The Lost Art of Breathing

Why something we do 20,000 times a day may be the key to better health.

By Jocelyn Kate | JustJocelynThings – Nurturing Minds, Bodies, and Imaginations

The first thing we do when we are born is inhale.

The last thing we do before we die is exhale.

Between those two moments, breath quietly carries us through every experience we will ever have. And yet most of us barely notice it. We build entire lives while this invisible rhythm keeps moving underneath everything: friendships, grief, deadlines, love, nervous system spirals, moments of awe. All of it happens on top of breath.

Breathing is designed to be automatic. It’s regulated by the autonomic nervous system through respiratory centers in the brainstem, primarily in the medulla oblongata and pons, which continuously monitor oxygen, carbon dioxide, and blood pH to maintain balance without conscious effort (Feldman, Del Negro & Gray, 2013).

In other words, breathing runs in the background.

If we had to consciously think about every breath we took, survival would be impossible. Evolution solved that by automating it.

But breathing is also unique.

It is one of the few autonomic processes we can consciously control. Heart rate, digestion, immune regulation, hormone release — most of that is outside our awareness. Breath sits in the middle. It’s automatic, but we can step in and change it at any time.

And when we do, something remarkable happens.

We gain a direct pathway into our physiology.

Research shows breathing patterns can influence heart rate variability, blood pressure, emotional regulation, and nervous system activity (Russo, Santarelli & O’Rourke, 2017). Slow breathing in particular supports parasympathetic activity — the branch associated with rest, recovery, digestion, and repair.

This is why breath is so powerful: it is not just “calming.” It is regulating.

And yet, most of us were never taught how to breathe well.

We learn how to brush our teeth, how to read, how to eat well, how to exercise, how to be productive. But no one really explains how breathing works — or how our breathing habits quietly shape our health.

Instead, many of us develop unconscious patterns shaped by stress, posture, sleep, allergies, and modern lifestyles: chest breathing, mouth breathing, fast breathing, breath holding under tension. Over time, dysfunctional breathing patterns can contribute to headaches, anxiety, poor sleep, oral health issues, and chronic nervous system activation (Courtney, 2009).

What fascinates me most is that breath is both ordinary and profound at the same time.

It is the simplest biological function we have.

And it can reshape the state of the entire body.

The deeper I went into learning about breath, the more I realized something interesting.

Humans have been exploring the power of breathing for thousands of years. Modern science may be catching up now, but the relationship between breath, health, and awareness has been part of human traditions for a very long time.

Breath as Medicine: What Ancient Cultures Already Knew

Long before laboratories and clinical trials, many cultures treated breath as a form of medicine.

Breath wasn’t just air.

It was life itself.

In ancient India, yogic traditions described breath as prana, a Sanskrit word often translated as life force. Practices developed to regulate it were called pranayama, often described as expanding or controlling life force through breath.

Pranayama appears in ancient yogic texts like the Yoga Sutras of Patanjali and later in the Hatha Yoga Pradipika, where breath control is described as essential for balancing the body and calming the mind (Jerath et al., 2006).

In China, practices like Qi Gong and Tai Chi centered around cultivating qi (chi) — a vital energy linked to breath, circulation, resilience, and longevity. Breath was not separate from health; it was the gateway into it.

Even in ancient Greece, the concept of pneuma — the “breath of life” — was used to describe the animating force of the body and mind.

Across these traditions, separated by geography and time, the message was consistent:

Breath is a bridge between body and mind.

Modern science is beginning to explain why.

Breathing patterns directly influence the autonomic nervous system — the system responsible for regulating heart rate, digestion, stress response, and immune signaling. Slow breathing has been shown to stimulate the vagus nerve, a major pathway for parasympathetic activation and recovery (Russo et al., 2017).

In other words: ancient cultures may have been “prescribing” breathing practices that influenced physiological systems we can now measure.

Breath wasn’t a wellness trend.

It was a life practice.

