Coherent breathing: six breaths a minute, what it does and how to practise

What happens at six breaths a minute

Every breath nudges the heart. Breathing in, heart rate rises slightly; breathing out, it falls. At normal breathing speed these ripples are small. When you slow down to around six breaths a minute, the ripples grow much larger. Lehrer and Gevirtz report that the biggest heart-rate oscillations at breathing frequency occur at about that pace. Researchers call this resonance.

That is why the method has several names. In English research it is often called resonance-frequency breathing, or slow paced breathing, and the training that uses a heart-rate display to guide it is called heart rate variability biofeedback. In France it is widely known as cohérence cardiaque. They describe the same practice.

A review by Russo and colleagues defines slow breathing as any rate from 4 to 10 breaths a minute, against a typical resting rate of 10 to 20. Six sits comfortably inside the slow range.

Your own rate may not be exactly six

Six breaths a minute is an average. Vaschillo and colleagues measured individual resonance frequencies and found them lower in men than in women and lower in taller people, with no link to age. A person's own frequency stayed constant across ten sessions.

In practice, this means some people will feel best at 5.5 breaths a minute and others at 6.5. The calculator lets you set the rate, and shows the length of each inhalation and exhalation. Start at six. If it feels strained, try 6.5; if it feels hurried, try 5.5. Comfort is a reasonable guide, since forcing the breath defeats the purpose.

What the evidence shows

The research has grown quickly, and the findings are encouraging but not spectacular.

• Heart rate variability rises. The meta-analysis by Laborde and colleagues, covering 223 studies, found increases in the vagally mediated part of heart rate variability during slow breathing, immediately after a session, and after programmes of several sessions, with few adverse effects expected.
• Stress and anxiety fall, by how much is debated. Goessl and colleagues pooled 24 studies and 484 people and found a large reduction in self-reported stress and anxiety compared with controls, an effect size of 0.83, while calling for better-controlled studies. A wider meta-analysis of 58 randomised trials by Lehrer and colleagues found a small to moderate effect, similar to other effective treatments, and larger against inactive controls than against active ones.
• People feel calmer. A systematic review of slow breathing in healthy people by Zaccaro and colleagues links it to more comfort, relaxation and alertness, and less anxiety. Only 15 studies met its criteria.

The cautious figure from Lehrer is the one to keep in mind. Slow breathing is not a cure for anything, and it does not treat anxiety disorders, high blood pressure or heart disease. It is a reliable way to settle the body for a few minutes, with modest benefits that build with regular use.

Where 3-6-5 comes from

Many French readers know the routine as 3-6-5: three times a day, six breaths a minute, five minutes each time. Only the middle number rests on research. We found no health authority or peer-reviewed study that sets three sessions or five minutes as a recommendation; it is a popular convention from self-help books.

The convention is still practical. Five minutes matches the NHS breathing exercise, which suggests at least five minutes, and the daily dose used in the trial by Balban and colleagues, where five minutes a day of slow, exhale-focused breathing improved mood more than mindfulness meditation over a month. Three sessions give a morning, a midday and an evening anchor. Treat it as a reasonable starting structure, not a prescription.

A five-minute method, step by step

1. Sit upright with both feet on the floor, or lie down. Rest one hand on your belly.
2. Breathe in through the nose for about five seconds, letting the belly rise rather than the shoulders.
3. Breathe out gently for about five seconds, through the nose or pursed lips.
4. Keep the breath smooth and quiet. If counting helps, count steadily from one to five each way, as the NHS suggests.
5. Continue for five minutes. A timer or a pacing app takes the counting off your mind.
6. Return to normal breathing for a few breaths before you stand up.

If you feel light-headed, make each breath smaller and gentler. If the feeling continues, stop and breathe normally.

Fitting it into a working day

The value of the method is that it fits where nothing else does.

• Before a difficult meeting: five minutes in the car or the corridor. The guide to exercise and decision-making covers what a short session of exercise adds before the same meeting.
• After a hard call: a few minutes to come back down before the next one.
• At bedtime: a quiet routine that replaces the phone. See sleep for executives.
• On a flight: it works seated, in silence, with your eyes closed.

For a wider view of methods that lower stress, from exercise to mindfulness, read reduce stress. If you wear a device that measures heart rate variability, you can see the effect of a session on your own trace; how to read that figure over time is explained in HRV.

Safety

Breathe gently, and stop if you feel dizzy, tingly or short of breath. Do not practise while driving. If you have a heart or lung condition, or panic attacks, check with your doctor before starting.

A habit worth keeping simple

The best version of coherent breathing is the one you actually do. Five minutes, morning and evening, will do more than an elaborate routine you abandon after a week. A coach can help you place it in your week alongside training, and the Club keeps the record of every session. You can create your space with one email.