Why are doctors and physiologists increasingly teaching patients a specific way of breathing?

Could the way we breathe affect our heart rate, stress levels, and even digestion?

And why do many experts recommend something called diaphragmatic breathing?

Also known as belly breathing, Diaphragmatic Breathing focuses on using the diaphragm — the large muscle just below the lungs.

But here’s the surprising part.

Many adults rarely use this muscle properly when breathing.

Instead, they rely on shallow chest breathing, especially during stress.

And this simple shift in breathing patterns can quietly influence several systems in the body.

The Muscle That Controls Breathing

The diaphragm is a dome-shaped muscle located just below the lungs.

When it contracts, it moves downward, allowing the lungs to expand and fill with air.

When it relaxes, the lungs push air out.

In diaphragmatic breathing, the diaphragm does most of the work.

As the diaphragm moves downward, the abdomen gently expands outward — which is why this technique is often called belly breathing.

But many people unconsciously switch to shallow breathing that mainly moves the chest.

This type of breathing is common during stress, anxiety, or prolonged sitting.

And that difference may influence how the body responds to stress.

The Connection With the Nervous System

Breathing is closely connected to the body’s autonomic nervous system.

This system controls two important responses:

• the stress response

• the relaxation response

Slow diaphragmatic breathing stimulates the Parasympathetic Nervous System, which promotes relaxation.

This helps reduce the activity of the Sympathetic Nervous System, the system responsible for the “fight-or-flight” response.

When the relaxation response becomes active, several changes may occur in the body:

• heart rate slows

• blood pressure may decrease

• muscle tension reduces

• breathing becomes deeper and calmer

But the benefits may extend beyond stress reduction.

Effects on the Heart and Circulation

Slow, deep breathing can also influence cardiovascular function.

Research suggests that diaphragmatic breathing can improve something called heart rate variability, a measure of how flexibly the heart responds to stress.

Higher heart rate variability is generally associated with better cardiovascular resilience.

Deep breathing also improves oxygen exchange in the lungs.

Because the lower parts of the lungs contain more blood vessels, diaphragmatic breathing can improve oxygen delivery to the bloodstream.

This may help support better energy levels and overall circulation.

But another system in the body may benefit as well.

The Digestive Connection

The diaphragm sits directly above the abdominal organs.

When the diaphragm moves during deep breathing, it gently massages organs such as the stomach, liver, and intestines.

This movement may help stimulate digestive activity and improve blood flow to these organs.

This is one reason breathing techniques are sometimes recommended in conditions related to digestive discomfort or stress-related digestive symptoms.

But the most important question is practical.

How can someone actually practice diaphragmatic breathing correctly?

Actionable Steps

Here is a simple way to begin practicing diaphragmatic breathing.

1. Start in a Comfortable Position

Lie down or sit comfortably with your shoulders relaxed.

Place one hand on your chest and the other on your abdomen.

This helps you notice how your body moves while breathing.

2. Breathe Slowly Through the Nose

Take a slow breath through your nose.

Focus on allowing the abdomen to expand outward as the diaphragm moves downward.

The hand on your belly should rise more than the hand on your chest.

3. Exhale Slowly

Gently breathe out through the mouth or nose.

As you exhale, the abdomen should fall inward as the diaphragm relaxes.

Try to keep the chest relatively still.

4. Slow the Breathing Rhythm

A helpful rhythm is:

• inhale for about 4 seconds

• exhale for about 6 seconds

This slower breathing pattern helps activate the body’s relaxation response.

Practicing for 5–10 minutes daily can help the body gradually adopt this breathing pattern more naturally.

Many people begin to notice reduced stress and improved relaxation over time.

But here’s something fascinating.

New research suggests that the timing of breathing may also influence brain activity, memory, and emotional regulation.

In other words, the simple act of breathing might not only affect the body…

…it may also change how the brain processes stress and focus.

And scientists are now studying whether certain breathing patterns could improve sleep and concentration.

That’s something we’ll explore in another discussion

Contact us

Whether you have a request, a query, or want to work with us, use the form below to get in touch with our team.