Slow breathing: what the evidence says

Breathing slowly, around six breaths a minute, reliably shifts the body toward its calming (parasympathetic) state. A 2022 meta-analysis of 223 studies found it increases heart rate variability during practice, right after a session, and after weeks of practice. Training programs built on it reduce self-reported stress and anxiety. It is free, quick to learn and low-risk.

Does slow breathing calm the body? A 223-study meta-analysis found it raises heart rate variability. What it does, how to do it, and the limits of the evidence.

Beiing evidence map

Evidence: Moderate for calming the body (strong physiological evidence) and reducing everyday stress and anxiety (moderate)

Start a Calm session (slow breath pacing)

How to do it

  1. Sit or lie comfortably and let your shoulders drop.
  2. Breathe in gently through your nose for about 5 seconds.
  3. Breathe out slowly for about 5 seconds, a little longer if that feels easier.
  4. Keep it soft, not forced. Continue for 5 to 10 minutes.
  5. If you feel lightheaded, return to normal breathing for a while.

What the research shows

The physiological effect is well established. Laborde and colleagues pooled 223 studies of voluntary slow breathing and found increases in vagally mediated heart rate variability, a marker of the body's calming system, during a session, immediately after one session, and after multi-session programs.

The effect on how people feel is supported too, with caveats. A meta-analysis of 24 studies of heart rate variability biofeedback, which trains breathing at a slow resonance pace, found a large reduction in self-reported stress and anxiety. The authors called for more well-controlled trials.

What remains less certain: how much benefit carries into daily life without practice, and how slow breathing compares with other calming methods head to head.

What "Moderate" means here: Meta-analyses or several trials point the same way, but with real caveats (small studies, mixed quality, wide uncertainty). Rated for: Calming the body (strong physiological evidence) and reducing everyday stress and anxiety (moderate).

Key studies

Safety notes

Common questions

Why six breaths a minute?

Biofeedback programs often train breathing near six breaths a minute (about 5 seconds in, 5 seconds out), a common estimate of the pace at which heart rate and breathing move together most strongly. The meta-analysis above covered slow breathing in general, so anything comfortably slow helps; precision is not required.

How long before it works?

Heart rate variability rises during the practice itself. Studies of multi-week programs suggest regular practice adds benefits over time.

Checked against the studies above on October 28, 2026 by Beiing's editorial and research team (writers and researchers, not licensed clinicians). How we review · For clinicians

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Medical Disclaimer: This content is for informational and educational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition. If you are in crisis or thinking about self-harm, call or text 988 (US Suicide & Crisis Lifeline), or visit our crisis resources.

Educational content only - not medical advice. In a crisis, call or text 988 (US) or your local emergency number. See crisis resources.