OVERRIDE is a wellness and psychoeducation tool developed by EMERGENZ Corporation to support first responders and public safety personnel in the United States and Canada.
What OVERRIDE Is
A structured, evidence-informed resource for stress awareness, cognitive reset, and psychological self-support after occupational exposure. Content is based on peer-reviewed research.
What OVERRIDE Is Not
OVERRIDE is not a clinical intervention, mental health treatment, or substitute for professional medical or psychological care. Use of OVERRIDE does not create a therapeutic, clinical, or confidential relationship of any kind.
No Confidentiality
OVERRIDE does not offer confidential communications. Nothing entered or selected is protected by therapist-client privilege. You remain responsible for your own mandatory reporting obligations under applicable law.
Voluntary Use
Use of OVERRIDE is voluntary. No employer, agency, or supervisor has access to your individual session data or responses.
Data & Privacy
OVERRIDE does not collect, store, or transmit personally identifiable information. No data is retained after you close the tool. No cookies are used for tracking.
Do Not Use OVERRIDE If You Are Currently Experiencing
Active thoughts of suicide or self-harm · A psychiatric emergency · Acute intoxication · Symptoms of psychosis or dissociation · A medical emergency. If any of these apply, please use the crisis resources below.
If You Are In Crisis — Support Is Available Now
🇺🇸 United States — 988 Suicide & Crisis Lifeline Call or text 988 · 24/7 · Free · Confidential
Provincial Lines:
ON: 416-408-4357 · BC: 1-800-784-2433 · AB: 1-877-303-2642
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All provinces: talksuicide.ca/crisis-lines
OVERRIDE is designed for use in the United States and Canada. Users outside these regions should consult locally appropriate resources and clinical standards.
Cyclic sighing, stress physiology, and physiological self-regulation. This module provides the clinical evidence and practice behind OVERRIDE's Fast Reset protocol.
Learning Objectives
1. Explain the autonomic nervous system and how prolonged sympathetic activation contributes to cognitive and emotional fatigue.
2. Describe the cyclic sigh protocol — two brief nasal inhales followed by one longer passive oral exhale — and its physiological rationale.
3. Summarize the evidence: a randomized trial found cyclic sighing improved mood and reduced respiratory rate compared with mindfulness meditation.
4. Demonstrate safe practice of cyclic sighing while recognizing contraindications.
5. Develop a personal plan for integrating breathwork into post-incident processing.
Time: 20–30 minutes · Credit: · Format: Interactive web module with guided practice
Section 1 of 5
Autonomic Stress
Your autonomic nervous system has two primary branches. Understanding them is the foundation for everything in this module.
Autonomic Nervous System
Sympathetic Fight or flight
Parasympathetic Rest and digest
↓
Vagus Nerve Primary parasympathetic pathway
The sympathetic nervous system mobilizes your body for action — elevated heart rate, rapid breathing, heightened alertness. This is essential during a call. The problem begins when it doesn't turn off.
Chronic sympathetic activation after repeated high-stress incidents leads to hyperarousal, impaired judgment, and emotional exhaustion. Your body stays in threat mode even when the threat is gone.
The parasympathetic nervous system — activated primarily through the vagus nerve — brings you back down. It slows heart rate, deepens breathing, and restores the cognitive bandwidth you need to think clearly.
Key Finding
Cognitive load theory research in emergency medicine found that mild stress can aid learning, but high or prolonged stress impairs complex reasoning. Novice providers are especially vulnerable to cognitive overload under sustained sympathetic activation.
Schoenfeld et al., 2021 — Cognitive Load Theory in Emergency Medicine
The goal of autonomic reset techniques is simple: deliberately activate the parasympathetic system to create a window of restored function between incidents.
Section 2 of 5
The Cyclic Sigh
The cyclic sigh is a specific breathing pattern that maximizes parasympathetic activation through extended exhalation. Here's the mechanism:
Cyclic Sigh Sequence
Inhale 1 Short nasal inhale
→
Inhale 2 Second short nasal inhale
→
Exhale Long passive oral exhale
Why two inhales? The double inhale fully inflates the alveoli (tiny air sacs in the lungs), maximizing gas exchange. Many alveoli collapse during shallow stress breathing — the second inhale reopens them.
Why the long exhale? Exhalation activates the parasympathetic nervous system via vagal afferents. The longer the exhale relative to the inhale, the stronger the vagal response. This is measurable — heart rate drops on exhale, rises on inhale.
