Breathing and the Nervous System: Pain, Anxiety, and Stress

Breathing is something we do automatically every day, often without giving it much thought. But breathing is far more than just getting oxygen into the body, it is deeply connected to the nervous system and can significantly influence pain, anxiety, stress levels, and overall well-being.

The way we breathe can either help calm the body or keep it stuck in a heightened state of tension and alertness. Understanding this connection can be an important step toward improving both physical and mental health.

The Nervous System and the Stress Response

The autonomic nervous system controls many automatic functions in the body, including heart rate, digestion, and breathing. It has two main branches:

• The sympathetic nervous system — often called the “fight or flight” system
• The parasympathetic nervous system — often called the “rest and digest” system

When the body perceives stress, the sympathetic nervous system becomes more active. Heart rate increases, muscles tighten, breathing becomes faster, and the body prepares to react.

This response is helpful during short-term danger, but many people remain in this heightened state for long periods of time due to chronic stress, anxiety, pain, poor sleep, or demanding lifestyles.

One of the most noticeable changes during stress is breathing.

How Stress Changes Breathing Patterns

When people are anxious or stressed, breathing often becomes:

• Faster
• Shallower
• More chest-dominant
• Less coordinated

Instead of using the diaphragm efficiently, many people begin relying heavily on muscles in the neck, shoulders, and upper chest to breathe.

This can create a cycle where:

1. Stress changes breathing patterns
2. Altered breathing increases tension in the body
3. The nervous system becomes even more sensitive
4. Symptoms like pain, anxiety, and fatigue increase

Over time, dysfunctional breathing patterns may contribute to:

• Neck and shoulder tension
• Headaches
• Jaw clenching
• Fatigue
• Dizziness
• Difficulty concentrating
• Increased feelings of anxiety
• Poor sleep quality

The Link Between Breathing and Pain

Pain and breathing are closely connected.

When someone is in pain, they often unconsciously hold their breath or breathe more shallowly. This protective response can increase muscle tension and reduce movement through the rib cage and diaphragm.

At the same time, persistent pain can keep the nervous system in a more protective, sensitized state. The body becomes more alert and reactive, which may amplify pain perception.

Improving breathing patterns can help by:

• Reducing muscle guarding and tension
• Improving relaxation
• Supporting nervous system regulation
• Enhancing movement through the rib cage and trunk
• Helping the body feel safer and less threatened

Breathing exercises alone are not a cure for pain, but they can be an important part of a comprehensive treatment approach. This article dives in further to explain the mechanisms behind breathing and pain.

Why the Diaphragm Matters

The diaphragm is the primary breathing muscle and plays an important role in both breathing and nervous system regulation.

When functioning well, the diaphragm:

• Allows for efficient, deep breathing
• Coordinates with the pelvic floor and abdominal muscles for trunk stability
• Helps regulate pressure within the abdomen
• Encourages activation of the parasympathetic nervous system

Diaphragmatic breathing often creates a calming effect because slower, more controlled breathing sends signals to the brain that the body is safe.

Breathing and Anxiety

Anxiety often changes breathing patterns before people even realize it.

Some individuals begin over-breathing or hyperventilating during periods of stress, even if they do not feel obviously short of breath. This can alter carbon dioxide levels in the body and contribute to symptoms such as:

• Lightheadedness
• Chest tightness
• Tingling sensations
• Feeling unable to take a satisfying breath
• Increased panic or fear

Learning how to slow breathing and improve breathing mechanics can help reduce this cycle and create a sense of control during stressful situations. Want to learn more about how breathing and anxiety are linked? This article explains it all.

Simple Strategies to Support Nervous System Regulation

1. Slow Your Exhale

A longer exhale tends to stimulate the parasympathetic nervous system and encourage relaxation.

2. Practice Diaphragmatic Breathing

Focus on allowing the lower rib cage and abdomen to gently expand during breathing rather than lifting through the chest and shoulders. Learn all about diaphragmatic breathing here.

3. Improve Rib Cage Mobility

Restricted movement through the thoracic spine and ribs can limit breathing efficiency and contribute to tension. Check out these quick exercise that will help improve mobility.

4. Reduce Unnecessary Muscle Tension

Many people overuse neck and shoulder muscles when breathing. Addressing posture, movement habits, and tension patterns can help.

5. Incorporate Movement

Walking, mobility exercises, and gentle exercise can help regulate both breathing and the nervous system.

Breathing Is Not “Just Stress”

Many people are told their symptoms are “just stress” or “just anxiety.” But breathing pattern dysfunction is very real and can have meaningful physical effects on the body.

Assessing breathing mechanics, posture, movement patterns, and nervous system regulation can provide valuable insight into persistent symptoms such as pain, fatigue, tension, and feelings of overwhelm.

At Move Authentically Physiotherapy in Kingston, we assess breathing patterns as part of a whole-body approach to treatment. Our training in breathing pattern disorders helps us support individuals dealing with pain, stress, anxiety, tension, and difficulty regulating their nervous system. Book your appointment today to start feeling better.