Nervous system basics, the window of tolerance

If you only learn one thing about your nervous system, learn the window of tolerance.

The window

Inside the window, you are present. You can think, feel, choose, and stay with what is in front of you. The breath is full. The body is settled. Hard things still happen, but you can meet them.

Above the window is hyperarousal. Anxious, wired, racing, angry, panicked. The breath is high in the chest. Sleep is thin. The body is braced.

Below the window is hypoarousal. Numb, flat, foggy, far away. The breath is shallow. Energy is gone. Nothing reaches.

Most people live partly outside the window and do not realise it.

What pushes you out

Lack of sleep. Skipped meals. Alcohol. Unfinished conversations. Old material that was never met. A nervous system that learned, very early, that the world was not safe.

What brings you back

Slow exhale. Cold water on the face. Walking. Eye contact with someone you trust. Putting a hand on the chest. Therapeutic practice that lets the held material complete.

This is not a hack. It is literacy. Once you can name the state, you can choose the tool.

• If sleep is the bottleneck, start with how sleep regulates the nervous system.
• If the voice in your head will not stop, IFS and the inner critic.
• If you want a way to work directly with the held material, therapeutic breath retraining.

Where to begin

If you want to learn to hold this work for others, see the practitioner training. For the wider frame, why we see the whole person.