Polyvagal Theory and Exercises: Name Your State, Then Shift It

About this tool

Polyvagal theory is Stephen Porges's account of how the autonomic nervous system organizes behavior, first set out in the mid-1990s and developed in his later papers and books. Its best known claim is that the parasympathetic branch is not one system but two, running through different parts of the vagus nerve, and that human responses to the environment therefore come in three broad states rather than the familiar two of rest and fight-or-flight. In the clinical world that grew around it, those three states have become a common shorthand for what people feel when they are settled, revved up, or shut down.

In plain words the three states go like this. The ventral vagal state is the one most people would call fine: calm enough to think, available to other people, able to make eye contact and read a face without effort. The sympathetic state is mobilized: heart faster, muscles ready, attention narrowed, urgency everywhere, and the familiar feel of anxiety, irritation or drive. The dorsal vagal state is the far end: shut down rather than revved, flat, heavy, distant, sometimes numb or detached, the state people describe as collapse or as being switched off. Porges put them in that order as a phylogenetic sequence.

The second idea worth knowing is neuroception, Porges's word for the way a body appraises safety and threat below conscious awareness. The point of the term is that nobody decides to drop into a defensive state; the appraisal happens first and the explanation gets added afterwards. It is also why cues matter in the theory: a face, a tone of voice, a sudden noise, a room with no exit. Clinicians find this a useful way to talk with people about reactions that make no sense to them, and it is the part of the model that translates most easily into something a person can work with.

Here is the part most pages on this subject leave out. The neuroanatomical and evolutionary premises of polyvagal theory are seriously contested in the physiology literature. Paul Grossman and Edwin Taylor set out the core objections in 2007, and Grossman restated them at length in 2023, arguing that each of the theory's five basic premises is either untenable or highly implausible on the available evidence: among them the use of respiratory sinus arrhythmia as an index of general vagal tone, which he calls a category mistake, and the claim that this pattern is a specifically mammalian development. These are not fringe objections.

So how should a reader hold that? Two things are true at once. The three-state language is a useful description of experience, and many people recognize themselves in it immediately, which is why therapists keep using it. And the physiological story offered to explain those states is disputed, so claims that an exercise has 'reset your vagus nerve' or moved you 'into ventral' are describing a model, not a measurement. Nothing on this page measures vagal activity. The good news is that the usefulness of the exercises does not depend on the theory being right, because most of them had their own evidence before polyvagal theory existed.

Slow breathing is the clearest example. Sylvain Laborde and colleagues published a systematic review and meta-analysis in 2022 covering 223 studies of voluntary slow breathing, and found increases in vagally mediated heart rate variability during a breathing session, immediately after a single session, and after a multi-session practice. They described slow breathing as a low-cost, low-technology technique with few adverse effects expected. That is a solid finding about slow breathing itself. Lengthening the exhale in particular is the single exercise on this page with the best support behind it, and it needs no theory of three states to be worth doing.

Cold on the face has its own small literature, and it is more specific than the ice baths it gets confused with. Martin Jungmann and colleagues ran a randomized trial applying cold to the neck, cheek and forearm in short intervals and found a pattern of cardiovascular reactivity suggesting increased cardiac-vagal activation, strongest for the lateral neck. Robert Richer and colleagues reported in 2022 that a cold stimulus to the face during a psychosocial stress task was followed by better recovery in heart rate measures and a lower cortisol response. Both are small studies. Cold is not for everyone: skip it with a heart condition, and never use painful cold.

Humming, chanting and singing are taught as vagal exercises on the reasoning that the vagus nerve supplies the larynx and the muscles of the throat, so using the voice engages it. The reasoning is anatomically fair, but direct evidence that humming changes anything measurable in a lasting way is thin. There is also a plainer explanation available: humming and chanting both force a long, slow, steady exhale, which is the mechanism with actual support behind it. That is not a reason to avoid them, since both are free and pleasant, only a reason to be honest about why they may help.

The exercise most often searched for by name comes from Stanley Rosenberg's 2017 book Accessing the Healing Power of the Vagus Nerve, where it is called the Basic Exercise: lying on your back with the fingers interlaced behind the head, keeping the head still while the eyes move to one side, holding until a sigh, swallow or yawn arrives, then repeating to the other side. It is harmless and some people find it settling. It should be said plainly that its evidence consists of its author's clinical observations; no controlled trial supports it, and the theory of vagal function it rests on is the contested one.

Two more exercises are worth their place for different reasons. Orienting means slowly turning the head and letting the eyes find the actual room: the exits, the window, who is here, nothing threatening. It is the oldest trauma-informed intervention on the list and overlaps with the grounding work at Grounding Techniques. Social engagement cues are the other: a warm voice, an unhurried face, a short conversation with someone safe. In Porges's model these are the fastest route back to the settled state, and whatever one makes of the mechanism, the observation that other people calm us is hard to argue with.

A note on language, because it matters for how people read their own reactions. Nervous system dysregulation is not a diagnosis and appears in no diagnostic manual, and nor is being stuck in dorsal vagal shutdown. They are descriptions, and the symptoms they cover belong to many different causes, including thyroid problems, anemia, sleep apnea, medication effects and depression. If flatness, exhaustion or constant alarm has lasted for weeks, the useful move is a medical check and a conversation with a professional, not a better exercise. The self-assessment at Nervous System Dysregulation Test can help you organize what to describe.

The worksheet below is deliberately simple: name the state, name what moved you into it, pick one exercise, rate before and after. The ratings are the useful part, because they tell you which exercises do something for you, and the answer varies widely between people. Someone who gets nothing from cold water may settle reliably with a six-count exhale. Give one exercise the full time rather than sampling four, note the result, and build a short list of two or three that have actually worked. A short list you trust beats a long list you half remember.

Reviewed by Michael Callans, MSW
Checked that the three-state description matches Porges's own account, that the contested status of the theory's physiological premises is stated rather than implied, and that each exercise is credited to the evidence that actually supports it.

References

1. Porges SW. The polyvagal perspective. Biological Psychology. 2007;74(2):116-143. doi:10.1016/j.biopsycho.2006.06.009
2. Grossman P, Taylor EW. Toward understanding respiratory sinus arrhythmia: relations to cardiac vagal tone, evolution and biobehavioral functions. Biological Psychology. 2007;74(2):263-285.
3. Grossman P. Fundamental challenges and likely refutations of the five basic premises of the polyvagal theory. Biological Psychology. 2023;180:108589. doi:10.1016/j.biopsycho.2023.108589
4. Laborde S, Allen MS, Borges U, et al. Effects of voluntary slow breathing on heart rate and heart rate variability: a systematic review and a meta-analysis. Neuroscience and Biobehavioral Reviews. 2022;138:104711. doi:10.1016/j.neubiorev.2022.104711
5. Jungmann M, Vencatachellum S, Van Ryckeghem D, Vogele C. Effects of cold stimulation on cardiac-vagal activation in healthy participants: randomized controlled trial. JMIR Formative Research. 2018;2(2):e10257. doi:10.2196/10257
6. Richer R, et al. Vagus activation by Cold Face Test reduces acute psychosocial stress responses. Scientific Reports. 2022;12.
7. Rosenberg S. Accessing the Healing Power of the Vagus Nerve: Self-Help Exercises for Anxiety, Depression, Trauma, and Autism. North Atlantic Books; 2017.

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