TRE (Tension and Trauma Release Exercises): What It Is and How to Try It

The body holds tension the mind cannot always name. You feel it as tight hips, a locked jaw, shoulders that will not drop no matter how many long exhales you take. You know something is stored there. You just do not have a lever to release it.

Tension and Trauma Release Exercises, usually shortened to TRE, offer one such lever. Developed by trauma therapist and bioenergetic bodyworker David Berceli in the late 1990s, TRE is a short sequence of physical positions designed to fatigue specific muscle groups until the body begins to tremor on its own. That involuntary tremor, Berceli argues, is the same discharge mechanism seen in mammals after a threat has passed. Deer shake. Impala shake. Humans, mostly, do not.

Whether TRE actually “releases trauma” in the way its name promises is a question the evidence has not fully answered. What we can say is that the technique is simple, cheap, and safe for most healthy adults, and that a small but growing body of research suggests real benefits for stress, low back pain, and autonomic regulation. This is a look at what TRE is, what it does, what the studies actually show, and how to try it without hurting yourself.

What TRE actually is

TRE is a set of seven exercises. Most are unremarkable on their own: a wall sit, a standing forward fold, a supported hip stretch. The point is not the exercise. The point is what happens when you finish the exercise and lie down.

The final position is the diagnostic one. You lie on your back with the soles of your feet together and your knees dropped open in a butterfly shape, then slowly draw the knees toward each other about a fist’s width. Held long enough after a series of muscle-fatiguing positions, the body begins to tremor. The shaking usually starts in the inner thighs or pelvic floor and can migrate up through the trunk. You are asked to allow it, not direct it, and to stop after five to fifteen minutes.

Berceli calls this involuntary movement a “neurogenic tremor,” meaning a tremor generated by the nervous system rather than voluntarily produced by the muscles. His theoretical claim is that this tremor discharges tension held in the psoas and deep core, the same tension that (in his model) accumulates during chronic stress and unresolved threat responses.

That mechanism story is a hypothesis. The tremors themselves are real and observable. Whether they specifically discharge trauma-linked tension, or whether they simply produce a general parasympathetic shift, is not settled.

The theory: mammals shake, humans forget how

The clinical case for TRE draws on the same intellectual lineage as Peter Levine’s Somatic Experiencing and Bessel van der Kolk’s work on embodied trauma. The core idea: when a mammal escapes a predator, the residual sympathetic activation dissipates through spontaneous shaking. If that discharge does not happen, the activation stays in the body as chronic muscular bracing.

Humans, the theory goes, have cortex enough to override the shaking response. We freeze the tremor because it is socially embarrassing or because we were taught not to fall apart. Over years, that undischarged activation shows up as tight hips, a rigid diaphragm, chronic back pain, and a nervous system that never quite settles.

TRE, in this framing, is not adding anything new. It is removing the inhibition on a response the body already knows how to make.

If you have read work by Stephen Porges on the polyvagal system or by van der Kolk on the somatic imprint of trauma, this framing will sound familiar. It is worth noting, however, that the “shaking as trauma discharge” mechanism is more clinical intuition than laboratory finding. Studies of wild animals do show post-threat tremoring, but the leap from that observation to “humans need to shake out their trauma” is still a leap. It might be right. It is not yet proven.

What the research actually shows

The published TRE literature is small. As of the mid-2020s, most studies are pilots or case series with fewer than 60 participants, often unblinded, sometimes without controls. The results are directionally positive but not yet definitive.

Scientific Receipt. Does TRE reduce psychological distress in a controlled setting? A randomized controlled pilot of 60 nurses in South Korea found that a 6-week TRE program significantly reduced perceived stress and improved sleep quality compared with a control group, with medium effect sizes. Sample was small and single-site, and the intervention was not blinded. Heath et al., Complementary Therapies in Clinical Practice, 2018.

A pattern that shows up across multiple pilots: participants report reductions in anxiety, better sleep, and less low back pain. Objective measures (cortisol, heart rate variability) have been examined in a handful of small studies with mixed results. Some show HRV improvement consistent with parasympathetic dominance. Some show nothing measurable at the group level despite subjective improvement.

This is a common pattern in somatic and mind-body research. Subjective outcomes move first and most reliably. Objective biomarkers move less predictably, either because the effect is smaller than the noise, because the measurement window is wrong, or because self-report captures something the biomarkers do not.

Scientific Receipt. Does neurogenic tremoring change autonomic markers? A small controlled study using heart rate variability (HRV) as an autonomic proxy found modest increases in high-frequency HRV (a vagal-tone marker) immediately after TRE sessions compared with a rest control. Effects were short-lasting and the sample was 30 participants, so generalizability is limited. Berceli et al., Global Advances in Health and Medicine, 2014.

The honest summary: TRE probably does something. What it does, how much, for whom, and through what mechanism is still being worked out. If you are looking for the evidence base you would want before FDA approval of a drug, it is not there. If you are looking for a plausible, low-cost self-regulation practice with early positive signals and low risk for most people, it qualifies.

