Cyclic sighing (one minute of repeated physiological sighs)
Repeat the double-inhale pattern continuously for one to five minutes for a sustained shift in state.
Key takeaways
- What it is: Repeat the double-inhale pattern continuously for one to five minutes for a sustained shift in state.
- Why it works: A single physiological sigh provides a fast acute reset; repeated cycles over a minute or more maintain the amplified CO2 off-loading and progressively deepen the parasympathetic shift. The Balban et al. study specifically tested cyclic sighing in this one-minute repeating format and found it outperformed other breathing conditions on anxiety reduction and positive affect.
- Evidence: Backed by randomized trials / meta-analyses.
- Avoid: Trying to do cyclic sighing quickly in a rush to "get it done." Speed makes the second inhale a gasp and the exhale too short — both undermine the CO2 off-loading mechanism.
Why it works
A single physiological sigh provides a fast acute reset; repeated cycles over a minute or more maintain the amplified CO2 off-loading and progressively deepen the parasympathetic shift. The Balban et al. study specifically tested cyclic sighing in this one-minute repeating format and found it outperformed other breathing conditions on anxiety reduction and positive affect.
How to do it
- 1Set a timer for one to five minutes.
- 2Breathe in a continuous rhythm: double inhale, long exhale, double inhale, long exhale.
- 3Keep the pace unhurried — the exhale should be slow, not rushed.
- 4After the timer, sit quietly for 30 seconds and notice the shift.
What the evidence says
RCT / meta-analysisThis is the specific protocol tested in Balban et al. (2023), which found one minute of cyclic sighing reduced anxiety and improved mood more than box breathing or cyclic hyperventilation in a randomized comparison of 100+ participants over four weeks.
Honest caveat: Single study; participants were general-population adults, not clinical anxiety populations. Effect sizes were real but modest. Do not substitute for clinical treatment of anxiety disorders.
- — Balban et al. (2023), brief structured respiration practices enhance mood and reduce physiological arousal, Cell Reports Medicine
Common mistake
Trying to do cyclic sighing quickly in a rush to "get it done." Speed makes the second inhale a gasp and the exhale too short — both undermine the CO2 off-loading mechanism.
IX Coach can lead a guided one-minute cyclic sighing session with paced audio cues, so you can do it with eyes closed rather than watching a timer.
Practice this with IX Coach →