Cyclic sighing: the 5-minute breathing protocol that beat meditation in a Stanford trial

Breathwork has a wide, sometimes vague reputation — "it calms you down" is true of almost any slow, deliberate breathing, which makes it hard to know if there is a specific, best-supported protocol worth actually learning versus a dozen equally-fine variations. A well-designed 2023 trial gives an unusually direct answer.

The study that compared four techniques head-to-head

Balban and colleagues (2023, Cell Reports Medicine) ran a randomised trial out of Stanford comparing four daily 5-minute practices over a month: cyclic sighing (a double inhale through the nose followed by a long exhale through the mouth), box breathing, cyclic hyperventilation, and mindfulness meditation as the active comparison. All four groups improved on mood and anxiety measures — but cyclic sighing produced the largest improvement in daily positive mood and the biggest reduction in resting respiratory rate, edging out meditation on the specific measures the trial tracked.

A double inhale, then a long exhale, for five minutes a day — outperforming meditation on mood in a controlled trial is a genuinely notable result for something this simple.

Why it likely works: physiological sighing, on purpose

The technique is modelled on the body’s own natural "physiological sigh" — the double-inhale pattern you spontaneously produce when stressed or short of breath — deliberately repeated to reopen collapsed alveoli in the lungs and shift the autonomic nervous system toward parasympathetic (rest-and-digest) dominance faster than slow breathing alone. The long exhale specifically is doing much of the work: extending the out-breath relative to the in-breath is one of the most consistent ways to raise heart-rate variability acutely.

How it fits alongside meditation, not instead of it

It is worth being precise about what the study shows: cyclic sighing outperformed meditation on THESE specific mood and physiological measures over THIS specific month — it is not a blanket claim that breathwork is superior to mindfulness practice in every respect meditation has been studied for (attention, rumination, chronic pain, and others have their own separate evidence bases, several favouring meditation). The practical takeaway is that cyclic sighing is a legitimate, well-evidenced, very low-time-cost option for a fast nervous-system reset — not a replacement for every other practice in this space.

Where it sits in Misi

Breathwork is logged as its own Mindset-category habit with a 5-minute target, contributing to the day’s Mind score and appearing in both the Stress & Recovery and Performance goal stacks — in the Performance stack specifically because a fast, reliable way to downshift the nervous system between hard training sessions has direct recovery value, not just a general wellness one.

Misi is a coaching and wellness platform, not a medical service. Breathwork is not a treatment for diagnosed anxiety disorders or panic disorder — seek professional support for those conditions.