4-7-8 breathing and other breathing exercises for sleep

Breathe along

Pick a pattern, press start, and follow the circle. It grows as you breathe in and shrinks as you breathe out. Dim your screen if you're doing this in bed.

Why slow breathing helps you sleep

When you're stressed, your breathing gets faster and shallower, and your heart rate follows. It also works the other way round. Slowing your breathing to around 6 breaths a minute, and making the out-breath longer than the in-breath, nudges the nervous system away from "alert" and toward "rest". Heart rate drops a little, muscles loosen, and there's less fuel for racing thoughts.

It also gives your attention something simple to hold. Counting breaths is hard to do while you're also rehearsing tomorrow's meeting.

What the research says, honestly

A 2026 systematic review of slow breathing before bed found that people consistently reported better sleep quality and longer sleep after a few weeks of practice. Studies that measured sleep objectively, with sleep trackers or in a lab, were fewer and their results were mixed. A small 2026 trial of 4-7-8 breathing over four weeks found better sleep quality scores, and a 2022 study found it shifted heart rate variability toward relaxation.

So breathing exercises aren't a cure for insomnia. They're a reliable way to feel calmer at bedtime and when you wake in the night, which is why relaxation is one of the five parts of CBT-I.

Four techniques to try

1. Slow breathing (4 in, 6 out)

The easiest place to start. Breathe in gently through your nose for a count of 4, and out through your nose or softly through your mouth for 6. No holds. Three to five minutes. Good for any time, including the middle of the night.

2. 4-7-8 breathing

Popularized by Dr Andrew Weil and based on yogic breathing.

1. Breathe out completely through your mouth.
2. Close your mouth and breathe in quietly through your nose for 4.
3. Hold your breath for 7.
4. Breathe out through your mouth for 8, with a soft whoosh.
5. That's one round. Do four rounds to begin with.

The counts are about ratio, not seconds. If 7 feels long, count faster. If holding your breath makes you feel anxious or light-headed, use the gentle version below.

3. Gentle 4-8 (4-7-8 without the hold)

Breathe in for 4, out for 8, no hold. You keep the long exhale that does most of the work, without the breath-hold that some people find uncomfortable. This is the version Let Me Sleep uses by default.

4. Box breathing (4-4-4-4)

In for 4, hold for 4, out for 4, hold for 4. Popular for staying steady under pressure. The equal rhythm makes it easy to follow, though it's a little less sleepy than patterns with a longer out-breath.

Tips that make it work

• Breathe low. Rest a hand on your belly and let it rise, rather than lifting your chest and shoulders.
• Don't force it. Smooth and quiet beats big and deep. Over-breathing can make you dizzy.
• Practise in the day too. A skill you've practised at 4 PM is much easier to use at 3 AM.
• Pair it with a routine. A few minutes of breathing at the same point in your wind-down becomes a cue for sleep.

Stop and breathe normally if you feel light-headed. If you have a heart or lung condition, or you're pregnant, check with your doctor before practising breath-holds.