The A52 Breath Method: A Narrative Review of Breathwork for Mental Health and Stress Resilience.
Abbie L Little
Stress and Health August 1, 2025 DOI: 10.1002/smi.70098 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Narrative review Randomized Peer reviewed |
|---|---|
| Interventions | Slow breathing (≤ 6 breaths per minute) Diaphragmatic breathing Nasal breathing Breath holds 5-s exhale |
| Topics | Breathwork |
| Keywords | Autonomic nervous system Humans Breathing exercises Stress, psychological Mental health Respiration Resilience, psychological Breath holding Heart rate variability Stress regulation Nasal breathing Diaphragmatic breathing Mental resilience A52 breath method |
| Key findings | The authors report that slow, nasal, diaphragmatic breathing improves vagal tone, HRV, parasympathetic activity, and emotional control while reducing cortisol, anxiety, stress, and PTSD. They propose the A52 Breath Method (5-second inhale, 5-second exhale, 2-second hold) as a theoretically grounded framework for stress resilience, arguing it may suit high-stress professions and everyday use, though they note its efficacy still needs validation in randomized controlled trials. |
Abstract
Breathwork - deliberately altering the way one breathes - has gained growing attention as an emerging non-pharmacological intervention for mental health and stress regulation. A novel yet ancient method that remains largely underexplored in the literature, breathwork requires structured, evidence-based investigation to optimize its application. This review analyses the existing literature on slow, diaphragmatic, nasal breathing and breath-holding techniques, to propose the A52 Breath Method-a theoretically grounded approach for enhancing stress resilience. A narrative review of breathwork literature was conducted that focused on the physiological and psychological mechanisms underpinning stress reduction. Medical databases were searched: 465 articles were screened and 30 studies underwent full-text review. Studies examining slow breathing (≤ 6 breaths per minute), diaphragmatic activation, nasal breathing, and breath holds were analyzed for their effects on autonomic nervous system regulation, heart rate variability (HRV), and psychological resilience. The findings indicate that slow, nasal, diaphragmatic breathing significantly improves vagal tone, HRV, parasympathetic activity, and emotional control, while reducing cortisol, anxiety, stress, and PTSD. The integration of these elements in the 5-s inhale, 5-s exhale, 2-s hold pattern (A52 Breath Method) provides a structured approach to breathwork with potential applications in high-stress professions, including emergency responders, military personnel, healthcare workers, and everyday life. The A52 Breath Method represents a novel, evidence-informed breathwork framework designed to optimize stress regulation. Future research should validate its efficacy through randomised controlled trials, particularly in populations exposed to chronic and acute stress. This conceptual model has the potential to inform clinical and occupational interventions for mental health and stress resilience.
Comparable studies
Other narrative reviews on breathwork, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Coupling of respiration and attention via the locus coeruleus: Effects of meditation and pranayama | 2018 | Review with original findings | |
| High ventilation breathwork practices: An overview of their effects, mechanisms, and considerations for clinical applications. | 2023 | Review | |
| Breathwork in body psychotherapy: Towards a more unified theory and practice | 2011 | Review | |
| A Practitioner’s Guide to Breathwork in Clinical Mental Health Counseling | 2020 | Review | |
| Bhramari Pranayama as an aid to meditation: A review of classical yoga texts | 2020 | Review |
Citations in the library
Cites 5
- Brief structured respiration practices enhance mood and reduce physiological arousal Cell Reports Medicine 2023
- Slow breathing for reducing stress: The effect of extending exhale. Complementary Therapies in Medicine March 5, 2023
- Breathwork Interventions for Adults with Clinically Diagnosed Anxiety Disorders: A Scoping Review. Brain Sciences February 2, 2023
- Effect of breathwork on stress and mental health: A meta-analysis of randomised-controlled trials. Scientific Reports January 9, 2023
- Mechanistic pathways of mindfulness meditation in combat veterans with posttraumatic stress disorder Journal of Clinical Psychology January 21, 2016