Somatic Experiencing: Peter Levine's Body-Based Trauma Therapy
Somatic experiencing is a body-based approach to trauma developed by Peter Levine, built on the idea that a threat response left unfinished stays active in the nervous system. This guide covers the core ideas of felt sense, resourcing, titration and pendulation, what a session actually looks like, and what the small research base does and does not show.
Reviewed byMichael Callans, MSWKey terms in somatic experiencing
Build your resource list
- Sit somewhere ordinary with this sheet and a pen. Do it on a calm day: a resource list written under pressure is usually a blank page.
- Places: write three physical places where your shoulders drop. A room, a bench, a stretch of road, a shower, a car with the engine off.
- People and animals: write three beings whose presence settles you, including ones you can only remember or imagine.
- Body: find one spot that feels neutral or pleasant right now, the soles of the feet, the weight of the hands, the back against the chair, and write where it is and what it feels like.
- Movement: note one small movement that helps. Pressing the feet into the floor, a long exhale, rolling the shoulders, holding something warm.
- Underline one item in each group. Those four are your starting kit: take them to a session, or use them on your own with the practice below.
Four kinds of resource
Place
Somewhere your body has already decided is fine. It does not have to be beautiful or far away: a stairwell, a kitchen at six in the morning, the passenger seat. Write enough detail that you can call up the light and the sound.
People and animals
Presence that asks nothing of you. A friend, a grandparent, a dog, a colleague who is simply easy to be near. Remembered and imagined company counts, which matters when the real version is far away or gone.
Body
A spot that is not carrying the problem. Feet on the floor, hands in the lap, the breath at the belly, the warmth behind the knees. Most people can find one even on a bad day, and that one spot is the anchor.
Imagination and memory
A scene, a piece of music, a stretch of a good day you can replay. Levine's model treats an imagined resource as a real one, because the nervous system responds to it, not only to what is in the room.
A short pendulation practice (about five minutes)
- Start with the resource, not the problem. Bring the body spot you underlined to mind and stay there for about thirty seconds.
- Now notice, without going further into it, one place in your body that carries some of the difficulty. Name where it is and what it is like: tight, hot, empty, buzzing, heavy.
- Stay with it for ten to fifteen seconds only. The small dose is the method, not a lack of nerve.
- Return to the resource and stay there twice as long as you spent on the difficulty. Let anything that wants to move, move: a sigh, a shift in the chair, a stretch.
- Repeat two or three times, and always finish on the resource. Then look slowly around and name four objects out loud before you stand up.
- If the difficult sensation grows instead of easing, or the room starts to look unreal, stop, stand, and orient to the room. Spreading distress is a signal to do this work with a practitioner rather than alone.
What a session is actually like
Expect long pauses and small questions: what do you notice now, where is that in your body, what happens if we stay here a moment. A practitioner tracks your breathing, color, posture and voice as much as your words, and will often slow things down just as you are building momentum, because speed is what the model is trying to avoid. Sessions commonly run 50 to 60 minutes and the story of the event may barely come up. Touch, if the practitioner uses it, is usually light contact at the feet, back or shoulders, named in advance and refusable at any point without explanation. Some people leave a session feeling tired and loose; some feel nothing much for a day. Needing a slower pace is information, not a failure.
What the evidence shows, and does not
One randomized trial supports it: Brom and colleagues, 2017, 63 adults with post-traumatic stress, 15 sessions against a waiting list, significantly lower symptom scores in the treated group. A waiting list is a weak comparison, so that result says the treatment beats nothing, not that it beats an established therapy. The 2021 scoping review by Kuhfuss and colleagues gathered 16 studies, found preliminary positive effects across post-traumatic, affective and somatic outcomes, rated the overall quality mixed on a risk-of-bias assessment, and asked for independent randomized trials. What follows from that: it is reasonable to try, reasonable for a therapist to use, and not yet in the same evidence tier as prolonged exposure, cognitive processing therapy or EMDR. Anyone claiming it is proven superior to those is ahead of the data.
Go slower, or get support first, if
- You dissociate easily, lose time, or feel unreal when you turn attention inward. Orienting outward to the room comes before sensing inward.
- You are currently unsafe at home, at work or elsewhere. Settling the nervous system is not the first job; changing the situation is.
- Attention to the body brings a strong urge to harm yourself. Stop the exercise and bring this to a licensed professional.
- You are in early recovery from an eating disorder or chronic pain treatment, where body attention is handled in a specific way by your treatment team.
- Sensation reliably escalates rather than settles across several attempts. That is a sign for guided work, not for trying harder alone.
Related tools & tests
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About this tool
Somatic experiencing is an approach to the effects of trauma that works through bodily sensation rather than mainly through talk. It was developed from the 1970s onward by Peter Levine, who holds doctorates in medical biophysics and in psychology, and it reached general readers through Waking the Tiger in 1997 and in more detail through In an Unspoken Voice in 2010. Its central claim is that a threat response which could not be carried through at the time, the fight or the flight that got interrupted, stays active in the nervous system, and that letting it finish slowly and in small doses is what settles it.