For a broader look at how somatic practices like TRE sit inside the current science, our post on what somatic therapy actually is walks through the evidence and the honest gaps.

Why the psoas keeps coming up

Practitioners of TRE talk about the psoas the way practitioners of breathwork talk about the diaphragm. The psoas is a deep hip flexor that runs from the lumbar spine through the pelvis to the femur. It is one of the few muscles that connects the upper body directly to the lower body through the core.

The clinical claim is that the psoas is a “fight or flight muscle” that shortens under chronic stress. There is real anatomy behind this. The psoas is functionally engaged when you brace, curl forward, or prepare to run. It sits next to major branches of the lumbar plexus and near the diaphragm’s crura. Chronic tension in the psoas is associated in the clinical literature with low back pain and altered gait patterns.

Whether TRE tremors specifically release the psoas, as Berceli’s model claims, is harder to verify. Electromyography during TRE sessions is scarce. What we can say is that the tremor pattern typically starts in the pelvic and inner-thigh region and often produces reports of pelvic and lumbar release afterward. Whether that release is psoas-specific or a broader parasympathetic effect that reduces global bracing is an open question.

For people with chronic low back pain that has not responded to standard physical therapy, TRE is one of the more interesting things to try. Not because the mechanism is proven, but because the risk is low and the reports are consistent enough to warrant a real look.

How to try it (safely)

The full seven-exercise TRE sequence is best learned from a certified provider or from Berceli’s book, “Shake It Off Naturally.” A stripped-down version you can try at home to see if your body responds:

1. Stand with your feet parallel, hip-width apart. Rise onto the balls of your feet and hold for one minute. Lower.
2. Do a wall sit at about 90 degrees of knee flexion for as long as you can hold it without collapsing, up to about two minutes. Come out slowly.
3. Lie on your back on a firm surface. Place the soles of your feet together and let your knees drop open in a butterfly position for two minutes.
4. Bring your knees together until they are about a fist’s width apart, feet still flat on the floor with the outer edges of your feet aligned with the outside edges of your hips. Hold.

Somewhere in that final position, if the setup worked, the inner thighs will begin to quiver. The quivering may build into a rhythmic tremor that spreads. Let it. Do not direct it. If it feels like too much, straighten your legs, breathe, and stop.

Ground rules that matter:

• Start short. Five minutes of tremoring is enough for a first session. Never more than fifteen.
• Never longer than every other day at first. More often flares people up.
• Stop if you feel activated, not calmed. TRE should leave you feeling looser and more settled. If it leaves you jittery, agitated, or emotionally raw, you did too much or you should not be self-practicing.
• Do not do this if you have a significant trauma history. For complex PTSD, dissociation, or a history of psychiatric hospitalization, work with a certified TRE provider. Uncontrolled autonomic activation is not a small thing.

TRE also pairs poorly with fatigue. If you have not slept, if you are ill, or if you are already at the edge of your window of tolerance, skip the session. The point is to widen the window, not to blow through it.

When TRE fits into a nervous system practice

TRE is not a replacement for slow, cumulative regulation practices like breath work, cold exposure, or graded exercise. It is a specific tool for a specific job: discharging residual sympathetic activation and unwinding chronic muscular bracing. It fits well inside a broader regulation practice, and poorly as a standalone rescue technique.

A reasonable weekly structure for someone building a somatic practice might look like:

• Daily: paced breathing (about six breaths per minute), morning light, some kind of movement.
• Two or three times a week: a longer parasympathetic protocol (extended exhale breathing, humming, cold water on the face) drawn from somatic exercises for anxiety.
• Once or twice a week: TRE, 10 to 15 minutes.

The goal is not to hit every practice hard. The goal is to give the nervous system enough consistent, low-intensity signal that regulation becomes the default state rather than the exception.

If you are earlier in this work, or want a more structured place to start, our free Vagal Reset guide sequences a first fourteen days of practices to build the baseline.

What this actually means

TRE is a promising, low-cost, low-risk self-regulation tool with a small but positive evidence base and an unresolved mechanism story. It probably works for many people to reduce felt stress, muscle tension, and low back pain. It is not a proven trauma cure, and it is not appropriate for everyone.

If you have a healthy nervous system and want to try something that meets your body where it holds tension, TRE is worth an honest experiment. Start short, go slowly, and pay attention to how you feel the day after, not just the ten minutes after.

If you have a complex trauma history, do not self-experiment. Find a certified provider. The tremor mechanism is real. So is the possibility of pushing an already dysregulated system further out of range.

The larger point is one that applies to most somatic practices: the body has regulation capacities the mind cannot access directly. Practices like TRE are useful to the extent that they give those capacities a path to run. Whether they are the fastest path, or the best path for you, is something only your own honest experimentation, ideally alongside a good clinician, will tell you.