The Biology of Breath: How Oxygen Becomes Energy

To understand why breath matters so much, it helps to look at what happens inside the body with every inhale.

Air travels into the lungs and reaches millions of tiny air sacs called alveoli. The lungs contain roughly 300–500 million alveoli, creating a massive surface area for gas exchange — roughly the size of a tennis court if spread out (Weibel, 2009).

In the alveoli, oxygen diffuses into the bloodstream, binds to hemoglobin, and is transported to tissues throughout the body.

Inside our cells, oxygen supports cellular respiration, where mitochondria convert nutrients into ATP, the energy currency powering nearly everything: muscle contraction, brain function, immune repair, metabolism, detoxification, tissue healing.

Without oxygen, ATP production stops.

This is why breathing is the most immediate requirement for life.

We can survive weeks without food.

Days without water.

But only minutes without oxygen.

Here’s the part most people don’t learn in school:

Oxygen is only half the story.

Carbon dioxide matters too.

For many years, CO₂ was treated as a waste gas. But physiology tells a more complex story. CO₂ helps regulate breathing drive and influences oxygen delivery through something called the Bohr Effect — the principle that carbon dioxide levels affect how easily oxygen is released from hemoglobin into tissues (Bohr, Hasselbalch & Krogh, 1904).

This means that breathing too fast all day (over-breathing) can lower CO₂ too much — which can actually reduce oxygen delivery efficiency.

Breathing more is not always better.

Many people unknowingly breathe too quickly or too shallowly due to stress, posture, sedentary living, and constant stimulation. Chronic over-breathing has been associated with fatigue, anxiety, dizziness, headaches, and reduced exercise tolerance (Courtney, 2009).

Healthy breathing tends to be slow, nasal, and diaphragmatic.

And that’s how babies breathe.

Which raises a real question:

If humans are born breathing perfectly… why do so many of us forget how?

When We Forget How to Breathe

Watch a baby sleeping.

Their belly rises and falls.

The breath is slow, rhythmic, effortless.

The diaphragm moves fully, filling the lower lungs.

Babies breathe the way human bodies are designed to breathe.

But breathing changes as we grow.

Stress tightens the body.

Posture collapses.

We sit for hours.

We live in our heads.

Allergies and congestion nudge us toward mouth breathing.

Modern life quietly reshapes the breath.

Research suggests a large portion of the population experiences some form of chronic dysfunctional breathing, often without realizing it (Boulding et al., 2016). These patterns can include shallow breathing, breath holding during stress, rapid breathing, and habitual mouth breathing.

And those patterns influence the nervous system.

Shallow chest breathing tends to activate the sympathetic nervous system, keeping the body in fight-or-flight. When that becomes chronic, the body can live in a low-grade stress state: tense muscles, faster heart rate, altered digestion, poorer sleep, increased inflammation.

Breathing is powerful because it works both ways:

Stress changes the breath.

And the breath can change stress.

Slow breathing patterns stimulate vagal activity and shift the body toward relaxation and recovery (Jerath et al., 2015). This is why breathing practices show up everywhere: yoga, meditation, trauma therapy, somatic work, athletic training.

I didn’t realize how much my breath was shaped by stress until I started paying attention.

For years, I held my breath when I was overwhelmed. It was subtle. Sometimes people would literally point it out.

“Are you breathing?”

At first I laughed.

But when I started noticing it, I couldn’t unsee it. When I was concentrating, anxious, or emotionally bracing, my breathing would almost disappear.

My body had learned to freeze instead of breathe.

Now when I catch it, something simple shifts everything.

I pause.

I inhale slowly through my nose.

I let my belly expand.

Then I exhale slowly.

Within seconds, my shoulders soften. My mind clears. It feels like oxygen returns to places that were waiting for it.

Breath pulls me back into the moment.

Nose vs. Mouth: The Small Habit That Changes Everything

One of the simplest upgrades you can make is also one of the most overlooked:

Breathe through your nose.