The idea came partly from watching animals. A gazelle that escapes a predator trembles, shakes and then returns to grazing; it does not, in Levine's reading, carry the event forward as a lasting symptom. Levine proposed that people, whose cortex can override an impulse to shake or run, often leave the response unfinished and then live with the leftovers: hypervigilance, numbness, a startle that fires at nothing, a body braced for something that already happened. It is worth saying plainly that the animal story is an analogy Levine used to explain his model, not an experiment that establishes it.
Four words carry most of the method. Felt sense, a term Levine borrowed from the philosopher Eugene Gendlin, means the vague bodily sense of a situation before words are available for it. Resourcing means deliberately building up what already feels steady, a place, a person, a memory, a part of the body that is comfortable, so there is somewhere to return to. Titration means contact with the difficult material in doses small enough that the nervous system does not flood. Pendulation means moving back and forth on purpose between the uncomfortable sensation and the resource, instead of staying in either one.
Read the diagram as text
Two panels share one quiet baseline. In the left panel an ink curve climbs steeply; its way back down is drawn as a dashed line and a brand bar cuts straight across it, after which the course continues as a flat ink line well above the baseline, running off the panel. In the right panel the same climb happens, and then a brand path swings back and forth between a quiet upper rail and a quiet lower rail, each swing smaller than the last, until it arrives on the baseline at an accent dot. The brand marks the interruption in one panel and the back and forth that finishes the response in the other. On the phone canvas the two panels stack.
A threat response that could not finish
Conceptual route, not counts
The threatening event: Something the body moves to fight or to run from
The response starts: The body mobilizes to act
It cannot be carried through: The act is impossible, or the impulse to shake or run is overridden
The activation stays on: Hypervigilance, numbness, a startle that fires at nothing, a body braced for something that already happened
Contact in small doses: Titration, and pendulation back and forth between the difficult sensation and a resource
The response finishes: The settling this model calls discharge: a shaky exhale, trembling, warmth in the hands, muscle tension dropping
The threatening event → sets off → The response starts
The response starts → is interrupted before it finishes → It cannot be carried through (error transition)
It cannot be carried through → leaves the activation running → The activation stays on
The activation stays on → is approached in small doses → Contact in small doses
Contact in small doses → lets the response complete → The response finishes
A session usually looks unremarkable from outside. A practitioner asks what you notice in your body right now, waits, and asks again. You may be invited to track a sensation as it changes, to let a small movement happen, to look slowly around the room, or to stop and come back to a resource. Discharge in this model means the settling that can follow: a shaky exhale, a yawn, warmth in the hands, trembling, tears, a drop in muscle tension. The pace is deliberately slow, and recounting the story of what happened is usually less central than it is in most trauma therapies.
The honest summary of the evidence is a small research base with promising results and real limits. The main randomized trial, by Danny Brom and colleagues in 2017, assigned 63 adults with post-traumatic stress to 15 sessions of somatic experiencing or to a waiting list, and reported significantly lower symptom scores in the treated group. A 2021 scoping review by Maren Kuhfuss and colleagues found 16 studies that met its inclusion criteria, reported preliminary positive effects on post-traumatic, affective and somatic symptoms, judged overall study quality mixed, and called for more independent randomized trials.
Somatic experiencing is often taught alongside Stephen Porges's polyvagal theory, which proposes that the vagus nerve supports a graded set of states: social engagement, mobilization, and shutdown. The two fit together neatly and many practitioners present them as a pair. Readers should know that polyvagal theory is itself contested in comparative neuroanatomy, with published critiques arguing that parts of its evolutionary account do not hold up. The practical skills on this page do not depend on that argument being settled, and Polyvagal Exercises collects the exercises people associate with the theory.
It helps to see where this method sits among trauma treatments. Prolonged exposure, cognitive processing therapy and EMDR carry far larger evidence bases and appear in clinical guidelines; somatic experiencing does not yet. Body-based elements also live inside better-tested treatments: interoceptive exposure in panic work, the body scan in mindfulness-based programs, the arousal skills in dialectical behavior therapy. If you want a single first-line treatment for diagnosed post-traumatic stress, the guideline treatments are the stronger bet, and this method is better understood as an addition, or as an option when those have not suited you.
Somatic experiencing tends to appeal to people for whom talking about the event has not helped, or has made things worse, and to people whose loudest complaint is physical: a chest that will not unclench, sleep that never deepens, a jaw that aches by noon. Go carefully if you dissociate easily, if your history makes attention to the body frightening, or if you are in an unsafe situation right now, because the first task there is safety rather than sensation. Touch is used by some practitioners and not others; it should always be explained in advance, optional, and withdrawable mid-session without a discussion.
