Breathing for sleep: the guided bedtime exercise

To wind down before sleep, lengthen your exhale: breathe in through your nose for 4 seconds, then out gently for 6 seconds, with no pauses, for 5 to 10 minutes. That works out to 6 breaths a minute. It won’t put you to sleep on command, but it gives your body and your attention a slow rhythm to follow instead of the day’s thoughts.

Guided exercise

In for 4 s · out for 6 s

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Length: 3 minLength: 5 minLength: 10 min

How to do it, step by step

Ideally, learn the rhythm with the guide, then repeat it without a screen, lights off.

Set up the room. Dim the lights and put your phone out of reach once you have the rhythm down.
Lie down. On your back or your side, one hand on your belly to feel your breath.
Breathe in through your nose for 4 seconds. No need to fill your lungs all the way.
Breathe out for 6 seconds. Slowly, through your nose or slightly parted lips, as if you wanted a candle flame to flicker without going out.
Keep going for 5 to 10 minutes. If you lose count, just start again at 1, no judgment.
Let the rhythm fade. As sleep gets closer, stop counting and let your breathing take care of itself.

Why a longer exhale?

Slowing down to about 6 breaths a minute is the best-studied part: while you practice, it reliably increases the heart rate variability measures linked to the vagus nerve, the “rest” branch of your nervous system (see our page on coherent breathing).

A longer exhale might add something, but studies disagree. In 2014, a research team (Van Diest and colleagues) had 30 participants breathe in four different patterns. With an exhale longer than the inhale, they reported feeling more relaxed, less stressed and more present, and the breathing-related component of heart rate variability went up, but only at 6 breaths a minute. In 2021, another study (Magnon and colleagues) found that a single session of slow breathing with a longer exhale raised that same component and lowered in-the-moment anxiety, in 25 young adults and 22 older adults alike. On the other hand, two experiments published in 2024 (Meehan and Shaffer, with 26 and then 16 participants) found no difference in heart rate variability between an exhale twice as long as the inhale and an equal one. Their review of earlier work counts four studies favoring a longer exhale, three finding no effect of the ratio, one favoring equal lengths and one favoring a longer inhale.

Our take: a longer exhale isn’t essential, but many people find it more soothing, and that feeling is exactly what the supportive studies measured.

Breathing and sleep: what the studies say

The study closest to this exercise dates from 2019 (Laborde and colleagues). Sixty-four healthy young adults who already slept well practiced breathing at about 6 breaths a minute (4.5 seconds in, 5.5 seconds out) for 15 minutes every evening before bed, for 30 days. Compared with a group that spent those 15 minutes on social media, their self-reported sleep quality improved slightly, and their vagal heart activity during the night went up.

The limits are clear: people with no sleep problems, sleep rated by questionnaire rather than measured in a lab, and a comparison group that did no relaxation exercise at all. These results say nothing about insomnia. If you’ve been sleeping badly for several weeks, talk to your doctor.

A 15-minute bedtime routine

A simple suggestion to adapt to your evenings:

Put the day down. Write one line about whatever is still on your mind, so you don’t have to hold on to it.
Dim the lights and move your phone away, after starting the guide if you need it.
Breathe for 5 to 10 minutes at the 4-6 pace, lying down.
Read two or three gentle sentences, for example from our affirmations for sleep or our evening affirmations.
Let your breath go free and close your eyes.

If you wake up at night

No need to turn the screen back on: count on your fingers, four to breathe in, six to breathe out, about ten times. If the exercise wakes you up more, or counting starts to annoy you, stop and simply let your attention rest on the weight of your body in the bed.

Safety tips

No forced breathing. Breathing too deeply can make you lightheaded or tingly: breathe more gently.
If slow breathing makes you anxious, stop: for some people, relaxation techniques raise anxiety instead of lowering it.
If you’ve slept poorly for a long time or feel very tired during the day, see a doctor: no exercise replaces that checkup.

Selfia is not a medical device. If you’re struggling or thinking about suicide, help is available: in the US, call or text 988; in the UK and Ireland, call Samaritans on 116 123; anywhere else, find a local line at findahelpline.com.

Frequently asked questions

What’s the best breathing exercise to fall asleep fast?

No technique guarantees falling asleep fast. Slow breathing with a longer exhale, like the 4-6 pace on this page, is simple and has no breath hold. 4-7-8 breathing is popular at bedtime, but it hasn’t been studied for sleep. Pick the one that feels most comfortable: that’s the one you’ll keep doing.

How long should I breathe before bed?

Five to ten minutes is enough for most people. In the 2019 study of good sleepers, participants breathed slowly for 15 minutes every evening for a month. Consistency matters more than length: a short session every night creates a cue your body links with going to sleep.

Should I breathe through my nose or my mouth?

Breathe in through your nose if you can, since it’s slower and quieter. For the exhale, your nose or slightly parted lips both work: what matters is that it stays gentle and a little longer than the inhale. If your nose is blocked, breathe through your mouth and don’t worry about it.

What if I can’t make it to 6 seconds?

Shorten it: 3 seconds in and 5 out, or 4 and 5. What counts is a slower pace than usual and an exhale a bit longer than the inhale. Straining to hit an exact count creates the opposite of the calm you’re after.