5–7 BPM
Resonance
Six breaths per minute is the body's natural resonance frequency. The default and the one that improves HRV the most.
The protocol
Inhale through the nose for five seconds. Exhale through the nose (or pursed lips) for five seconds. Continue for three to ten minutes. No holds. No counting beyond the cadence — the app's blob does that for you.
Six breaths per minute (5s in, 5s out) is the default. If you have a smaller body or feel the rate is too slow, try 6.5 or 7 BPM. If you have a taller frame or have been training, drop to 5 BPM. Comfort matters more than precision.
Breathe into your belly, not your chest. If your shoulders rise on the inhale, the rate is too fast or the inhale is too forced.
Best for
Daily practice. HRV improvement. The starting point.
Why it works
The cardiovascular system has a built-in feedback loop called the baroreflex: when blood pressure rises, heart rate slows; when it falls, heart rate speeds up. The baroreflex normally oscillates at roughly 0.1 Hz — once every ten seconds, which corresponds to six breaths per minute.
When you breathe at six breaths per minute, your respiratory rhythm enters resonance with the baroreflex. The two feedback loops align. The result is a massive amplification of heart rate variability — your heart rate swings widely with each breath, exercising the vagus nerve like a muscle.
Over days and weeks of practice, this trains the parasympathetic nervous system. Resting HRV rises, baseline stress falls, and the autonomic nervous system gets better at returning to balance after challenges.
“Resonance frequency breathing maximizes heart rate variability via baroreflex resonance, with documented effects on autonomic balance and stress recovery.”
When to use it
Resonance breathing is the daily-driver technique. The single best protocol if you want to actually raise your HRV over weeks, not just feel calm in the moment.
Three minutes a day is the minimum effective dose. Ten minutes a day is where the literature shows the largest gains, with most studies reporting +10 to +25 percent baseline HRV improvement after eight to ten weeks.
Best in the morning before email, or in the late afternoon transition out of work mode. Avoid the hour before bed — six breaths per minute can leave you alert, not sleepy. For sleep, see 4-7-8.
Or try a different technique