Practitioners who complete the training run by Somatic Experiencing International use the letters SEP after their name. The organization's published graduation requirements list 216 contact hours of training taken over roughly three years, 12 hours of personal sessions, and 18 credit hours of case consultation. Note what the credential is not: it certifies training in this method, not a license to practice psychotherapy. Ask separately about clinical licensure, about what happens if something difficult surfaces between sessions, and about whether touch is part of how that person works. The exercises themselves sit on Somatic Exercises.
References
- Levine PA. Waking the Tiger: Healing Trauma. Berkeley, CA: North Atlantic Books; 1997.
- Levine PA. In an Unspoken Voice: How the Body Releases Trauma and Restores Goodness. Berkeley, CA: North Atlantic Books; 2010.
- Brom D, Stokar Y, Lawi C, et al. Somatic experiencing for posttraumatic stress disorder: a randomized controlled outcome study. J Trauma Stress. 2017;30(3):304-312. doi:10.1002/jts.22189
- Kuhfuss M, Maldei T, Hetmanek A, Baumann N. Somatic experiencing: effectiveness and key factors of a body-oriented trauma therapy: a scoping literature review. Eur J Psychotraumatol. 2021;12(1):1929023. doi:10.1080/20008198.2021.1929023
- Porges SW. The Polyvagal Theory: Neurophysiological Foundations of Emotions, Attachment, Communication, and Self-Regulation. New York: W. W. Norton; 2011.
- Somatic Experiencing International. SE Practitioner graduation requirements. Accessed November 2026. https://traumahealing.org/graduation-requirements/
Cite this source
Psychology.com. (2026, November 6). Somatic Experiencing. Psychology.com. https://psychology.com/tools/somatic-experiencing
Somatic Experiencing FAQ
What is somatic experiencing?
Somatic experiencing is a body-based approach to trauma developed by Peter Levine. Instead of working mainly with the story of what happened, a practitioner helps you track physical sensation in small doses, moving back and forth between something uncomfortable and something that already feels steady. The underlying idea is that a defensive response which got interrupted at the time stays switched on in the nervous system, and that allowing it to finish, slowly, is what lets the body stand down. Sessions are quiet and slow, and often involve long pauses while you notice what is happening inside.
Does somatic experiencing actually work?
There is early evidence, not strong evidence. One randomized trial in 2017 gave 63 adults with post-traumatic stress 15 sessions of somatic experiencing or put them on a waiting list, and symptom scores were significantly lower in the treated group. A 2021 scoping review of 16 studies reported preliminary positive effects on post-traumatic, affective and somatic symptoms, rated the overall quality of the research mixed, and called for independent trials. So it is a reasonable thing to try. It is not yet in the same evidence tier as prolonged exposure, cognitive processing therapy or EMDR, which appear in treatment guidelines.
What happens in a somatic experiencing session?
Less than most people expect, and that is deliberate. A practitioner asks what you notice in your body right now, waits, and asks again. You might track a sensation as it shifts, let a small movement complete, look slowly around the room, or stop and return to a resource such as the feel of your feet on the floor. The event itself may hardly be described. Some practitioners use light touch at the feet, back or shoulders; it should be explained first and you can decline it or stop it at any point. Sessions typically run 50 to 60 minutes.
Is somatic therapy the same thing as somatic experiencing?
Not quite. Somatic experiencing is one named method with its own training and its own vocabulary. Somatic therapy is the broader family of body-based approaches, which also includes sensorimotor psychotherapy, Hakomi, bioenergetics and body-oriented work inside other therapies. People search for somatic therapy and often land on somatic experiencing because it is the best known of the group, but a therapist advertising somatic work may be trained in any of them, or in none of them formally. It is fair to ask directly which method someone trained in and with whom.
Can somatic experiencing make things worse?
It can, in the sense that any trauma work can stir things up, which is exactly why titration and resourcing exist. The risk is highest if you dissociate easily, if attention to the body is frightening because of what happened, or if you are still in an unsafe situation, where the priority is changing the situation rather than settling the nervous system. Warning signs during an exercise are sensation that escalates rather than eases, the room starting to look unreal, or a strong urge to harm yourself. Stop, stand up, look around the room, and take it to a licensed professional.
How does somatic experiencing differ from EMDR or CBT?
The main difference is where attention goes. Cognitive behavioral treatments work on the meaning of the event and on the avoidance that keeps it alive, usually with repeated structured recounting or written accounts. EMDR pairs recall of the memory with bilateral eye movements or taps. Somatic experiencing tries to avoid full recall altogether, working with the physical residue in small doses so the body does not flood. In practice the approaches are mixed often: a therapist may use somatic skills to widen your tolerance first, then do the guideline treatment that has the larger evidence base behind it.
How do I find a somatic experiencing practitioner?
Look for the letters SEP, which mean the person completed the training run by Somatic Experiencing International: 216 contact hours over roughly three years, 12 hours of personal sessions and 18 credit hours of case consultation. That credential covers training in the method only, so ask separately whether the person also holds a clinical license, what their background is in trauma, and what happens if something hard surfaces between appointments. If you want someone who can combine body-based work with a guideline treatment, say that at the first contact.