Polyvagal Theory and Somatics: What They Actually Mean and Why They Matter

12/04/2026

You have probably heard the words polyvagal and somatic a lot lately. They have gone from academic terminology to wellness buzzwords in the space of about five years, which means they now get used to describe everything from expensive retreats to Instagram breathing exercises.

That is a bit of a shame, because the underlying ideas are genuinely useful. They are not trends. They are a framework for understanding why your body responds the way it does under stress, and why telling yourself to calm down rarely works.

This is the plain version. No jargon where it can be avoided. No upselling you on a particular practice before you understand what you are even buying into.

Where Polyvagal Theory Comes From

Dr Stephen Porges first presented Polyvagal Theory in 1994 while researching the autonomic nervous system. The word polyvagal refers to the vagus nerve, the longest cranial nerve in the body, which connects the brainstem to most of the major organs including the heart, lungs, and gut.

What Porges proposed, and what has since accumulated a significant body of supporting research, is that the autonomic nervous system does not operate as a simple two-state dial between stressed and relaxed. It operates across three hierarchical states, each associated with different physiological patterns and different types of behaviour. Understanding those three states is the foundation of everything that follows.

The Three States

Ventral vagal: safe and social

This is the state most people mean when they talk about feeling regulated. The ventral vagal system, the newest part of the autonomic nervous system in evolutionary terms, governs social engagement. When it is active, your heart rate is steady, your breathing is easy, your voice has prosody, your facial muscles are relaxed, and you are able to connect with other people without effort. You can think clearly. You can take in new information. You can be present.

This is not a luxury state. It is the baseline from which all productive functioning happens.

Sympathetic: mobilisation

When the nervous system detects threat, it activates the sympathetic branch. This is the fight-or-flight response most people are familiar with: elevated heart rate, muscle tension, rapid shallow breathing, narrowed focus, heightened alertness. In a genuine emergency, it is exactly what you need. The problem is that the nervous system cannot reliably distinguish between a physical threat and a deadline, a difficult conversation, or an inbox full of unread messages. For many people in high-pressure environments, sympathetic activation becomes the default rather than the exception.

Dorsal vagal: shutdown

The oldest branch of the vagal system. When the threat feels inescapable or overwhelming, the nervous system can shift into a dorsal vagal state: a kind of physiological collapse. Heart rate drops, energy drains, cognitive function becomes foggy, and the person feels numb, disconnected, or unable to act. This is sometimes described as the freeze response, though it is distinct from the sympathetic freeze that occurs when the system is overloaded with activation. Dorsal shutdown is the nervous system's last-resort protective mechanism. In the right context, it is adaptive. Sustained over time, particularly in people with a history of chronic stress or trauma, it can present as depression, dissociation, or profound exhaustion.

Why This Framework Is Useful

The reason polyvagal theory has resonated so widely is that it gives people language for something they have been experiencing but could not explain.

The person who knows intellectually that they are safe but cannot stop their heart from racing. The person who shuts down completely in conflict rather than being able to speak. The person who is exhausted but wired, unable to rest even when they get the opportunity. These are not character flaws or failures of willpower. They are nervous system states operating exactly as designed, just in a context where the design is no longer serving the person.

That reframe matters. A lot of people spend years trying to think their way out of states that are not primarily cognitive. Polyvagal theory explains why that approach has limits, and points toward what might actually work instead.

What Somatics Means

Somatics comes from the Greek word soma, meaning body. Somatic approaches to therapy and wellbeing are those that work with the body directly, rather than primarily through cognitive processing.

This does not mean ignoring the mind. It means recognising that the nervous system lives in the body, that threat responses are stored as physical patterns, and that lasting regulation often requires working at that physical level rather than only talking about it.

Somatic practices include a broad range of approaches: breathwork, body-based movement, therapeutic touch, scanning and tracking physical sensation, and practices designed to build the capacity to tolerate and complete incomplete stress cycles. The specifics vary widely. What they share is a starting assumption that the body is not a vehicle for the brain; it is an integrated system, and the signals run in both directions.

The Neurodivergent Dimension

For people with ADHD, autism, or PDA profiles, the polyvagal framework can be particularly clarifying.

Many neurodivergent nervous systems have a lower threshold for sympathetic activation and a harder time returning to ventral vagal baseline after a threat response. Sensory environments that feel manageable to others can push a neurodivergent nervous system into sympathetic overdrive without the person fully realising what is happening. Masking, a common strategy for navigating neurotypical environments, is itself physiologically costly and sustained masking over years can contribute significantly to the kind of chronic dysregulation that eventually looks like burnout.

Somatic approaches adapted for neurodivergent nervous systems look somewhat different from standard protocols. They tend to use external rather than internal anchors, avoid demands for sustained stillness, and work with the nervous system's actual capacity on a given day rather than against it. If you have tried mindfulness and found it made things worse rather than better, this is often why. The technique was not wrong. It just was not adapted for your particular nervous system.

How to Actually Work With This

Understanding polyvagal theory is a useful starting point. But reading about nervous system states does not change them, in the same way that reading about swimming does not teach your body how to float.

Regulation is a skill that develops through practice and, critically, through experience. The ventral vagal system is particularly responsive to co-regulation: the process by which contact with another regulated nervous system helps yours find its way back to safety. This is why genuinely effective somatic work tends to happen in a relational context, not in isolation with an app.

Practices like breathwork can shift nervous system states directly by working with the physiological levers, particularly CO2 tolerance and the balance between sympathetic and parasympathetic activation. Reflexology and Indian head massage work partly through the nervous system's response to safe, intentional touch within a therapeutic relationship. Reiki works at the level of presence and subtle body awareness. The mechanism differs across modalities, but the underlying aim is the same: to give the nervous system repeated experiences of safety until ventral vagal becomes the default rather than the exception.

This takes time. It is not linear. And it is more likely to stick when it is supported by someone who understands what they are working with.

A Practical Starting Point

If you are new to this and want somewhere to begin, a few things are worth knowing.

Your breath is the most direct and accessible lever you have for shifting your nervous system state. A longer exhale than inhale reliably activates the parasympathetic branch. You do not need an app for this, though the Low Tide Calm app has a few guided options if you want structure to start with. It is free and it does not track anything. Think of it as a starting point, not a destination.

Noticing is also underrated. Simply developing the habit of asking "what state am I in right now?" without trying to change it immediately can build the kind of interoceptive awareness that makes regulation easier over time. The breathwork post on this site covers some of the physiology in more detail if you want to go deeper on that side.

And if you are finding that self-directed practice is not shifting things, that you are stuck in sympathetic overdrive or in a persistent low-energy shutdown state, that is usually a sign that the work needs a relational container. That is what in-person sessions are for.