The window of tolerance
Your optimal zone of arousal — and how to widen it
The window of tolerance is the range where you can think and feel at the same time without becoming overwhelmed or shutting down. Knowing where you are — and how to come back — is central to emotional regulation and to EMDR therapy.
Select each zone to see how it feels and what helps. Drag the control to see how regulation resources widen your window.
Wide window: with regulation resources you tolerate more without becoming overwhelmed or shutting down.
Window of tolerance
· Your optimal zoneHow it feels
- Present and grounded
- Able to think and feel at the same time
- Emotions are intense but manageable
- Connected to yourself and others
To hold and widen your window:
What is the window of tolerance?
The window of tolerance is a concept developed by psychiatrist Daniel Siegel to describe the optimal zone of arousal in which we function best. Inside that window you can think and feel at the same time: emotions may be intense, but they remain manageable and you stay connected to yourself and others.
When something overwhelms us, we can leave the window from the top or the bottom. Above it we enter hyperarousal (fight or flight): anxiety, panic, anger, racing thoughts. Below it we enter hypoarousal (freeze or shutdown): numbness, disconnection, emptiness, fatigue. In the tool above you can explore how each zone feels and what helps you return.
Most importantly: the window is not fixed. Sustained stress and trauma narrow it (you leave it more easily), while regulation resources widen it (you tolerate more without becoming overwhelmed or shutting down). Widening the window is one of the main goals of therapeutic work.
How to return to your window
- 1
Notice where you are. Observe your body's signals: is it revved up and tense (hyperarousal) or shut down and disconnected (hypoarousal)?
- 2
If you are in hyperarousal, bring activation down. Techniques like 4-7-8 breathing or the Safe Place help calm the nervous system.
- 3
If you are in hypoarousal, gently re-activate. Sensory grounding, like the 5-4-3-2-1 technique, or movement bring you back to the present.
- 4
Practice when you are well, not only in crisis. The more you train these resources while calm, the easier they are to reach when you need them — and the more your window widens over time.
The window of tolerance in EMDR therapy
In EMDR, reprocessing a memory only works well within the window of tolerance. If a patient moves into hyperarousal or hypoarousal during a session, the therapist pauses processing and uses stabilization resources (the ones learned in Phase 2 of the protocol) to bring them back into their window before continuing.
That is why psychoeducation about the window — together with resources like the Safe Place or the Butterfly Hug — is the foundation of the work that precedes reprocessing. Knowing your window also helps day to day: it lets you understand your reactions and choose what helps you regulate. If you find it hard to return to your window, or the distress is intense or persistent, seek a professional's support; this resource does not replace clinical assessment.
Evidence and references
- Siegel, D. J. (2020). The Developing Mind: How Relationships and the Brain Interact to Shape Who We Are (3rd ed.; original work published 1999). Guilford Press.
- Corrigan, F. M., Fisher, J. J., & Nutt, D. J. (2011). Autonomic dysregulation and the window of tolerance model of the effects of complex emotional trauma. Journal of Psychopharmacology, 25(1), 17-25.
- Ogden, P., Minton, K., & Pain, C. (2006). Trauma and the Body: A Sensorimotor Approach to Psychotherapy. W.W. Norton.
Frequently asked questions
This resource is a complementary tool and does not replace therapy with a qualified professional. If you experience significant distress, contact your therapist.
