in Brain and Behavior included 48 adults with long-standing tinnitus, which is ringing in the ears (Kirazli et al.). Everyone got an information session. One group of 23 also did 4-7-8 breathing, four cycles morning and evening, for 6 weeks.

Sleep was measured with the Insomnia Severity Index, a questionnaire where lower scores mean fewer sleep problems. The breathing group's average went from about 8.4 to about 4.4. The comparison group stayed about the same (about 11.9 before and 12.3 after).

That sounds great, but I would not lean on it too hard:

• People knew which group they were in, and sleep was self-rated.
• The comparison group did nothing extra, so we cannot separate the breathing from the time, attention and hope of doing something.
• The groups did not start equal. The comparison group began with worse sleep scores.
• It was small, short, with no long-term follow-up, and in people with tinnitus, so it may not apply to everyone.

Four weeks of practice, in nursing students

A randomized trial of 82 nursing students compared a 4-7-8 group with a no-intervention group over four weeks. Its main outcome was a questionnaire about sleep over the past month (ClinicalTrials.gov NCT06103344). The results were published in 2026 in the European Journal of Integrative Medicine (Doğan and Sungur). I could confirm the study exists, but I could not open the article, so I will not quote numbers I have not read.

One session, in healthy young adults

In 2022, researchers studied 43 healthy adults aged 19 to 25, mostly women (Vierra et al.). Everyone did one session of 4-7-8 breathing. Afterwards, heart rate and the top blood pressure number were lower. This tells us about short-term effects on the body, not about sleep, which the study did not measure.

A word on big before-and-after numbers

One 2025 study of 45 people with COPD, a long-term lung condition, reported an average sleep score falling from 13.33 to 4.93 after about a month (Satria et al.). It had no comparison group, and sleep was measured only by questionnaire. A big change with no comparison could be the effect of time, attention or expectation, so I would not use it to promise anything.

What is still unknown

• Whether doing 4-7-8 in bed helps you fall asleep sooner that night. I found no trial that measured this.
• Whether it works better than other slow breathing, or than lying still with a relaxing routine.
• Whether sleep measured by a device (not a questionnaire) changes.
• Whether the 7-second hold matters. No study I read compared it with the same long-exhale breathing without a hold.

The research in a nutshell

How strong is the evidence? Weak to early. A few small trials look encouraging on self-reported sleep, but none tests falling asleep faster, and none uses a device to measure sleep.