4-7-8 breathing exercise
Follow the circle as it grows and shrinks. Choose 4-7-8 breathing, box breathing, cyclic sighing or slow breathing, pick 1, 3 or 5 minutes, and press Start.
Quick answer: 4-7-8 breathing means breathing in through your nose for 4 seconds, holding for 7 and breathing out through your mouth for 8. One round takes 19 seconds, about 3 breaths a minute. A small 2022 study found it lowered heart rate and blood pressure right after the exercise, but no good study yet shows it helps you fall asleep faster.
Key facts
- Vierra et al., 2022: 43 healthy adults aged 19 to 25, three sets of six cycles
- Cyclic sighing improved mood more than mindfulness meditation in a 2023 trial (Balban et al.)
- A review linked slow breathing, under 10 breaths a minute, with higher heart rate variability (Zaccaro et al., 2018)
- Stop and breathe normally if you feel dizzy or lightheaded
Ready when you are
Breathe gently, never to the point of strain. If you feel dizzy or lightheaded, stop and breathe normally.
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How the pacer is timed
The pacer times each step and counts rounds. Breaths a minute = 60 ÷ the seconds in one round.
- 4-7-8: in 4 s, hold 7 s, out 8 s = 19 s a round, about 3.2 breaths a minute[1].
- Box breathing: in 4, hold 4, out 4, hold 4 = 16 s, about 3.8 breaths a minute.
- Cyclic sighing: in 3 s, a short second breath in 1 s, long breath out 6 s = 10 s, 6 breaths a minute[2].
- Slow breathing: in 5 s, out 5 s = 6 breaths a minute, inside the under-10-a-minute range in the review[3].
How to do 4-7-8 breathing
- Sit or lie comfortably and let your shoulders drop.
- Breathe in quietly through your nose for a count of 4.
- Hold your breath for a count of 7.
- Breathe out slowly through your mouth for a count of 8.
- Repeat. Start with a few rounds. The long hold can feel hard at first, so it is fine to count faster, as long as you keep the 4:7:8 ratio.
The pacer counts in seconds. If that feels too slow, try slow breathing or cyclic sighing instead.
What the research says
4-7-8 breathing. In a 2022 study of 43 healthy adults aged 19 to 25, three sets of six 4-7-8 cycles lowered heart rate and systolic blood pressure straight after the exercise[1]. It was a small daytime lab study, not a test of falling asleep.
Cyclic sighing. A 2023 randomized trial asked people to do five minutes of breathing practice or mindfulness meditation each day for a month. Cyclic sighing, a double breath in followed by a long, slow breath out, led to a greater improvement in mood and a larger drop in resting breathing rate than mindfulness meditation. Box breathing was also tested in that trial[2]. Our timing for cyclic sighing is an approximation of that pattern.
Slow breathing. A systematic review of 15 studies looked at slow breathing, below 10 breaths a minute. It linked slow breathing with higher heart rate variability and with feeling more relaxed[3]. The 5-5 pattern here works out to 6 breaths a minute.
None of these studies measured how quickly people fell asleep, so we can’t promise that. What they do suggest is that a few minutes of slow, paced breathing can calm the body down, which is a reasonable part of a wind-down routine.
Fitting it into your night
- Do it in bed with the lights low. Three to five minutes is plenty. The pacer stops on its own and pauses if you leave the page.
- Pair it with a sound. Slow drum-free sleep music or ocean waves, with their natural rise and fall, sit well under a breathing exercise. You can also play a sound in our browser sound player in another tab.
- Set your bedtime first. The sleep calculator suggests bedtimes from your alarm. If an afternoon coffee keeps you up, try the caffeine timing tool.
Questions
Does 4-7-8 breathing help you fall asleep?
There is no good study yet showing that 4-7-8 breathing makes people fall asleep faster. A small study found it lowered heart rate and blood pressure right after the exercise, which is why many people use it to wind down.
How many rounds of 4-7-8 should I do?
Start with a few rounds and build up if it feels comfortable. The study we cite used three sets of six cycles. One to three minutes on the pacer is a gentle place to start.
What is box breathing?
Box breathing is four equal steps: breathe in for 4, hold for 4, breathe out for 4 and hold for 4. It is easier for many people than 4-7-8 because the holds are shorter.
What is cyclic sighing?
Cyclic sighing is a double breath in through the nose, a full breath and then a short top-up, followed by a long, slow breath out. In a 2023 trial, five minutes a day improved mood more than mindfulness meditation.
Is breathing practice safe for everyone?
It is gentle for most people, but stop if you feel dizzy or short of breath. If you have a heart or lung condition or are pregnant, check with your doctor before doing long breath holds.
Sources
- Vierra J et al. Effects of sleep deprivation and 4-7-8 breathing control on heart rate variability, blood pressure, blood glucose, and endothelial function in healthy young adults. Physiological Reports, 2022.
- Balban MY et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine, 2023.
- Zaccaro A et al. How Breath-Control Can Change Your Life: A Systematic Review on Psycho-Physiological Correlates of Slow Breathing. Frontiers in Human Neuroscience, 2018.
This tool gives general estimates for healthy adults and is not medical advice. If you are often tired despite enough time in bed, snore loudly, or struggle to sleep on most nights, talk to a doctor or a sleep specialist.