Osman, Rowa

Breathing is a physiological process that extends beyond gas exchange, linking neural, cardiovascular, glymphatic, and autonomic systems. This narrative review summarizes how breathing-based practices modulate physiological processes in the body and brain, emphasizing their applicability in clinical care. Regulating the pace and depth of breathing, particularly with relaxed exhalation, may engage vagal pathways that lower heart rate and blood pressure and promote a shift toward increased parasympathetic tone relative to sympathetic activity. Neuroimaging studies show that controlled breathing reduces activity in stress-related brain regions while enhancing networks supporting calm attention and emotional steadiness. Changes in breathing depth also influence cerebrospinal fluid movement, though direct evidence of waste clearance in humans is lacking. This review identifies populations requiring caution, including individuals with panic symptoms, significant cardiopulmonary disease, or pregnancy. Clinicians should distinguish between breathing-only and multimodal protocols when interpreting research findings, as combined interventions preclude attribution of benefit to breathing alone. Study design quality, particularly the use of active rather than waitlist controls, should inform how effect sizes are interpreted. Breathing practices are not a replacement for medical treatment but may represent accessible, low-cost adjuncts for stress reduction and cardiovascular regulation.

Introduction Burnout among healthcare professionals remains a critical public health issue linked to impaired cognition, emotional exhaustion and diminished clinical performance. Structured breathing practices have demonstrated promise in improving autonomic regulation and cerebral oxygenation, yet their feasibility, acceptability and implementation in real-world healthcare settings remain underexplored. Objectives This single-arm pilot feasibility trial aims to evaluate the feasibility, acceptability and implementation appropriateness of a structured breathing-based intervention for healthcare professionals across community-based Mayo Clinic Health System (MCHS) sites. Secondary objectives include assessing usability and engagement with the mobile breathing platform, while exploratory analyses will describe magnitude of variability and feasibility of collecting psychological and cerebral haemodynamic measures. This study will commence in November 2025 and is expected to be completed by June 2026. Methods and analysis A total of 40 clinicians (MD/DO/MBBS/PA) and nurses reporting moderate or greater burnout will be enrolled across four MCHS sites. Participants will complete a 4-month structured breathing programme delivered primarily online, supported by a mobile application for practice tracking. Assessments will occur at baseline, 2 months and 4 months, with functional near-infrared spectroscopy (fNIRS) measures of cerebral oxygenation collected at baseline and 4 months in a population subset. Primary outcomes include (1) recruitment yield, retention and adherence rates; (2) acceptability and participant satisfaction (survey and qualitative feedback); and (3) implementation appropriateness measured by the Acceptability of Intervention Measure (AIM), Intervention Appropriateness Measure (IAM) and Feasibility of Intervention Measure (FIM). Secondary outcomes include digital engagement and usability through mobile analytics and the System Usability Scale. Exploratory outcomes are psychological indicators (burnout, depression, anxiety, perceived stress, sleep, fatigue, professional fulfilment and resilience) and physiological endpoints (fNIRS). Analyses will be descriptive, summarising feasibility metrics with 95% CIs. Progression criteria (recruitment≥75%, retention≥80%, adherence≥70%, AIM/IAM/FIM≥4.0) will determine readiness for a definitive hybrid effectiveness–implementation trial. Ethics and dissemination The study is approved by the Mayo Clinic Institutional Review Board (IRB # 25-009320). All participants will provide informed consent. Study procedures ensure confidentiality, cultural sensitivity and participant safety. Data will be securely stored in REDCap and disseminated through peer-reviewed publications and scientific conference Trial registration number NCT07218458 .

Abstract Introduction Burnout among healthcare professionals remains a critical public health issue linked to impaired cognition, emotional exhaustion, and diminished clinical performance. Structured breathing practices have demonstrated promise in improving autonomic regulation and cerebral oxygenation, yet their feasibility and acceptability in real-world healthcare settings remain underexplored. Objectives This single-arm pilot feasibility trial aims to evaluate the feasibility, acceptability, and implementation appropriateness of a structured breathing-based intervention for healthcare professionals across community-based Mayo Clinic Health System (MCHS) sites. Secondary objectives include assessing usability and engagement with the mobile breathing platform, while exploratory analyses will examine preliminary signals of change in psychological well-being and cerebral hemodynamics. Methods and Analysis A total of 40 physicians and nurses reporting moderate or greater burnout will be enrolled across four MCHS sites. Participants will complete a four-month structured breathing program delivered primarily online, supported by a mobile application for practice tracking. Assessments will occur at baseline, 2 months, and 4 months, with optional functional near-infrared spectroscopy (fNIRS) measures of cerebral oxygenation collected at baseline and 4 months in a subset. Primary outcomes include (1) recruitment yield, retention, and adherence rates; (2) acceptability and participant satisfaction (survey and qualitative feedback); and (3) implementation appropriateness measured by the Acceptability of Intervention Measure (AIM), Intervention Appropriateness Measure (IAM), and Feasibility of Intervention Measure (FIM). Secondary outcomes assess digital engagement and usability through mobile analytics and the System Usability Scale (SUS). Exploratory outcomes evaluate psychological indicators—burnout, depression, anxiety, perceived stress, sleep, fatigue, professional fulfillment, and resilience—and physiological endpoints (fNIRS). Analyses will be descriptive, summarizing feasibility metrics with 95% confidence intervals. Progression criteria (recruitment ≥75%, retention ≥80%, adherence ≥70%, AIM/IAM/FIM ≥4.0) will determine readiness for a definitive hybrid effectiveness–implementation trial. Ethics and Dissemination The study is approved by the Mayo Clinic Institutional Review Board (IRB # 25-009320). All participants will provide informed consent. Study procedures ensure confidentiality, cultural sensitivity, and participant safety. Data will be securely stored in REDCap and disseminated through peer-reviewed publications and scientific conference ClinicalTrials.gov ID The study has been prospectively registered at ClinicalTrials.gov (Identifier NCT07218458 ). Strengths and Limitations Evaluates a structured breathing-based intervention using both subjective and objective indicators of feasibility, including recruitment, retention, adherence, and implementation appropriateness. Integrates mobile application analytics with standardized implementation measures (AIM, IAM, FIM) to capture digital engagement and real-world usability. Incorporates functional near-infrared spectroscopy (fNIRS) to explore physiological mechanisms underlying burnout recovery, linking cerebral oxygenation to behavioral outcomes. Conducted across diverse community-based Mayo Clinic Health System sites, enhancing ecological validity and relevance to decentralized clinical settings. Limitations include the single-arm, region-restricted design, modest sample size, and reliance on volunteer participants, which constrain generalizability and preclude causal inference; exploratory outcomes are intended to guide future trial refinement.