Cyclic Sighing

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Breathe In

Cycle 1 of 6

11 seconds per cycle

33 seconds total

inhale

exhale

A sustained practice of double-inhale sighs with long exhales, shown in research to lift mood and lower stress more than mindfulness alone.

Cadence: 5.5 bpm
Difficulty: beginner
Effect: Strongly calming
Family: Settle Retrain
For: Stress ReliefAnxiety

How to practice

1.Sit comfortably where you can breathe freely for a few minutes.
2.Inhale through your nose until the lungs feel comfortably full.
3.Add a second short sip of air through the nose to fully expand the lungs.
4.Release a long, slow, unhurried exhale through the mouth until the lungs are empty.
5.Repeat this double-inhale sigh continuously for about five minutes, keeping every exhale longer than the inhale.

When to use this

As a short daily practice (five minutes in the morning or after work) when you want to steadily lift your mood and lower your baseline stress rather than just handle a single spike.

Benefits

Improves mood over a daily practice
Reduces resting breathing rate
Lowers stress and anxiety
Only a few minutes a day

Mechanism

Each cycle uses the same double inhale to reinflate collapsed air sacs and a long exhale to offload carbon dioxide and slow the heart via the vagus nerve. Sustained over several minutes, the emphasis on prolonged exhalation keeps the body tilted toward the parasympathetic 'rest and digest' state, which lowers resting breathing rate and, over days of practice, appears to shift mood in a positive direction. In short, it's the physiological sigh scaled from a quick reset into a deliberate daily exercise.

Evidence

Evidence · Moderate

This technique is unusually well anchored for breathwork: a 2023 Stanford randomised controlled trial (Balban et al., Cell Reports Medicine) compared five minutes a day of cyclic sighing, box breathing, cyclic hyperventilation, and mindfulness meditation over a month, and cyclic sighing produced the greatest improvement in mood and the largest drop in resting respiratory rate. The study was relatively small and ran for a month, so the findings are promising rather than the final word, and results vary between people. Still, it's among the better-evidenced quick daily practices available.

1.Balban MY, Neri E, Kogon MM, et al. (2023). Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine. doi:10.1016/j.xcrm.2023.100895

Lineage

Cyclic sighing is the sustained, deliberate practice of the body's natural sigh reflex, whose brainstem circuitry was mapped by Stanford and UCLA researchers in 2016. The specific five-minute daily protocol was developed and tested at Stanford by the labs of Andrew Huberman and psychiatrist David Spiegel, and reported in the 2023 Balban et al. study that put the method on the map.

Variations and progression

An all-nasal version (both inhales and the exhale through the nose) for a quieter practice.
Shorter two- or three-minute sessions when five minutes isn't practical.
A slightly longer exhale (a bigger in-to-out ratio) once the rhythm feels natural, to deepen the downshift.

Begin with two to three minutes and focus purely on making each exhale longer and smoother than the inhale. Build to the studied five minutes daily, ideally at a consistent time so it becomes a habit. As it settles, resist the urge to speed up, the advancement is a slower, quieter breath sustained for the full five minutes, not more cycles crammed in.

Practice next

Common mistakes

Turning it into fast, forceful breathing, cyclic sighing is slow and gentle, the opposite of hyperventilation.
Dropping the second inhale, which is the feature that distinguishes a sigh from an ordinary breath.
Chasing a huge inhale so the exhale can't stay long and even; keep the in-breath modest.

FAQ

How is this different from the physiological sigh?

They're the same breath. A physiological sigh is one or two done reactively for a quick reset; cyclic sighing is that sigh repeated for several minutes as a deliberate daily practice.

How long before I notice anything?

Many people feel calmer within a single session, but the mood benefits in the research came from doing it daily over weeks. Consistency is the point.

Is five minutes the magic number?

It's simply the dose used in the study, and it's a practical target. Shorter sessions still help; the daily habit matters more than hitting an exact time.

Safety

If you feel lightheaded, slow down or return to normal breathing, the practice should feel calming, never breathless.
Keep it slow and gentle; this is not a fast or forceful breathing method.
Breathwork complements, not replaces, medical care. Check with a clinician first if you're pregnant or have a heart or respiratory condition.

Breathwork is a complement to (not a replacement for) professional medical care. If you have a heart, respiratory, or blood-pressure condition, are pregnant, or feel unwell, check with a clinician before practising breath-hold techniques.