Somatic Experiencing

Levine and the development of the method

Somatic Experiencing (SE) is a trauma-focused, body-oriented psychotherapy associated with Peter A. Levine. Payne, Levine and Crane-Godreau (2015), a paper that lists Levine as a co-author, state that SE was developed by Levine over roughly 45 years and cite his publications from 1977, 1997 and 2010. The paper describes SE as a form of trauma therapy that guides the client's attention to interoceptive, kinesthetic and proprioceptive experience. Because the originator is among the authors, this is an insider account of the method's origins.

A 2021 scoping review by Kuhfuss and colleagues describes SE as built on a generalized psychobiological model of resilience that it attributes to Levine, and says the method was first developed to address trauma-related disorders. The review lists a training manual issued by the Foundation for Human Enrichment among its supplementary sources. The sources opened for this page do not give a dated, independent history of Levine's early work beyond these citations.

The animal-stress model

SE's explanatory account draws on observations of animals under threat. Payne and colleagues describe tonic immobility, a freeze response, and cite experiments by Gellhorn on anesthetized cats in which extreme sympathetic arousal was followed by co-activation of the parasympathetic system. They report that involuntary movements, altered breathing, yawning, shaking and trembling release or discharge intense arousal, that wild animals are described as recovering spontaneously in this way, and that humans may become stuck when this reset fails.

Kuhfuss and colleagues summarize the resulting SE view of post-traumatic stress: symptoms are said to arise from a persistent overreaction of the innate stress system when a defensive reaction that was started, for example a prolonged freeze instead of fight or flight, cannot be completed. This is the model SE practitioners use to explain the method. The sources opened here present it as a theory and not as a tested mechanism.

Spread and early research

Early applications included disaster work. A 2009 study of 142 social service workers affected by Hurricanes Katrina and Rita evaluated a brief one- to two-session stabilization model that its authors say is now called the Trauma Resiliency Model and that uses SE skills. Payne and colleagues wrote in 2015 that they knew of no published peer-reviewed studies of SE, and the first randomized trial that describes itself as such appeared in 2017. The 16 studies in the 2021 scoping review were published between 2007 and 2018, 53% of them in the United States.

Names, titles and the relation to somatic therapy

'Somatic Experiencing' is the name of one specific method, usually abbreviated SE. The organization that trains practitioners, Somatic Experiencing International (SEI), uses the registered-mark form and describes a practitioner title, Somatic Experiencing Practitioner (SEP), that students may not use until all training requirements are met. SEI states that its program is not a licensure program, so the title is a credential from a training body and does not by itself give legal authority to practice.

Kuhfuss and colleagues place SE among body-oriented approaches that work 'bottom-up', beginning with bodily reactions and moving toward cognition, in contrast to top-down cognitive-behavioral methods. Somatic therapy is the wider family of such approaches and has its own Machipedia page. This page covers SE only, and evidence about SE should not be carried to other somatic methods, or the reverse.

Core terms

Payne and colleagues define titration as approaching trauma very slowly, drop by drop, to avoid distress, flooding and possible re-traumatization. Pendulation is movement back and forth between charge or activation and discharge or deactivation, and resourcing is putting a person in touch with inner feelings of safety, strength or comfort. Discharge refers to a spontaneous physical release of autonomic activation, such as trembling or crying, and biological completion to the finishing of a blocked defensive response through imagery and subtle movement. These are the method's own definitions and not measured biomedical constructs.

The Trauma Resiliency Model is a separate brief early-intervention model developed for disaster and emergency settings on SE principles. Studies of it are described in the scoping review as SE-based, but results from the brief model should not be read as results for full-length SE.

Session structure

In the 2017 randomized trial of SE for post-traumatic stress disorder (PTSD), seven therapists licensed by the Israeli Ministry of Health and certified as SE practitioners delivered 15 weekly one-hour sessions. The protocol began with psychoeducation, moved to introducing the traumatic event, then to deeper work and a closing maintenance phase. The authors state that SE does not require extensive or full retelling of the traumatic event.

In a Danish trial for low back pain with comorbid post-traumatic symptoms, SE was delivered by one of two certified SE therapists, a physiotherapist or a psychotherapist, over a mean of 10 sessions across 12 to 16 weeks. The therapists followed the nine-step model outlined by Levine, helping patients attend to body sensations linked to the trauma and to shift between those and sensations they experienced as a place of safety.

Attention, pacing and resources

Kuhfuss and colleagues report that clients' attention is directed to internal visceral and musculoskeletal sensations instead of mainly to thoughts or emotions. Clients identify resources, such as a body part or a memory associated with a positive feeling, and trauma-related memories are approached indirectly and gradually. The trial by Brom and colleagues names titration, pendulation and resourcing as the main techniques and describes them as keeping arousal low while triggers are processed.

Touch and settings

The scoping review found that both practitioners and clients described touch, either self-touch or gentle contact from the therapist, as a supportive element. Practitioners learn the use of touch in an advanced course. Delivery has included individual sessions, brief one- to three-session disaster interventions, and an eight-week web-based group program with breast cancer survivors in Italy.

Trauma and stress symptoms

SEI describes SE as addressing symptoms of stress, shock and trauma held in the body, and as helping people who are stuck in fight, flight or freeze patterns to recover and become more resilient. Payne and colleagues state that SE claims to resolve symptoms of chronic and traumatic stress through completing thwarted defensive responses and regulating excess autonomic arousal.

