Many people experiencing anxiety and insomnia expect sleep to arrive once they go to bed.

The body is tired. The day has ended. The intention to sleep is there.

Yet something does not shift.

For some, the mind becomes active. Thoughts begin moving, replaying conversations, planning, analysing, or looping without pause.

For others, there are no obvious thoughts at all.

The mind feels quiet, yet sleep does not come. The body lies still, eyes closed, waiting. Time passes, and the nervous system remains awake.

Both experiences are common in anxiety and insomnia.

And both point to the same underlying process.

Why Anxiety and Insomnia Are Closely Linked

Anxiety and insomnia are deeply connected through the nervous system.

The nervous system is designed to keep the body safe. When it senses threat or uncertainty, it increases alertness, sharpens awareness, and prepares the body to respond.

This state of alertness is useful during the day when action is required.

At night, however, it interferes with sleep.

Sleep requires the nervous system to release vigilance. It requires a shift from alertness into a state where the body feels safe enough to let go.

When anxiety is present, this shift can become difficult.

The system continues monitoring, scanning, and remaining prepared, even when there is no immediate reason to do so.

Why the Mind Won’t Switch Off

When the nervous system remains alert, the mind often follows.

Thinking increases because the system is still active. The mind begins scanning for problems, replaying events, or anticipating what might happen next.

In this state, thoughts are not random.

They are a reflection of an activated nervous system.

Trying to stop the thoughts directly can feel frustrating, because the source of the activity sits deeper in the body.

As the nervous system settles, the mind naturally becomes quieter.

Why You Can Lie Awake Without Thoughts

Not everyone experiences racing thoughts.

Many people with anxiety and insomnia describe lying awake in complete stillness, with little or no mental activity, yet feeling unable to fall asleep.

This can be confusing.

If the mind is quiet, why does sleep not come?

In these moments, the nervous system may still be holding a subtle level of alertness.

The body has not yet fully shifted into the state required for sleep. There is a sense of waiting, of being awake without a clear reason.

This experience is just as much a reflection of nervous system dysregulation as racing thoughts are.

Sleep does not depend only on the absence of thinking.
It depends on the presence of safety within the body.

Why Sleep Cannot Be Forced

One of the most common responses to insomnia is to try harder to sleep.

Earlier bedtimes.
Numbing medications. 
Greater effort to relax.

Yet sleep is not something that can be controlled directly.

Sleep emerges when the nervous system reaches a state where vigilance is no longer required. It is a natural process that unfolds when the body feels safe enough to let go.

When the system remains even slightly alert, sleep may stay out of reach.

This is why effort alone often does not resolve anxiety and insomnia.

The Role of the Nervous System in Sleep

Understanding nervous system regulation provides a different way of approaching sleep.

Rather than focusing only on techniques or habits, the focus shifts toward the conditions that allow the nervous system to settle.

Through my work with anxiety and insomnia, I describe these conditions as the Six Foundations of Regulation:

• Safety
• Attachment
• Authenticity
• Connection
• Agency
• Rhythm

These foundations shape how the nervous system responds to stress, how it settles, and how easily it can move into sleep.

When one or more of these foundations are under strain, the system may remain alert even when the body is tired.

You can read more about this here: https://www.project-pure.com/blog/anxiety-insomnia-nervous-system-regulation

Restoring Sleep Through Nervous System Regulation

When the nervous system begins to experience safety again, even in small ways, it gradually learns that constant vigilance is no longer required.

This shift does not happen through force.

It happens through restoring the conditions that support regulation.

As this process unfolds, many people notice that:

The body begins to settle more easily.
The transition into sleep becomes smoother.
Waking during the night becomes less frequent.
A sense of calm returns to the nervous system.

A Different Way to Understand Anxiety and Insomnia

Anxiety and insomnia are often signals from a nervous system that has learned to remain alert.

Whether this shows up as racing thoughts or simply lying awake in stillness, the underlying process is the same.

The system is still holding a level of vigilance.

As the nervous system begins to regulate, the need for that vigilance gradually decreases.

Sleep becomes easier to access.
The body begins to trust rest again.
Nights become quieter.

Understanding this relationship between anxiety, insomnia, and the nervous system offers a pathway toward restoring natural sleep.

If you would like support with anxiety and insomnia, you can learn more about Deep Release Therapy (DRT) through Project Pure or explore upcoming talks on nervous system regulation and sleep.

About the Author

Annelies Basten, MPsych, is a psycho-somatic therapist and founder of Project Pure. Her work focuses on nervous system regulation and the restoration of healthy sleep.

Drawing from psychology, trauma-informed therapy, meditation, and her own lived experience of recovering from chronic insomnia, she supports people experiencing anxiety and sleep difficulties through a therapeutic approach called Deep Release Therapy (DRT).

Annelies works with clients in Christchurch (in-person or online), helping them restore the foundations of regulation so the nervous system can settle and natural sleep can return.