Resonance breathing at 6 breaths a minute: the evidence behind HRV breathing

2 peer-reviewed sources, DOI-verifiedUpdated Oct 1, 2026How we verify

Breathing at about six breaths per minute — five seconds in, five seconds out — is called resonance breathing. It is the pace used in heart rate variability (HRV) biofeedback, and it has some of the strongest research behind it of any breathing practice for stress.

What “resonance” means

Your heart rate rises a little when you breathe in and falls when you breathe out. For most adults, at around six breaths a minute these rises and falls line up with the body’s blood-pressure reflexes and become unusually large. Lehrer and Gevirtz describe this as breathing at your resonance frequency, and suggest that practising it regularly may strengthen the reflexes that help regulate arousal.

The evidence

A meta-analysis pooled 24 studies with 484 participants who received HRV biofeedback training for stress and anxiety. Training was associated with a large reduction in self-reported stress and anxiety, with a between-group effect size of g = 0.83 compared with control conditions.

The authors also note that more well-controlled studies are needed. Biofeedback programs usually include coaching and devices, so results for breathing alone, without feedback, may differ.

How to practise without a device

1. Sit comfortably and let your shoulders drop.
2. Breathe in gently through your nose for about five seconds.
3. Breathe out smoothly for about five seconds. Don’t force it.
4. Continue for 5–10 minutes, ideally once or twice a day.

Our Breathing Regulator has a resonance mode with a visual pacer. If six breaths a minute feels like a strain, start a little faster and slow down over a few sessions.

Resonance breathing vs. cyclic sighing

Think of resonance breathing as daily training and cyclic sighing as a quick reset in the moment. Both slow and lengthen your breathing; resonance breathing has the broader research base.