Stomach Breathing: How To Calm Your Nervous System Through The Vagus Nerve

When panic hits, your body can take over. Your heart races, your chest tightens, and your thoughts become harder to organize. In that moment, thinking your way out of stress may not be possible. What you can do is breathe.

But not just any breath. Stomach breathing is a simple diaphragmatic breathing technique that helps regulate the nervous system by supporting the body’s natural relaxation response.

This simple technique can help shift you away from the stress response and toward a greater sense of internal safety. Even a few rounds can interrupt stress and help your system return to a more balanced state.

Why Stomach Breathing Works

The vagus nerve connects your brain to your heart, lungs, and digestive system. Through its connections with the autonomic nervous system, it plays an important role in helping your body respond to changes in stress and safety.

The nervous system responds not only to thoughts, but also to rhythm, breathing patterns, and physical signals of safety. That is why stomach breathing can be so effective. It provides your body with a calming signal through a slow, controlled breathing pattern.

Learn more about how this works in our Polyvagal Theory overview, which explains how the nervous system responds to safety and stress cues.

When Your Nervous System Stays In Stress Mode

Stress can affect both your body and your thoughts. Common signs include:

• Short, shallow breaths
• Racing thoughts
• Muscle tension
• A need to escape
• Numbness or shutdown

This is the body’s natural response to perceived danger. Depending on the situation and intensity, stress can appear as mobilization (fight-or-flight) or withdrawal and shutdown.

Without signals of safety, the body may remain in a heightened state of stress.

In Polyvagal Theory, this calming influence is sometimes described as the “vagal brake.” When engaged, the vagal brake helps regulate the nervous system and supports a shift from stress toward greater calm, connection, and control.

How To Practice Stomach Breathing

Stomach breathing is one of the most useful skills for developing control during stressful moments. It is used by professional speakers, singers, athletes, and martial artists, and it works just as well for everyday situations.

You can practice stomach breathing while sitting, standing, or lying down. The goal is to focus on your breath and allow your body to remain relaxed.

This technique is adapted from the Watch Your Back program:

Get into a comfortable position

Take a moment to settle in and bring your attention to your breathing.

Inhale slowly through your nose to the count of four

As you breathe in, gently allow your stomach to expand. This creates space for your diaphragm and lungs to work naturally.

Hold the breath briefly

Exhale slowly through your mouth to the count of eight

Allow your stomach to fall naturally as the air leaves your body.

Repeat

Keep the breath smooth and relaxed. Do not force anything. Stay present and steady.

You have just practiced stomach breathing, a simple way to support nervous system regulation and restore calm.

If you find yourself pulling your stomach inward during the inhale, you may be tightening the muscles around your diaphragm. Allowing your stomach to expand helps create space for a fuller, more relaxed breath.

Learn more in 3. Soft Stomach Breathing from In The Zone Skills Training.

Why This Supports Nervous System Regulation

Stomach breathing supports the body’s ability to regulate stress and return to a calmer state. It may help:

• Lower heart rate
• Reduce muscle tension
• Improve emotional regulation
• Restore access to calm, focused thinking

It is especially useful during moments of acute stress when you do not have time for longer practices like Relaxation Therapy.

Practice Builds Resilience

Stomach breathing can help in the moment, but regular practice also strengthens your ability to recover from stress.

Over time, your body becomes more familiar with the breathing patterns associated with relaxation and control. This creates a foundation for better self-regulation.

When you are ready to go deeper, Relaxation Therapy offers a guided meditation experience that uses breath, rhythm, and awareness to support relaxation.

In The Moment, Start Here

If you feel overwhelmed, begin with one breath:

Inhale through your nose. Let your stomach expand.
Exhale slowly. Let it fall.
Repeat.

You do not have to think your way out of stress. You can begin by changing your breathing.

To learn more about how breath and rhythm support relaxation, read The Science Behind Relaxation Therapy.