The nose is designed for breathing. It filters pathogens and particles, humidifies and warms air, and adds resistance that naturally slows breathing and encourages diaphragmatic movement.

Even more interesting: the sinuses produce nitric oxide, which mixes into the air we inhale through the nose. Nitric oxide helps widen blood vessels and improves oxygen uptake and circulation (Lundberg & Weitzberg, 1999).

Mouth breathing bypasses these benefits. Over time, it can contribute to dry mouth, increased cavity risk, sleep disturbances, airway issues, and snoring (Jefferson, 2010). In children, chronic mouth breathing has been associated with changes in facial development and jaw structure.

This is deeply personal for me because I used to mouth breathe at night.

And I actually trained myself out of it in the most random way: embarrassment.

At sleepovers, friends teased me about mouth breathing. I didn’t want to be “the mouth breather.” So I started practicing nasal breathing before falling asleep.

Night after night, I kept my mouth closed and focused on breathing through my nose.

Eventually, it became my default.

Years later, I learned this is now a whole thing — people intentionally retrain nasal breathing during sleep, sometimes even using gentle mouth tape as a training tool.

When nasal breathing becomes consistent, a lot of people report waking up more rested and energized. That makes sense, because breathing patterns influence sleep quality and nervous system recovery.

Where we breathe from shapes how we live.

Breathwork: Calming, Energizing, and Everything In Between

Once a healthy breathing foundation is established, the world of breathwork opens up into something much bigger.

Across cultures, traditions, and modern wellness spaces, people have developed many different ways of working intentionally with breath. Some practices are slow and grounding. Others are energizing. Some are designed to regulate the nervous system, while others intentionally push the body into controlled stress before releasing it.

There are many forms of breath practices, including:

Coherent breathing
Box breathing
Diaphragmatic breathing
Pranayama
Ujjayi breathing (often used in yoga)
Alternate nostril breathing
Breath of fire
4-7-8 breathing
Buteyko breathing
The Wim Hof method
Somatic breathwork
Holotropic breathwork
Cyclic sighing
And many others.

While these techniques can look very different on the surface, physiologically many of them fall into two broad categories.

Downregulating practices, which calm the nervous system and support relaxation.

And upregulating practices, which stimulate the body, increase alertness, and temporarily activate the stress response.

Slow breathing practices — like coherent breathing, diaphragmatic breathing, and many forms of pranayama — tend to increase parasympathetic activity. These practices stimulate the vagus nerve, lower heart rate, and promote a state of calm and physiological balance (Russo et al., 2017). This is why slow breathing is often used in meditation, yoga, and therapeutic settings for stress regulation.

Other techniques work in the opposite direction.

Faster breathing practices can temporarily shift blood chemistry by lowering carbon dioxide levels and altering blood pH. These changes can create sensations like tingling in the hands or face, lightheadedness, increased alertness, or emotional release.

One measurable phenomenon that sometimes occurs during intense breathwork is called tetany, where the hands or feet may curl inward due to changes in blood alkalinity and calcium availability caused by reduced carbon dioxide levels (Boulding et al., 2016; Courtney, 2009).

Experiences like this are sometimes interpreted as purely energetic or spiritual, but they also have clear physiological explanations.

This does not mean these practices are harmful. When used intentionally and occasionally, they can be powerful tools for exploring the connection between breath, physiology, and emotional processing.

But like many things in health, context matters.

The goal of breathwork is not to constantly chase intense experiences or dramatic physiological states.

The real power of breath is much simpler.

It is learning to breathe well throughout everyday life.

Not just during a workshop.

Not just on a yoga mat.

But in the middle of a random Tuesday, when stress starts building and the body forgets to soften.

That is where the real medicine is.

Breath, Stress, and the Reset Button We Carry Everywhere

Every breath signals the brain about what state the body is in.

Fast breathing signals danger.

Slow breathing signals safety.

That’s why breath awareness can shift the nervous system so quickly.

