Breathwork
Cyclic sighing, a double breath to reset.
Cyclic sighing, sometimes called the physiological sigh, is a slow double inhale through the nose followed by a long exhale through the mouth. Repeated for a few minutes, it is one of the quickest ways to settle the body, and the pattern that performed best in a 2023 Stanford study of daily breathing practices.
Last updated: August 2026
The pattern
- Inhale through the nose for 3 counts, filling most of the way.
- Inhale again for 1 count, a short top-up to full.
- Exhale slowly through the mouth for 6 counts, letting all of it go.
One cycle · 10 counts · session runs 5 minutes
The exhale is the working part. It runs longer than both inhales together, and a long exhale is the body's own signal to slow down. The second, smaller inhale is thought to re-open air pockets in the lungs that deflate during ordinary breathing, so the exhale that follows can carry more out.
When to reach for it
This is a pattern for the moment something has wound you up: before a difficult call, after one, the hour when your mind will not slow down. It needs no preparation and no quiet room, and a round or two fits in the time a kettle takes. In Reed it is the session waiting on Home the first time you open the app, before you have practised anything else.
What the research shows
In a 2023 randomized Stanford study in Cell Reports Medicine, five minutes a day of cyclic sighing improved mood and lowered breathing rate over a month, and it performed best among the daily five-minute practices the study compared. It is one small study: a reason to try something, not proof of anything.
Practising safely
Cyclic sighing is one of the gentler patterns, with no breath-hold and no forcing. Even so, practise sitting or lying down somewhere safe, never while driving or in water, and stop if you feel dizzy or unwell. If you are pregnant, or have a heart condition, high or low blood pressure, a respiratory condition, epilepsy, or experience panic attacks, check with a doctor before you begin. Reed is for general wellbeing; it is not medical advice or treatment.
Five minutes, guided by a single orb that swells with each inhale and settles on the long exhale. You mark how you feel before and after, and Reed shows you the shift.
Free, like every session, with no account.
Questions
Is cyclic sighing the same as the physiological sigh?
Yes. The physiological sigh is the reflex itself: the double intake of breath the body does on its own from time to time. Cyclic sighing is the practice of repeating that reflex on purpose for a few minutes.
How long should I practise cyclic sighing?
The Stanford study measured five minutes a day, and that is the length of Reed's session. One sigh on its own can help for a moment; the study's results came from five minutes a day.
Can I do it lying down?
Yes. Sitting or lying down both work, anywhere safe. It is a gentle pattern, with no breath-hold and no forcing.
Is cyclic sighing free in Reed?
Yes. Every session in Reed is free and unlimited, with no account. Reed Pro adds personal insights on top; it never locks a session.