Clinical Evidence
A randomized controlled trial of 114 adults compared daily five-minute breathwork exercises with mindfulness meditation. Exhale-focused cyclic sighing produced the greatest improvements in mood and the largest reductions in respiratory rate compared with all other techniques, including box breathing and hyperventilation-based breathwork.
Balban MY, Neri E, Kogon MM, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine. 2023;4(1):100895.
Important context: The study participants practiced daily for 28 days. Benefits accumulated over time. A single session may not produce the same magnitude of effect — but the physiological mechanism (vagal activation via extended exhalation) operates immediately.
Section 3 of 5
Guided Practice
Now practice the cyclic sigh protocol. You'll do five cycles — about 60 seconds total. Follow the visual and text cues.
Contraindications: If you have uncontrolled asthma, recent chest/abdominal surgery, or are currently experiencing respiratory distress, skip this exercise. Consult a clinician before practicing breathwork regularly.
5
Ready
Tap start when you're ready. Sit upright. Relax your shoulders.
Pay attention to how your body feels before and after. Notice any changes in heart rate, shoulder tension, or mental clarity.
Section 4 of 5
Integration & Caution
Cyclic sighing is most valuable when it becomes a routine, not a rescue. Here's how it maps to OVERRIDE's framework:
When to Use It
Fast Reset — Available on every screen in OVERRIDE. Use it between calls, after a difficult transport, or any time your system is running hot.
After Action output — When the tool tells you to ground yourself, cyclic sighing is the physiological component.
Load Check output — At moderate and high load, the protocol calls for cyclic sighing as the first step before any other intervention.
Preventive practice — Daily five-minute sessions build cumulative resilience. The evidence is strongest for regular practice, not one-time use.
What breathwork is not: Breathwork is not a substitute for peer support, clinical care, or professional mental health treatment. It is a physiological tool for self-regulation — one component of a broader wellness strategy. If you are experiencing persistent intrusive memories, hyperarousal, or avoidance that interferes with daily life, contact your agency's peer support team, EAP, or a mental health professional.
Resilience Evidence
A 2025 systematic review of resilience interventions for disaster rescue workers found that programmes focusing on psychoeducation, stress management, coping strategies, mindfulness, and psychological first aid (1–24 hours of training) improved individual resilience and reduced burnout. Breathwork falls within the stress management and coping strategy domains.
Mao et al., 2025 — Resilience interventions for disaster rescue workers: A systematic review.
Section 5 of 5
Knowledge Check
Answer the following to confirm understanding. You'll receive immediate feedback on each question.
These questions are for reflection and learning — not assessment. There are no wrong answers recorded. Select the option that best matches your understanding, then read the evidence note.
Self-Reflection
Personal Plan
Take a moment to think about how you'll integrate what you've learned. This is for you — nothing is recorded or transmitted.
When will you use cyclic sighing?
What did you notice during the practice?
Any concerns or barriers?
Works Cited
References
1
Balban MY, Neri E, Kogon MM, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine. 2023;4(1):100895. doi:10.1016/j.xcrm.2022.100895 · PMID 36630953
2
Fincham GW, Strauss C, Montero-Marin J, Cavanagh K. Effect of breathwork on stress and mental health: A meta-analysis of randomized-controlled trials. Scientific Reports. 2023;13(1):432. doi:10.1038/s41598-022-27247-y · PMID 36720910
3
Zaccaro A, Piarulli A, Laurino M, et al. How breath-control can change your life: A systematic review on psycho-physiological correlates of slow breathing. Front Hum Neurosci. 2018;12:353. doi:10.3389/fnhum.2018.00353 · PMID 30245619
4
Mao Y, et al. Resilience interventions for disaster rescue workers: A systematic review. 2025. PubMed PMID 40390091
National Highway Traffic Safety Administration (NHTSA). National EMS Education Standards. 2021. ems.gov · PDF
✓
Module Complete
You've completed Module 1: Autonomic Reset. You now understand the physiology behind cyclic sighing, the evidence supporting it, and how to integrate it into your practice.
Standards: Mapped to National EMS Education Standards (2021).
Need immediate support? 🇺🇸 US — Call or text 988 🇨🇦 Canada — Call 1-833-456-4566
Text 45645 (4 PM–midnight ET)
ON 416-408-4357 · BC 1-800-784-2433 · AB 1-877-303-2642 · QC 1-866-277-3553 All provincial lines