And the body has built-in resets, too. Sighing helps reopen collapsed alveoli and restore breathing rhythm. There is even a specific neural circuit involved in sigh generation (Li et al., 2016).

Sometimes the body forces a sigh because it’s trying to recalibrate itself.

But we can choose it.

A slow inhale and long exhale can function as an intentional sigh — a nervous system reset you can do anywhere.

One breath.

One pause.

And the body starts to soften.

Sleep, Attention, and the ADHD Conversation

Breath also affects cognition.

The brain is oxygen-hungry. It is only about 2% of body weight but consumes around 20% of the body’s oxygen (Raichle & Gusnard, 2002).

Sleep-disordered breathing has been linked with learning and attention issues in children, including symptoms that can resemble ADHD (Gozal, 2008). This doesn’t mean ADHD is “just breathing,” but it does suggest that airway health and sleep quality can be an overlooked piece of the picture.

This part hits home for me.

I was diagnosed with ADHD in high school. The framework was neurological, medication-based, and very “this is how your brain is.”

But looking back, I also struggled with allergies and congestion. I was mouth breathing. My sleep may not have been as restorative as it could have been.

Years later, training my breath improved my focus in surprising ways.

Long breath holds require attention.

Slow breathing requires awareness.

Learning breath control trained my nervous system, and it trained my mind.

The Air Around Us

Breath is not only about what happens inside the body.

It is also about the air around us.

Every breath we take connects us directly to the environment we live in. The quality of the air we inhale can influence our energy levels, cognitive function, sleep, immune health, and overall well-being more than most people realize.

In modern life, many of us spend the majority of our time indoors. Offices, classrooms, homes, gyms, and buildings often rely on sealed windows and mechanical ventilation systems. While these systems are designed for efficiency, they often limit the amount of fresh air circulating through a space.

That means the air we breathe indoors is frequently recycled air.

Every time someone exhales, carbon dioxide is released into the room. In crowded spaces — conference rooms, classrooms, offices, airplanes — carbon dioxide levels can rise surprisingly quickly.

Research on indoor air quality has shown that elevated CO₂ levels can contribute to fatigue, headaches, difficulty concentrating, and reduced decision-making ability (Satish et al., 2012). In some studies, participants exposed to higher indoor carbon dioxide levels performed significantly worse on complex cognitive tasks.

This is one reason many people feel unusually tired or foggy in poorly ventilated environments.

Think about how you feel after sitting in a packed lecture hall, a long meeting in a sealed conference room, or a hotel room with windows that do not open.

That heavy feeling is not just psychological.

It is the air.

In spaces with many people, a measurable portion of the air we inhale may actually contain air that has already passed through someone else’s lungs. This is a normal part of shared environments, but it highlights how important ventilation and fresh air circulation really are.

Fresh air has real physiological effects.

Outdoor air tends to contain lower carbon dioxide levels and greater atmospheric circulation due to wind, plants, and natural environmental exchange. Even small increases in fresh air ventilation have been shown to improve cognitive performance, alertness, and overall comfort.

Plants also play an interesting role in the story of breath.

Through photosynthesis, plants absorb carbon dioxide and release oxygen back into the atmosphere. Some research has even examined the ability of indoor plants to help reduce certain airborne pollutants, although ventilation and airflow remain the most important factors for air quality (Wolverton, Johnson & Bounds, 1989).

Still, there is something deeply regulating about being around living systems.

Plants.

Trees.

Moving air.

Sunlight filtering through leaves.

Whether through measurable chemistry or something harder to quantify, being around nature tends to change how we feel.

Breath reminds us that we are not breathing in isolation.

Every inhale is part of a larger exchange happening between our bodies and the living world around us.

When we step outside and take a deep breath of fresh air, we are participating in the same atmospheric cycle that connects forests, oceans, plants, animals, and humans.

Breath becomes more than a personal biological process.

It becomes a relationship with the environment that sustains us.

