Breathwork studies, tips and resources
Every tip and study on this site, each in one line you can pass on. Tap Copy and it goes in a message with its link.
Tips to pass on
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If you can, start with the free part: breathe through your nose, move most days, and let a slow sigh out when stress spikes.
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Two breaths in through the nose, one long breath out through the mouth. Five minutes a day of it lifted mood more than meditation in a month-long trial.
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Five minutes a day of a slow pattern, kept up for four weeks, is the best tested dose.
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Never practice breath holds or fast breathing in or near water. The urge to breathe goes quiet while your oxygen keeps falling.
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Lightheaded on a slow pattern? Breathe smaller and shorten the holds.
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Tingling hands mean carbon dioxide fell a long way. Slow down and it passes.
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Breathing hard doesn't add oxygen. At rest your blood is already 95 to 100 percent full.
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A 4-4-4-4 box takes 16 seconds, so box breathing runs at 3.75 breaths a minute.
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Dr. Andrew Weil teaches 4-7-8 as four breaths at a time, at least twice a day, for the first month.
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Judge a practice by your mood before and after each session. A month of daily practice didn't move resting HRV in two trials.
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Skip fast rounds and long holds if you're pregnant or have epilepsy, heart disease or blood pressure you take medicine for.
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Humming made the air from the nose carry 15 times more nitric oxide in 10 people.
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Thirty hard breaths a day through a breathing trainer brought the top blood pressure number down 9 points in six weeks in one trial.
The studies
Slow breathing and stress
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2023. Five minutes a day for a month of cyclic sighing lifted good moods more than mindfulness meditation, and it was the only pattern clearly ahead.
Balban and others, Stanford, 108 adults
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2023. Breathing practices lowered stress by a small to medium amount.
Fincham and others, 12 trials, 785 adults
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2023. Breathing at 5.5 a minute every day did no better than a normal 12 a minute when both groups expected it to help.
Fincham and others, Sussex, 400 adults
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2026. Four weeks of slow breathing lowered stress and anxiety. A personal resonance pace did no better than a plain six a minute, and neither raised resting HRV.
Sumińska and others, Warsaw, 88 adults
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2020. For most adults, the heart rate swings most with each breath somewhere between 4.5 and 6.5 breaths a minute.
Shaffer and Meehan, a practical guide
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2014. At six breaths a minute, a short in-breath and a long out-breath felt more relaxing than the reverse.
Van Diest and others, 30 people
Fast breathing and Wim Hof
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2014. After 10 days of breathing, cold and meditation training, an injected bacterial toxin gave the trained men milder flu-like symptoms.
Kox and others, Nijmegen, 24 young men
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2022. The breathing on its own raised adrenaline, and breathing plus cold training calmed inflammation the most.
Zwaag and others, Nijmegen, 88 men
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2024. The trials of the Wim Hof Method were rated very low quality.
Almahayni and Hammond, a review of the method's trials
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2021. Three rounds of 30 deep breaths took the carbon dioxide in their breath from 40 down to 19 mmHg on average.
Citherlet and others, 15 runners
Connected breathing
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2025. Carbon dioxide averaged about 20 mmHg across a session, and mystical-experience scores were about the same as a standard dose of psilocybin.
Havenith and others, Germany, 61 experienced breathers
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2022. Sudarshan Kriya did about as well on PTSD symptoms as a standard talk therapy.
Bayley and others, Palo Alto VA, 85 veterans
Lungs, blood pressure and the nose
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2024. Breathing techniques left people with serious lung illness a little less breathless, with a better quality of life.
Burge and others, 73 trials, 5,479 people
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1998. Those who learned the Buteyko method used much less reliever inhaler over three months, though their lung tests didn't change.
Bowler and others, Brisbane, 39 people with asthma
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2021. Thirty hard breaths a day through a breathing trainer for six weeks brought the top blood pressure number from 135 down to 126.
Craighead and others, Colorado, 36 adults aged 50 to 79
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2014. Breathing-pacer devices lowered blood pressure no more than music or a fake device did.
Landman and others, three blinded trials, 105 people
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2024. Alternate nostril breathing lowered the top blood pressure number about 7 points, though the trials disagreed a lot.
Nam and others, six small trials
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2002. Humming made the air from the nose carry 15 times more nitric oxide.
Weitzberg and Lundberg, Karolinska, 10 people
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2025. All 10 studies were of poor quality, and four warned of a risk of suffocation when the nose is blocked.
Rhee and others, a review of mouth taping
Breath holds and safety
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2015. 16 people blacked out underwater from breath holding. The 4 who died were all skilled swimmers aged 17 to 22 who had hyperventilated first.
Boyd and others, CDC MMWR, New York, 1988 to 2011
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2024. Their BOLT breath hold scores had no link to their sprint or endurance test results.
Kowalski and others, 49 elite speedskaters
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2016. About 200 brain cells switch on a sigh, the double breath that reopens collapsed air sacs every few minutes.
Li and others, UCLA and Stanford, in mice
Resources
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Relaxation Techniques: What You Need To Know The US government's summary of slow breathing and other relaxation methods, updated June 2021.
National Center for Complementary and Integrative Health
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Breathing Exercises for Better Lung Health Pursed-lip and belly breathing the way lung rehab teams teach them, updated June 2026.
American Lung Association
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Exercise and Lung Health Why regular exercise leaves you less out of breath, updated June 2026.
American Lung Association
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How to breathe when you are short of breath Pursed-lip breathing step by step, reviewed January 2026.
MedlinePlus, US National Library of Medicine
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Hyperventilation What fast breathing does and when it needs the emergency room, reviewed July 2026.
MedlinePlus, US National Library of Medicine
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Vital Signs The normal resting breathing rate for adults, 12 to 18 a minute, updated March 2023.
Cleveland Clinic
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4-7-8 Breath Dr. Weil's own instructions for 4-7-8.
Andrew Weil Center for Integrative Medicine, University of Arizona
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Safety warnings The method's own rules: never in water or while driving, and not while pregnant.
Wim Hof Method
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Breathing exercises for stress A five-count belly breathing exercise for stress, reviewed June 2026.
NHS (UK)
