Global High (Intensity) Activation in Somatic Experiencing: When the Nervous System Gets Stuck in “Up”
One of the most fascinating concepts I have encountered during Somatic Experiencing (SE) training is the idea of global high Intensity activation (GHIA).
At first glance, it can look like anxiety, overthinking, “being busy,” hypervigilance, ADHD, emotional overwhelm, burnout or even excitement. But underneath it sits something more biological - a nervous system that has become chronically organised around mobilisation and survival.
Many people living in global high activation (GHIA) do not even realise they are activated. It simply feels like normal life.
What is GHIA?
In Somatic Experiencing, GHIA refers to a state where the nervous system remains persistently “upregulated.”
The body behaves as though danger may be imminent, even when no immediate threat is present.
This does not necessarily mean someone is panicking.
In fact, many highly functioning people live in this state for years:
constantly productive
hyper-responsible
unable to switch off
always “on”
emotionally intense
highly vigilant to others
unable to fully rest
driven, perfectionistic or compulsively helpful
Their system has adapted to survival through activation.
Peter Levine, founder of Somatic Experiencing, describes trauma not simply as the event itself, but as the unresolved survival energy that becomes trapped in the nervous system (Levine, 1997).
Global high activation is often what happens when that survival mobilisation never truly completes.
What Does It Feel Like?
People often describe:
feeling “wired but tired”
difficulty relaxing even during holidays
scanning for problems
irritability or emotional reactivity
shallow breathing or breath holding
muscle tension, jaw clenching or TMJ
insomnia or waking alert at 3am
digestive problems
chronic pain or fatigue
feeling unsafe in stillness
discomfort with silence or slowness
needing constant stimulation
over-exercising or over-working
talking quickly or thinking rapidly
difficulty sensing internal bodily states unless they become extreme
Sometimes there is a paradoxical sense of feeling alive through activation.
Without the familiar intensity, people can suddenly feel flat, empty, lost or unsafe.
This is important clinically because many people unconsciously fear regulation.
Stillness can feel more threatening than busyness.
What Causes It?
GHIA usually develops through repeated experiences where the nervous system learned:
“I must stay alert”
“I cannot fully relax”
“Something bad could happen”
“I must perform to stay safe”
“Rest is dangerous”
“Needs are not allowed”
“Emotion is overwhelming”
“Connection is unpredictable”
This may arise from:
childhood emotional unpredictability
developmental trauma
bullying
chronic stress
medical trauma
caregiving roles
attachment disruptions
environments requiring hyper-functioning
chronic illness
unresolved fight/flight responses
long-term masking in ADHD/autism
repeated overwhelm without enough support
Importantly, the nervous system is not “choosing” this.
It is adapting.
What was once protective can later become exhausting.
The Body in High Activation
When someone lives in chronic sympathetic mobilisation, we often see:
increased muscle tension
elevated stress hormones
reduced digestive functioning
shallow upper chest breathing
narrowed attention
reduced interoception
difficulty accessing ventral vagal safety states
oscillation between hyperarousal and collapse
Over time, this can contribute to:
burnout
chronic fatigue
persistent pain
functional neurological symptoms
panic
dissociation
immune dysregulation
hormonal disruption
emotional exhaustion
The body is essentially spending prolonged periods preparing for action that never fully resolves.
Why “Calming Down” Often Doesn’t Work
One of the biggest mistakes we make is trying to force regulation too quickly.
Telling a highly activated nervous system to:
“just relax”
meditate for long periods
sit still
breathe deeply
stop thinking
can actually increase threat.
Why?
Because the body has learned that activation equals safety.
Slowing down too rapidly may feel profoundly unsafe.
This is why Somatic Experiencing focuses on titration and pendulation rather than overwhelm or emotional flooding.
The goal is not to “shut activation off.”
The goal is to help the nervous system discover that it no longer has to remain permanently mobilised.
Gentle Ways to Begin Slowing Things Down
1. Start with Orienting
Rather than immediately going inward, begin by gently looking around the environment.
Notice:
colours
shapes
light
movement
objects that feel pleasant or neutral
Orienting helps the nervous system recognise:
“Right now, in this moment, I may actually be safe.”
This can be surprisingly regulating.
2. Slow Down by 5%, Not 100%
For highly activated systems, tiny shifts matter.
You do not need to suddenly become calm.
Instead:
walk slightly slower
pause before replying
lengthen the exhale a little
soften the jaw for a moment
take micro-pauses during the day
Small moments of interruption begin teaching the body a new rhythm.
3. Build Capacity for Stillness Gradually
Many people discover they cannot tolerate stillness for long.
That is not failure.
Try:
30 seconds of quiet
noticing your feet
placing a hand on your chest
listening to one sound fully
feeling support from a chair
Regulation is often built in seconds, not hours.
4. Track Activation Without Judging It
Instead of:
“Why am I like this?”
try:
“Ah, my nervous system is activated right now.”
This shift from criticism to observation changes the internal relationship dramatically.
5. Complete Tiny Defensive Responses
Sometimes the body needs small amounts of completion.
This might include:
pushing gently against a wall
allowing the legs to move
shaking
stretching
turning away
imagining boundaries
uncurling from bracing patterns
The body often carries incomplete defensive responses long after threat has ended.
6. Prioritise Co-Regulation
Highly activated nervous systems often regulate best in connection.
Safe relationships matter.
This may include:
therapy
calm friendships
animals
nature
breathwork done safely
gentle movement practices
yoga
compassionate presence
Regulation is rarely achieved through force or isolation.
Regulation Is Not the Same as Shutdown
People sometimes fear that if they stop “doing,” they will lose themselves.
But true regulation is not collapse, numbness or loss of energy.
Healthy nervous systems still mobilise.
They still feel passion, excitement, creativity and intensity.
The difference is flexibility.
The system can move up when needed and return down again afterwards.
That is resilience.
Final Thoughts
Global high activation is not weakness.
It is often the nervous system’s brilliant attempt to keep someone functioning, connected, protected or emotionally intact.
But living permanently in mobilisation comes at a cost.
Somatic work is not about becoming passive or endlessly calm.
It is about helping the body rediscover safety, flexibility, rest and choice.
And often, that begins not with dramatic catharsis, but with one tiny moment where the nervous system realises:
“Maybe I do not have to stay on high alert all the time.”
References
Levine, P. A. (1997). Waking the Tiger: Healing Trauma. North Atlantic Books.
Levine, P. A. (2010). In an Unspoken Voice: How the Body Releases Trauma and Restores Goodness. North Atlantic Books.
Payne, P., Levine, P. A., & Crane-Godreau, M. A. (2015). Somatic experiencing: Using interoception and proprioception as core elements of trauma therapy. Frontiers in Psychology, 6, 93.
Porges, S. W. (2011). The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication and Self-Regulation. Norton.
Dana, D. (2018). The Polyvagal Theory in Therapy. Norton.