Uses beyond PTSD

Kuhfuss and colleagues note that SE is increasingly used in practice for panic disorder, depression and chronic pain, based on the view that these conditions share dysregulation of the stress system. Authors of a 2018 study of SE training describe SE as designed to address autonomic nervous system dysregulation and symptoms such as anxiety, depression, PTSD, migraines, fibromyalgia and chronic fatigue. These are statements of intended use. The studies that tested such uses are reported in the next section, and most were small or lacked a randomized comparison.

Randomized trial in PTSD

Brom and colleagues (2017) randomized 63 adults who met DSM-IV-TR criteria for PTSD, 33 to SE and 30 to a waitlist, in Israel. Assessors were blinded. Mixed models showed larger reductions in PTSD severity (Cohen's d 0.94 to 1.26) and depression (d 0.7 to 1.08) in the SE group than in the waitlist group. Five participants in each group dropped out, analysis was not by intention to treat, there was no active comparator, and the authors note a small community sample.

Randomized trials in low back pain

Andersen and colleagues (2017) randomized 91 patients with chronic low back pain and PTSD symptoms in Denmark, 45 to usual care plus 6 to 12 SE sessions and 46 to usual care alone. Adding SE reduced PTSD symptoms and fear of movement relative to usual care, but disability and pain fell similarly in both groups. The authors questioned the clinical importance of the effect. Clinicians were not blinded.

A larger Danish trial (Andersen and colleagues, 2020) randomized 114 patients with low back pain and comorbid post-traumatic stress symptoms, 55 to up to 12 SE sessions plus physiotherapy and 59 to physiotherapy alone. No significant group differences were found on any outcome at 6 or 12 months. Both groups improved on pain-related disability by 20 to 27% and showed a small reduction in post-traumatic symptoms. No diagnostic interview confirmed PTSD, so some participants may not have met criteria.

Reviews

Kuhfuss and colleagues (2021) conducted a scoping review, not a systematic review of effect sizes, of studies to August 2020. Of 83 articles identified, 16 were included (ten quantitative, six qualitative), with samples of 3 to 350. Only two quantitative studies were randomized and three more used a non-randomized control group. The review reports positive effects on PTSD symptoms but judges risk of bias to be mixed and calls for unbiased randomized research.

Bisson and colleagues (2020) reviewed 30 randomized trials of non-drug, non-psychological PTSD treatments. SE was one of six approaches with emerging evidence, based on one trial with 60 participants compared with a waitlist (standardized mean difference -0.75, 95% CI -1.28 to -0.22), rated very uncertain under the GRADE approach. The authors judged it premature to offer such interventions routinely.

Other designs and gaps

A propensity-matched, non-randomized study of 91 treated and 51 comparison social service workers after the 2005 hurricanes found larger gains in resiliency indicators and fewer PTSD symptoms with brief SE-based treatment. A non-randomized study of 21 intervention and 14 control breast cancer survivors reported lower anxiety and depression with an 8-week group program. A within-group study of 18 students in a 3-year SE training did not test SE as a treatment, so it says little about clinical effect.

Qualitative interviews with 30 participants from a trial comparing SE with prolonged exposure in military veterans described bodily experience as prominent in both therapies. The outcome results of that trial were not among the sources reviewed.

Theory and mechanism

Payne and colleagues present their account of SE through a composite case and state that it is not evidence for their hypotheses. Their neurophysiological explanation, a proposed core response network, was offered as theory, and they wrote that no studies of SE's mechanisms had been published. Kuhfuss and colleagues add that practitioners interviewed in three studies proposed that clients who do not accept SE's concept of trauma stored in the nervous system tended to be non-compliant with SE and to prefer standard PTSD treatment.

Payne and colleagues also draw on Porges's polyvagal theory. That theory is disputed: a 2026 evaluation by Grossman and 38 co-authors concluded it is untenable on neurophysiological and evolutionary grounds, and Porges replied in the same journal that the critique evaluates a reconstructed version of the theory. Neither paper addresses SE directly, and the sources reviewed do not settle how far this dispute affects SE's techniques.

Limits of the evidence

The scoping review notes 24 different outcome instruments across ten quantitative studies, mixed risk of bias, and no standardized treatment manual, which it says limits comparison between studies. Trials so far have compared SE with waitlists, usual care or physiotherapy and not with established trauma-focused psychotherapies. The authors of the largest trial found no added benefit from SE over physiotherapy alone in a population with low back pain.

What studies report about harms

Brom and colleagues state that, to the best of their knowledge, no adverse reactions were reported by therapists or participants. The 2020 Danish trial reported no adverse or serious adverse events, and the 2017 Danish trial did not report them. Bisson and colleagues note that tolerance was measured only to a limited extent in the trials they reviewed and that adverse events were not formally assessed. A lack of reported harms in small trials is not the same as evidence that none occur.

Pacing, re-traumatization and touch

Payne and colleagues describe titration as intended to avoid unnecessary distress, flooding and re-traumatization. They warn that a full reactivation of a trauma memory can be harmful and can compound the original trauma, which is the reason SE approaches trauma gradually. Whether SE's pacing lowers such risks compared with other trauma therapies has not been tested in the sources reviewed. Because touch is used by some practitioners, a person can ask about consent and what contact to expect, and SEI's ethics materials list touch and consent forms among topics of its training ethics.

Training and care boundaries

SEI states that its practitioner certificate requires 216 contact hours across six to eight modules depending on the country, 12 hours of personal sessions and 18 credit hours of case consultations. It also says SE is not a licensure program and that its first US code of ethics, standards of practice and grievance procedure was established in 2021 for US-based trainings. No statutory regulation or independent training standard for SE was sought or found for this page. SE is not a replacement for emergency or specialist mental health care, and people with severe symptoms, suicidal thoughts or other urgent concerns need prompt care from a qualified clinician.