[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"health-study-detail:100622694":3},{"organization":4,"armGroups":7,"interventions":19,"overallOfficials":18,"centralContacts":28,"locations":34,"responsibleParty":52,"collaborators":18,"id":54,"slug":55,"hasResults":56,"nctId":57,"briefTitle":58,"officialTitle":59,"acronym":60,"eligibilityCriteria":61,"healthyVolunteers":62,"sex":63,"minAge":64,"maxAge":65,"enrollmentInfo":66,"targetDuration":18,"studyType":69,"phases":70,"briefSummary":72,"conditions":73,"keywords":77,"overallStatus":37,"whyStopped":18,"lastUpdateSubmitDate":83,"lastUpdatePostDateStruct":84,"startDateStruct":87,"completionDateStruct":89,"leadSponsor":91,"locationsCount":92},{"fullName":5,"class":6},"Egas Moniz - Cooperativa de Ensino Superior, CRL","OTHER",[8,14],{"label":9,"type":10,"description":11,"interventionNames":12},"HRV Biofeedback Training","EXPERIMENTAL","Participants receive 12 individual sessions of heart rate variability biofeedback (HRV-BFB) over 4 weeks (one 12-minute session every 2 days). Training is delivered using a chest-worn ECG sensor (eSense Pulse) connected to a mobile application that provides real-time visual feedback.",[13],"Behavioral: Heart Rate Variability Biofeedback (HRV-BFB) Training",{"label":15,"type":16,"description":17,"interventionNames":18},"Control: No Intervention","NO_INTERVENTION","Participants receive no active intervention during the 4-week study intervention period and continue their usual duties and routines. They complete the same assessment schedule as the experimental group at baseline, 4 weeks, and 10 weeks. After completion of the final follow-up assessment, they are offered the opportunity to receive the HRV biofeedback training protocol.",null,[20],{"type":21,"name":22,"description":23,"armGroupLabels":24,"otherNames":25},"BEHAVIORAL","Heart Rate Variability Biofeedback (HRV-BFB) Training","Participants receive a structured heart rate variability biofeedback (HRV-BFB) training protocol delivered over 4 weeks. The intervention uses a portable chest-worn ECG sensor (eSense Pulse) connected via Bluetooth to a mobile application that provides real-time visual feedback of heart rate variability. Each participant completes 12 individual sessions of 12 minutes each (one session every 2 days). Sessions take place in a quiet room and follow a standardized format: a brief preparation phase, followed by approximately 10 minutes of guided breathing at resonance frequency (around 6 breaths per minute) using a visual breathing guide. The application displays color-coded feedback indicating how closely the participant's physiological response matches the target HRV pattern, and participants are instructed to adjust their breathing and recall positive memories to maximize time in the desired state. The aim is to increase HRV, strengthen parasympathetic activation, and improve stress and",[9],[26,27],"HRV biofeedback","Resonance frequency breathing training",[29],{"name":30,"role":31,"phone":32,"phoneExt":18,"email":33},"Paulo Chaló, PhD","CONTACT","(+351) 212 946 700","pchalo@egasmoniz.edu.pt",[35],{"facility":36,"status":37,"city":38,"state":18,"zip":18,"country":39,"countryCode":40,"cosmosGeoPoint":41,"geoPoint":46,"contacts":47},"GNR - Comando Terrritorial de Setúbal (GNR - Setubal Territorial Command Centre)","RECRUITING","Setúbal","Portugal","PT",{"type":42,"coordinates":43},"Point",[44,45],-8.8882,38.5244,{"lat":45,"lon":44},[48,49],{"name":30,"role":31,"phone":32,"phoneExt":18,"email":33},{"name":50,"role":51,"phone":18,"phoneExt":18,"email":18},"Clauda Carrilho","SUB_INVESTIGATOR",{"type":53,"investigatorFullName":18,"investigatorTitle":18,"investigatorAffiliation":18,"oldNameTitle":18,"oldOrganization":18},"SPONSOR","100622694","heart-rate-variability-biofeedback-in-security-forces-100622694",false,"NCT07386951","Heart Rate Variability Biofeedback in Security Forces","Heart Rate Variability Biofeedback in Distress Regulation and Burnout Prevention Among Security Forces","GNR-HRVB","Inclusion Criteria:\n\n1. Operational military personnel of the Guarda Nacional Republicana (GNR) performing security, patrol, criminal investigation, or road safety duties\n2. Any military rank or professional category within operational roles\n3. Age between 18 and 55 years, inclusive\n4. Both males and females\n5. Capable of providing informed consent in Portuguese language\n\nExclusion Criteria:\n\n1. Extended sick leave or medical absence\n2. Currently involved in serious disciplinary proceedings\n3. Use, modification, or initiation of psychotropic medication (including antidepressants, anti-anxiety medications, antipsychotics, mood stabilizers) within the past 6 months",true,"ALL","18 Years","55 Years",{"count":67,"type":68},50,"ESTIMATED","INTERVENTIONAL",[71],"NA","This exploratory study evaluates the effectiveness of a 12-session Heart Rate Variability Biofeedback (HRV-BFB) protocol in reducing distress and burnout while promoting psychological well-being among Portuguese National Republican Guard (GNR) professionals. Exposed to high occupational stress from unpredictable risks, shift work, and limited resources, these individuals face elevated vulnerability to chronic stress outcomes. The intervention leverages real-time HRV feedback to enhance autonomic regulation, breathing techniques, and emotional self-regulation.",[74,75,76],"Psychological Distress","Well-Being, Psychological","Burnout",[78,26,76,79,80,81,82],"Heart rate variability biofeedback","Stress management","Psychological distress","Mental health promotion","Workplace well-being","2026-02-04",{"date":85,"type":86},"2026-02-06","ACTUAL",{"date":88,"type":86},"2026-01-28",{"date":90,"type":68},"2026-08-01",{"name":5,"class":6},1]