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How breathing works · 3 min read

How often should you do breathing exercises, and for how long?

How many times a day, how many minutes, how many rounds? There are no fixed rules. But the studies show what range breathing exercises were tested in, and they give a surprising answer to whether more is better.

By Published

Key takeaways

  • Studies tested one minute in the moment, five minutes a day for a month, and fifteen minutes every evening for 30 days.
  • More isn’t clearly better: in a meta-analysis, the effect on stress didn’t depend on how long or how often people practiced.
  • Sticking with it counts: in the Stanford study, the mood benefit of sighing grew with the number of days people practiced.
  • My suggestion: a short exercise when things get tight, plus five to fifteen calm minutes on most days.

How long people practiced in the studies

The studies behind my articles used very different amounts of practice:

Bars showing minutes per session: one minute in everyday life, about six minutes once in the lab, five minutes a day for 28 days, fifteen minutes every evening for 30 days. Everyday life, in the moment 1 min · once 4-7-8 in the lab ≈ 6 min · once Stanford, at home 5 min · 28 days In bed at night 15 min30 days
  1. One minute of sighing or box breathing when things got tense in everyday life.1
  2. Three short sets of 4-7-8 with breaks in between, about six minutes of breathing in total.2
  3. Five minutes a day at home, for a month.3
  4. Fifteen minutes of slow breathing every evening, for 30 days.4
Bar length shows minutes per session. All of these tested the techniques, not the nowa app.

All four approaches showed measurable effects, on mood, in-the-moment anxious feelings, heart rate variability or how people rated their own sleep. You can’t read a single right dose from that.

Is more better?

A meta-analysis of twelve randomized trials checked exactly that. It found no statistically clear link between the effect on stress and the total amount of practice, the number of sessions or how often people practiced. The relationships pointed in the expected direction but weren’t significant.5 Single sessions can already change something, too: slow breathing raises heart rate variability during the exercise, right after it and after several sessions.6

On the other hand, sticking with it pays off. In the Stanford study, the mood benefit of cyclic sighing grew the more days people had practiced. On average, they practiced on just under 20 of 28 days, for about six minutes a day.3

Short and regular beats long and rare. As far as we know today, the effect doesn’t hinge on that extra minute.

My suggestion

  • When things get tight: one to three physiological sighs, or a minute of calm breathing.
  • As a habit: five minutes on most days, ideally tied to something you already do, like brushing your teeth.
  • To wind down at night: ten to fifteen minutes in bed, no screen, as in these breathing exercises for sleep.
  • Skipped days are just skipped. Why streaks can actually get in the way is in habit tracking without streaks.

That’s a range drawn from the studies, not a prescription. More important than any number is that the exercise feels good.

Can you overdo it?

Hardly, with calm exercises, as long as you breathe gently. Breathing very deeply or quickly means breathing too much: you may feel dizzy or notice tingling in your hands or lips. Then breathe normally for a while. Never do exercises with breath holds in or near water, or while driving.

Frequently asked questions

How many times a day should I do breathing exercises?
Short ones like the sigh, as often as you like. For a calm exercise, once a day is enough; the Stanford study used five minutes a day.3
Morning or night?
Either works. One study tested an evening routine of fifteen minutes of slow breathing.4 In the morning or at lunch, a shorter exercise makes a good break.
How soon will I notice anything?
In the Stanford study, people already felt less anxious and in a better mood right after each daily session, and the mood benefit grew over the weeks.3
Do I have to practice every day?
No. People in the Stanford study practiced on just under 20 of 28 days on average.3 Regular doesn’t mean without gaps.

This article shares general information about breathing exercises for relaxation and well-being. It is not medical advice and does not replace diagnosis or treatment by a licensed professional. nowa is a wellness app. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. Only practice while it feels comfortable. If you feel dizzy or short of breath, or notice a racing heart, chest pain, or strong anxiety, stop and breathe normally. If you have a medical condition (for example a heart or lung condition, or epilepsy) or are pregnant, talk to your doctor or midwife before trying new breathing exercises. Never change prescribed treatment on your own.

Sources

  1. Riedl EM, Bracklo T, Wimmer K, Perzl J, Gdynia HJ, Thomas J, Surzykiewicz J (2026). Simply breathing anxiety away? A pilot, just-in-time ecological momentary intervention study of one-minute cyclic sighing versus box breathing as tools for acute anxiety reduction and attention promotion in real life. Anxiety, Stress, & Coping 39(5):608–622. doi.org/10.1080/10615806.2026.2659809
    Preregistered real-life pilot study, 47 students
  2. Vierra J, Boonla O, Prasertsri P (2022). Effects of sleep deprivation and 4-7-8 breathing control on heart rate variability, blood pressure, blood glucose, and endothelial function in healthy young adults. Physiological Reports 10(13):e15389. doi.org/10.14814/phy2.15389
    Lab study, 43 healthy young adults, single session
  3. Balban MY, Neri E, Kogon MM, Weed L, Nouriani B, Jo B, Holl G, Zeitzer JM, Spiegel D, Huberman AD (2023). Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine 4(1):100895. doi.org/10.1016/j.xcrm.2022.100895
    Randomized controlled trial, online, 108 healthy adults, one month
  4. Laborde S, Hosang T, Mosley E, Dosseville F (2019). Influence of a 30-day slow-paced breathing intervention compared to social media use on subjective sleep quality and cardiac vagal activity. Journal of Clinical Medicine 8(2):193. doi.org/10.3390/jcm8020193
    Randomized trial, 64 healthy young adults, 30 days
  5. Fincham GW, Strauss C, Montero-Marin J, Cavanagh K (2023). Effect of breathwork on stress and mental health: a meta-analysis of randomised-controlled trials. Scientific Reports 13:432. doi.org/10.1038/s41598-022-27247-y
    Meta-analysis, 12 randomized trials on stress with 785 adults
  6. Laborde S, Allen MS, Borges U, Dosseville F, Hosang TJ, Iskra M, Mosley E, Salvotti C, Spolverato L, Zammit N, Javelle F (2022). Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and a meta-analysis. Neuroscience & Biobehavioral Reviews 138:104711. doi.org/10.1016/j.neubiorev.2022.104711
    Systematic review and meta-analysis, 223 studies

All sources last checked on October 28, 2026. Spotted a mistake? Write to support@nowabreathing.com and I’ll fix it and note the change here.