And when we begin paying attention to breath, we often begin paying attention to that relationship as well.

Returning to the Breath

The more I learn, the more I realize breathing is not just a biological function.

It is a relationship.

A relationship between the nervous system and the present moment. Between body and mind. Between us and the world around us.

Plants absorb the carbon dioxide we exhale and release oxygen back into the atmosphere.

We inhale that oxygen and continue the cycle.

And the ocean plays an enormous role in that cycle. Phytoplankton — microscopic organisms floating near the surface of the sea — are responsible for producing a massive portion of the oxygen in our atmosphere. Some estimates suggest around half of the oxygen we breathe comes from these tiny living beings (Falkowski & Raven, 2007).

In many ways, the planet itself has lungs.

Forests.

Oceans.

Leaves.

Algae.

And every breath we take participates in that exchange.

Breath brings us back to ourselves.

But it also connects us to something larger — to nature, to the universe, to whatever greater force sustains life.

Some people call that nature.

Some call it consciousness.

Some call it God.

Whatever language we use, the experience is often the same: when we slow down and feel our breath, we remember that we belong here. We are not separate from life. We are participating in it.

And in a world that constantly pushes us to move faster, think harder, and do more, breath offers something different.

A pause.

A reset.

A way home.

Maybe that is why ancient traditions treated breath as medicine.

Not because it was complicated.

But because it was always there.

Free.

Accessible.

Waiting for us to remember it.

Sometimes the most powerful shift we can make is not adding another thing to our lives.

But returning to what we’ve been doing all along.

Taking one slow breath.

And then another.

References

Bohr, C., Hasselbalch, K., & Krogh, A. (1904). Concerning a biologically important relationship: the influence of carbon dioxide tension on the oxygen binding of blood. Skandinavisches Archiv für Physiologie.

Boulding, R., Stacey, R., Niven, R., & Fowler, S. J. (2016). Dysfunctional breathing: a review of the literature and proposal for classification. European Respiratory Review.

Courtney, R. (2009). The functions of breathing and its dysfunctions and their relationship to breathing therapy. International Journal of Osteopathic Medicine.

Falkowski, P. G., & Raven, J. A. (2007). Aquatic Photosynthesis. Princeton University Press.

Feldman, J. L., Del Negro, C. A., & Gray, P. A. (2013). Understanding the rhythm of breathing: so near, yet so far. Annual Review of Physiology.

Gozal, D. (2008). Sleep-disordered breathing and school performance in children. Pediatrics.

Jerath, R., Edry, J. W., Barnes, V. A., & Jerath, V. (2006). Physiology of long pranayamic breathing: neural respiratory elements may provide a mechanism that explains how slow deep breathing shifts the autonomic nervous system. Medical Hypotheses.

Jerath, R., Beveridge, C., Barnes, V. A., & Jerath, V. (2015). Therapeutic effects of slow breathing in the autonomic nervous system. Medical Hypotheses.

Jefferson, Y. (2010). Mouth breathing: adverse effects on facial growth, health, academics, and behavior. General Dentistry.

Li, P., Yackle, K., et al. (2016). The peptidergic control circuit for sighing. Nature.

Lundberg, J. O., & Weitzberg, E. (1999). Nasal nitric oxide in man. Thorax.

Raichle, M. E., & Gusnard, D. A. (2002). Appraising the brain’s energy budget. PNAS.

Russo, M., Santarelli, D., & O’Rourke, D. (2017). The physiological effects of slow breathing in the healthy human. Breathe.

Satish, U., Mendell, M., Shekhar, K., et al. (2012). Is CO₂ an indoor pollutant? Direct effects of low-to-moderate CO₂ concentrations on human decision-making performance. Environmental Health Perspectives.

Weibel, E. R. (2009). What makes a good lung? Swiss Medical Weekly.

Wolverton, B. C., Johnson, A., & Bounds, K. (1989). Interior landscape plants for indoor air pollution abatement. NASA Report.