Why Your Body Won't “Switch Off”, and How Group Therapy Helps It Learn Safety Again

For first responders and veterans, recovery is shaped by more than what you saw or experienced on the job. It's shaped by the culture you served in, the trust you built with the people beside you, and the reactions your body has learned to respond to danger.

This is one of the reasons group-based recovery, alongside people who understand that world without needing it explained, can work in ways individual therapy alone sometimes can't reach.

To understand why, it helps to look beyond thoughts and memories, to what's actually happening in the nervous system.

Understanding Trauma Beyond Thoughts and Memories

For many years, trauma and PTSD were understood mainly through a psychological lens, focused on thoughts, memories and behaviours. These remain central. But modern science has highlighted a deeper layer: the role of the nervous system in shaping how trauma is experienced and how recovery happens.

Polyvagal Theory, developed by Stephen Porges, offers a way of understanding how your nervous system is constantly scanning for cues of safety or threat, usually without you being consciously aware of it. This process is sometimes called neuroception.

After trauma, particularly the kind of repeated, cumulative exposure common in frontline and military service, the nervous system can become biased toward detecting danger, even in situations that are actually safe. This can show up as hyperarousal, irritability, shutdown, emotional numbing, withdrawal or dissociation.

These aren't signs of psychological weakness. They're adaptive survival responses that have become difficult to switch off.

The Three States Your Body Moves Between

Polyvagal Theory describes three broad states that many people recognise once they hear them described:

• Calm and connected: regulated, socially engaged, able to reflect and relate to others (Ventral Vagal)

• Fight or flight: anxiety, irritability, hypervigilance, agitation or a sense of urgency (Sympathetic activation)

• Shutdown: freeze, collapse, numbness, fatigue, withdrawal or feeling emotionally disconnected (Dorsal vagal shutdown)

Understanding which state you're in and that moving between them isn't a choice you're consciously making is often the first step toward feeling less at the mercy of these reactions.

Why Connection Helps the Body Feel Safe Again

One of the most useful ideas in this theory is that people regulate through connection. Safe interactions, tone of voice, facial expression, body posture, a steady and responsive presence, help the nervous system shift toward greater safety.

Trauma often teaches the body that people are dangerous, unpredictable or unavailable. Recovery involves more than understanding what happened. It also requires repeated experiences of safe, steady connection, which is exactly what a well-run therapy group can offer over time.

Why group therapy can provide benefits that individual therapy might not always achieve.

Group therapy is often described as efficient, but for trauma recovery it offers something more significant. It provides repeated, structured opportunities to feel understood, to stay present while emotionally engaged with others, and to practise connection in a setting that feels safe rather than threatening.

For first responders and veterans specifically, this can matter even more. Group members bring shared occupational identity, credibility and understanding that a clinician, however skilled, cannot fully replicate. In programs that bring people together around shared experience, peers can offer validation and understanding in ways that make it easier to stay in treatment and tolerate the vulnerability recovery requires.

This doesn't make group therapy the right starting point for everyone, or mean it needs to replace individual therapy. Co-regulation and safe connection can also happen one-to-one, and for some people that's exactly where recovery needs to begin. For others, the two work well together, individual therapy for more personal or private material, group therapy for the specific benefit of shared, credible connection.

Which pathway fits, or whether it's a combination of both, is something worked out through assessment, not assumed in advance.

Polyvagal Theory: What the Research Says

Polyvagal Theory is best understood as a clinically useful framework for explaining trauma responses, rather than a fully settled scientific model. Some details remain debated among researchers.

What is well supported is the broader evidence that practices such as paced breathing, mindfulness and body-based regulation are associated with improvements in emotional regulation and trauma symptoms.

This is why Polyvagal-informed practice is used alongside established trauma therapies, not instead of them. It offers a useful language for understanding why safety and connection matter so much in recovery, often in conjunction with individual treatments such as trauma-focused CBT, Prolonged Exposure and EMDR.

Key Takeaways

• Trauma affects the nervous system, not just thoughts and memories

• Feeling unable to switch off is a physiological state, not a personal failing

• Safe connection helps the nervous system learn to feel safe again

• Group therapy can offer this kind of connection in a way individual therapy alone sometimes can't

• This approach works alongside, not instead of, established individual trauma-focused treatment

Where to Start

At Geelong Psychology, treatment is guided by collaborative clinical assessment, current evidence and your individual presentation, not a predetermined therapy.

For some, that means individual therapy. For others, it means a group-based program built around shared experience and trust.

For many, it's a combination of both at different stages of recovery. Our role is to help you find the pathway that's right for you.

Contact Geelong Pyschology

References

Flores, P. J., & Porges, S. W. (2017). Group psychotherapy as a neural exercise: Bridging Polyvagal Theory and attachment theory. International Journal of Group Psychotherapy, 67(2), 202-222.

Mathersul, D. C., Zeitzer, J. M., Schulz-Heik, R. J., Avery, T. J., & Bayley, P. J. (2024). Emotion regulation and heart rate variability may identify the optimal posttraumatic stress disorder treatment: Analyses from a randomized controlled trial. Frontiers in Psychiatry, 15, 1331569.

Poli, A., Gemignani, A., Soldani, F., & Miccoli, M. (2021). A systematic review of a polyvagal perspective on embodied contemplative practices as promoters of cardiorespiratory coupling and traumatic stress recovery for PTSD and OCD. International Journal of Environmental Research and Public Health, 18(22), 11778.

Porges, S. W. (2011). The polyvagal theory: Neurophysiological foundations of emotions, attachment, communication, and self-regulation. W. W. Norton.

Sripada, R. K., Bohnert, K. M., Ganoczy, D., Blow, F. C., Valenstein, M., & Pfeiffer, P. N. (2016). Initial group versus individual therapy for posttraumatic stress disorder and subsequent follow-up treatment adequacy. Psychological Services, 13(4), 349-355.