Breathwork, journaling, and cold exposure are real tools backed by real evidence. Most of them work in the right state. The state you're in determines which ones can actually reach you, and reaching for the wrong tool at the wrong time can deepen dysregulation rather than reduce it.
This guide starts with state identification, and everything else follows from that.
The Nervous System Field Guide
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New here? Start with the free 3 States Cheat Sheet — it's the foundation this guide builds on.
The problem
The nervous system self-regulation field has no shortage of tools: breathwork, cold exposure, journaling, somatic movement, EFT, vagal toning protocols. Most of them are real, most are backed by decent evidence, and most will do nothing — or actively make things worse — if you reach for them from the wrong state.
The sequencing is where most approaches break down.
Your autonomic nervous system runs in three distinct circuits. Which one is active determines what is physiologically accessible to you. In full sympathetic activation, flooded, reactive, heart pounding, the prefrontal cortex goes offline. The region that plans, reasons, and executes a breathing protocol is suppressed, not temporarily distracted. This is literal physiology, not a metaphor for being stressed.
In dorsal vagal shutdown, flat, numb, unable to move, the problem runs the other direction. There is not enough activation for most tools to create traction. You attempt the breathing exercise, feel nothing shift, and end up feeling worse for having tried.
The state you're in determines which tools are available to you. Using the wrong tool in the wrong state doesn't just fail to help. It can deepen dysregulation. Everything in this guide is organised around that principle.
A guide that starts with state identification, in plain language, and then maps each state to the specific tools that work within it hasn't really existed in this space. This is that guide.
The framework
Dr. Stephen Porges's polyvagal theory identified three distinct circuits in the autonomic nervous system. They evolved in sequence and activate in reverse order under threat. Where you sit on that ladder determines which tools can reach you.
These circuits activate hierarchically, descending under threat and ascending during recovery. You cannot skip rungs. Moving from shutdown to regulated requires passing through activation first, which is how the nervous system is wired. Understanding this sequence stops you from attempting tools that have no access point from where you currently are.
What's inside
Your autonomic nervous system explained — what neuroception is, why you can't think your way out of an autonomic state, and why mindset tools work downstream of physiology rather than upstream of it
The polyvagal map in full — the three circuits, the autonomic ladder, and the evolutionary logic that explains why you respond the way you do under different kinds of stress
State identification from body cues — a complete physical signal guide for all three states: breath, heart rate, digestion, muscle tone, perception, and social engagement. Physical cues are used rather than cognitive assessment, because cognitive analysis tends to be the first thing that goes offline
Tools for each state — 35+ total — each tool is matched to the state it works in, the state it backfires in, and the mechanism behind both. You stop guessing which tool to reach for and start reading the map instead
The transition path section — why you can't move from shutdown to regulated in one step, what the intermediate stages feel like, and how to work with the sequence rather than against it. This is where most regulation attempts break down
Build your personal protocol — fill-in pages for documenting your own state signals, your most accessible tools per state, and pattern observations over time. The guide becomes a personalised reference rather than a generic one
Quick-reference summary — a single-page state-tool overview designed to be found fast when you're already dysregulated and reading through the full guide isn't possible
Sources and research cited — everything in this guide is grounded in published neuroscience. References are listed so you can go deeper where it matters to you
For you if
Where this fits
If you're new here, the free 3 States Cheat Sheet is the starting point, giving you the three-state overview at a glance. The Dysregulation First Aid Workbook is the protocol for the acute moment, when you're already flooded and need to start from the floor.
The Nervous System Field Guide goes deeper than both. It covers the science, the full state profiles, the tool library, and the personal protocol system. If the Cheat Sheet is the map and the Dysregulation First Aid Workbook is the emergency kit, the Nervous System Field Guide is the reference you keep returning to.
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The free 3 States Cheat Sheet is the starting point if you want to read it first. No email required.