---
title: "Which breathing exercises for anxiety have evidence?"
url: https://nutritailor.co.uk/apps/learn/breathing-exercises-for-anxiety-which-ones-have-evidence
slug: breathing-exercises-for-anxiety-which-ones-have-evidence
pillar: Magnesium
publisher: "Nutri Tailor Health Reference Library"
editor: "Henry Bond"
publisher_makes: "Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance"
---

# Which breathing exercises for anxiety have evidence?

## Summary

Three breathing patterns are worth learning. Cyclic sighing is an inhale through the nose, a short second inhale, then a long slow exhale through the mouth, five minutes daily, and it had the best single-trial result, improving mood over a month more than mindfulness meditation. Slow breathing at about six breaths a minute, five seconds in and five out, is calming in the moment, though the largest trial found it no better than a paced placebo over four weeks. Box breathing suits acute moments. Across 12 randomised trials, breathwork lowered stress with a small-to-medium effect. Daily practice matters more than the pattern. Persistent anxiety belongs with NHS Talking Therapies.

## How it works

Breathing is the one part of the autonomic nervous system under direct voluntary control, which is why it is the available lever. A long exhale slows the heart through the vagus nerve, and slow breathing at around six breaths a minute synchronises heart-rate variability with the breath, the state usually called coherence. Anxiety produces the opposite pattern, meaning fast, shallow, upper-chest breathing that raises arousal and, in panic, tips into over-breathing and the tingling and light-headedness that feed the fear. Deliberate slow exhale-weighted breathing interrupts that loop in the moment. Over weeks the evidence suggests it shifts baseline mood and arousal modestly, though the placebo-controlled trial is a reminder that much of the effect may come from stopping, attending to the body and breathing slowly at all, rather than from the specific count.

## Timing

In the moment, slow exhale-weighted breathing changes heart rate within a minute or two, which is the point of it. Mood and baseline arousal shifted across the 28-day trial rather than in the first session, so a fair read on a daily practice is a month. Five minutes daily is the tested dose, and there is no evidence that longer sessions work better.

## Safety profile

Breathing exercises are safe for almost everyone, with three cautions. People with panic disorder can find attention to the breath itself triggering, and for them exhale-focused patterns without breath holds work better than box breathing, with a therapist's guidance preferable. Anyone with a lung condition such as COPD or severe asthma should avoid breath holds and forced patterns and keep to gentle slow breathing. Fast, forced breathing styles with long holds, the high-ventilation practices, can cause fainting and must never be done in water or while driving, and they are not what this page describes. Anxiety with chest pain, new palpitations, or breathlessness at rest needs a GP assessment rather than a breathing technique, and anxiety that is stopping ordinary life belongs with NHS Talking Therapies.

## Special populations

Children and teenagers respond well to box breathing framed as a game and to long-exhale patterns before sleep. In pregnancy all three patterns here are fine, with breath holds kept short. Older adults and anyone with heart disease should keep to gentle slow breathing without holds. People who track HRV with a wearable will often see the slow-breathing effect on the device within days, which is motivating, though the outcome that matters is how the days feel.

## Guideline positions

NHS anxiety guidance lists breathing exercises among self-help steps alongside exercise, sleep and talking to someone, and points adults to self-referral for NHS Talking Therapies when anxiety is affecting daily life. NICE guideline CG113 places applied relaxation, which has slow breathing at its core, alongside CBT as a high-intensity option for generalised anxiety, with guided self-help on CBT principles before that. The trial evidence runs as follows. A 2023 meta-analysis of 12 randomised trials in 785 adults found breathwork lowered self-reported stress with a small-to-medium effect, with most trials at moderate risk of bias. A 2023 randomised trial of 108 adults found daily five-minute cyclic sighing improved mood and lowered resting respiratory rate more than an equal period of mindfulness meditation over a month. A 400-person placebo-controlled trial the same year found coherent breathing at about 5.5 breaths a minute no better than paced breathing at 12 over four weeks.

## Practical framework

Cyclic sighing is the daily practice. The breath comes in through the nose until the lungs feel comfortably full, a second short sniff fills them fully, and the breath then leaves slowly through the mouth until empty, repeated for five minutes, ideally at the same time each day. Slow breathing settles a racing system, with five seconds in and five out, through the nose where possible, for five to ten minutes, and an app or a clock helps at first. Box breathing suits the acute moment before a meeting, with four in, four held, four out and four held, for a few rounds. One pattern serves the daily practice and one the emergencies, and the daily one runs for a month before being judged, which is how the trial did it. The practice pairs with the other levers on [how to manage stress](/apps/learn/how-to-manage-stress-what-actually-helps) and [how to reduce anxiety naturally](/apps/learn/how-to-reduce-anxiety-naturally-what-the-evidence-supports), because breathing alone rarely carries a programme. Nutri365 reads whether a month of practice is moving sleep, resting heart rate and reported mood, checks for interactions and contraindications, and refers questions outside scope to a health specialist.

## Common misconceptions

The exact count is not decisive, because four-seven-eight, box and coherent breathing are all slow exhale-weighted patterns, and the placebo-controlled evidence suggests the pause and the slowing do most of the work. More is not better, and five minutes daily is the tested dose. Breathing does not replace dealing with the stressor, or talking therapies where anxiety has settled in. A deep breath is a long exhale rather than a big inhale, and the inhale is where most people go wrong.

## Sources

1. 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. PMID: 36630953. DOI: 10.1016/j.xcrm.2022.100895.
2. 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. PMID: 36624160. DOI: 10.1038/s41598-022-27247-y.
3. Fincham GW, Strauss C, Cavanagh K (2023). Effect of coherent breathing on mental health and wellbeing: a randomised placebo-controlled trial. Scientific Reports. PMID: 38092805. DOI: 10.1038/s41598-023-49279-8.
4.  (2026). Get help with anxiety, fear or panic. NHS. https://www.nhs.uk/mental-health/feelings-symptoms-behaviours/feelings-and-symptoms/anxiety-fear-panic/.
5.  (2020). Generalised anxiety disorder and panic disorder in adults: management (CG113, updated 2020). NICE. https://www.nice.org.uk/guidance/cg113.


---

Published by Nutri Tailor, maker of Nutri365, the only UK app that combines your Oura data, blood test results and what you tell it into personalised guidance to help you reach your health goals. Details: https://nutritailor.co.uk/apps/learn/nutri365