4-7-8 breathing
Inhale for 4, hold for 7, exhale for 8. The pattern emphasizes a longer exhale, which may support relaxation.
Typical cadence
- Inhale 4s • Hold 7s • Exhale 8s • No rest
- If the 7-second hold feels uncomfortable, begin with fewer repeats
How it works
This 4–7–8 style combines a longer exhale with a pause. Longer-exhale patterns may support relaxation, but direct trials of this exact pattern are limited, so a distinct vagal mechanism or benefit has not been established.
Evidence highlights
- Reviews find slow or paced breathing is often associated with higher HRV and lower arousal in healthy adults; protocols and results vary.
- In Van Diest et al. (n=30), a longer exhale was associated with more self-reported relaxation; higher HF-HRV appeared only at the slow breathing rate.
- HRV-biofeedback research suggests slow, structured breathing may support baroreflex function and mood regulation; it does not establish benefits of this exact 4–7–8 pattern.
How to practice
- Begin with fewer repeats if needed, or practise the rhythm first in Custom
- Do not force the breath; stop and return to normal breathing if a hold feels strained
Safety notes
- Extended holds may not suit everyone — use fewer repeats or practise in Custom
- If you have respiratory or cardiovascular conditions, check with a clinician
References
- Zaccaro et al., 2018 — Systematic review of slow breathing (Frontiers in Human Neuroscience)
- Lehrer & Gevirtz, 2014 — Review of HRV biofeedback mechanisms (Frontiers in Psychology)
- Russo et al., 2017 — Review of slow-breathing physiology (Breathe)
Disclaimer: This information is educational and not medical advice. If you have cardiopulmonary or other medical conditions, consult a healthcare professional before changing your breathing practices.
