Where it comes from

Levine began developing the approach in the 1970s, starting from his doctoral work on stress, and set it out in his 1997 book Waking the Tiger. Its premise is that trauma symptoms come from defensive responses, such as freezing, that were interrupted and never completed. Sessions direct attention to sensations inside the body and to posture and movement, and the method deliberately avoids intense re-exposure to traumatic memories. Its explanations draw partly on polyvagal theory, whose core premises a 2023 review argues are untenable or highly implausible.

What the research shows

A 2021 scoping review included 16 studies, found preliminary evidence of benefit for post-traumatic symptoms but mixed study quality, and called for unbiased randomized trials. The randomized trials point in different directions. In 63 people with PTSD, 15 weekly sessions reduced symptom severity substantially compared with a waiting list (Cohen’s d of 0.94 to 1.26). Against active treatment the picture is weaker: in 91 patients with back pain and PTSD, adding brief Somatic Experiencing to usual care reduced PTSD symptoms more, though by less than the authors expected, and in a trial of 114 patients, adding it to physiotherapy made no difference on any outcome.

How it differs from related approaches

“Somatic therapy” is a broad label for body-based work; Somatic Experiencing is one specific method within it. It differs from cognitive-behavioral and exposure-based trauma therapies, which have far more trials behind them, and from HRV biofeedback, which trains breathing and has meta-analytic evidence for stress and anxiety. If a provider offers body-based work, it is reasonable to ask which method is used and what training the practitioner has.

Related terms

Heart Rate Variability: includes biofeedback, a body-based method with more trial evidence.

Psychedelic Integration: the follow-up work after a session, which some models describe as including the body.