Breathwork Basics

The Benefits of Breathing

Breathing is essential. Ground-breaking stuff, right?

Whether we are conscious of it or not, we breathe somewhere between 17,000 and 29,000 times per day. The way we breathe directly affects our physical and mental health, athletic performance, emotional intelligence, stress management, and even longevity. This seemingly autonomous process plays a central role in regulating damn near every system in our body.

At a glance, breathing influences:

• Acid-base (pH) physiology
• Electrolyte balance
• Hemoglobin chemistry
• Blood flow
• Kidney function
• Muscle function
• Cardiac electrophysiology

Now, you may be thinking, “I know breathing is important, but that’s why our lungs do it automatically, right?” While that’s true (we wouldn’t last long if they didn’t), when we shift our focus to breathing quality and efficiency rather than just the act of breathing itself, we discover that the breath is our first gateway into controlling our physiology.

Movement, nutrition, sleep, and hormonal regulation all act on timescales of hours to weeks. Breath acts in seconds. It’s the only voluntary input you have into your autonomic nervous system that responds in real time. That’s the whole reason breathwork works at all.

How Breathwork Can Improve Wellbeing:

The breathwork research base is chaotically wonky. Some claims have multiple RCTs behind them; others trace to small studies that haven’t been robustly replicated. Here’s a rough tier of what the evidence supports:

Well-supported by replicated research

• Reduces clinical and non-clinical anxiety symptoms
• Lowers cortisol and reduces markers of chronic stress
• Improves heart rate variability and autonomic flexibility
• Reduces symptom burden and rescue-medication use in asthma (specifically Buteyko-tradition methods)

Suggestive evidence, smaller studies or specific populations

• Alleviates depression symptoms, particularly in protocols like Sudarshan Kriya yoga, with normalisation of brainwave patterns and changes in serum prolactin reported
• Provides relief from PTSD symptoms in military and refugee populations
• Increases nitric oxide production via nasal breathing, with implications for blood vessel function
• Enhances measures of immune function, including natural killer cell activity in some cancer remission cohorts
• Improves cognitive measures, including attention and emotional regulation, with measurable EEG changes

Plausibly, but the research is early days

• Influences gene expression in immune cells
• Lowers total cholesterol, LDL, and triglyceride levels
• Regulates sex steroid hormone levels

Breathwork has solid evidence supporting its use for state regulation, anxiety, and asthma symptom management. The broader claims, especially the gene expression and lipid profile work, come from smaller studies that need replication before they can be treated as settled. Doesn’t mean they’re wrong; it just means we should hold them lightly until the evidence catches up.

Do You Breathe Correctly & What Happens If You Don’t?

Unconscious ineffective breathing patterns are surprisingly common and rarely diagnosed. The clinical term is “dysfunctional breathing,” and it shows up in roughly 1 in 10 adults seen in primary care, rising to about 1 in 3 among people diagnosed with asthma. In asthma populations specifically, breathing pattern disorders frequently get misread as poorly controlled asthma, leading to escalating steroid and beta-agonist prescriptions that don’t address the underlying biomechanical issue. I, like many others, “grew out” of my asthma after ignoring my mother’s plea to use my inhaler every time the wind blew, and went outside to exercise instead (obviously not every case is like mine, so keep those lacy panties untwisted). This is an example of where the lack of pharmaceutical incentive to fund non-drug research has clinical consequences. 

The downstream effects of dysfunctional breathing aren’t always obvious. Fatigue, poor posture, disrupted sleep, mood instability, brain fog, increased risk of asthma and apnea, and chronic pain all have established links to inefficient breathing patterns.

Sleep apnea (low oxygen and obstructed airways during sleep) is associated with reduced sex hormone levels. The relationship is more nuanced than the popular “cortisol steals from sex hormones” framing. The actual mechanism involves sleep fragmentation, chronic intermittent hypoxia, HPA axis dysregulation, and obesity confounding. Not a simple battle for cholesterol. Either way, better breathing during the day reduces apnea risk at night, improves deep sleep quality, and supports hormonal balance through several converging pathways.

Who Could Benefit from Breathwork Training?

• Do you feel unrested even after a full night’s sleep?
• Do you wake up with a dry mouth?
• Do you frequently feel stressed or on edge?
• Do you suffer from depression, anxiety, PTSD, or autoimmune disorders?
• Do you struggle to lose weight, no matter how much you exercise or diet?
• Do you or your family have a history of high blood pressure or diabetes?
• Do you experience brain fog or poor mental clarity?
• Are you struggling to improve your physical performance?

Most of these are non-specific. None of them on their own diagnose dysfunctional breathing, but if you experience a cluster of these, you may stand to benefit from breathwork.

It’s also free, which makes it one of the highest-leverage interventions available. So, keep reading bio-optimizer aficionados.

If Breathing is Essential for Longevity, Why Isn’t Proper Breathing Automated?

Here’s another groundbreaking revelation: modern life has shifted our default breathing patterns away from what evolution optimized for.

There’s a chain of contributing factors:

• Diets shifted toward softer, processed foods over generations, which contributed to changes in craniofacial development (narrower palates, recessed jaws, smaller airways).
• Movement patterns declined, reducing diaphragmatic engagement.
• Chronic activation of the sympathetic nervous system from over-stimulation, low-grade chronic stress, and fast-paced lifestyle defaults has reinforced shallow chest breathing as the autonomic baseline.

When the sympathetic nervous system runs the show, the body prioritizes short, sharp breaths to shuttle oxygen to muscles. This makes sense in a fight-or-flight emergency. It doesn’t make sense as a 24/7 default. Sustained over years, this pattern decreases CO₂ tolerance, disrupts hormonal balance, and weakens diaphragmatic function. None of which we evolved to handle as a chronic state.

Am I Doomed to Yoga?

No. Yoga has real benefits (even the bastardized Western version), but breathwork doesn’t require contorting yourself in a room full of strangers.

By practicing the techniques in this manual, you can counteract a lot of what modern life has reinforced and most breathwork techniques can be done anywhere and anytime. Whether you need to calm down, energize yourself, or improve endurance, the breath is your most accessible tool.

What Happens When We Breathe?

Since this is just an introductory guide, we’ll keep things simple. If you’re interested in digging deeper into the biochemistry, click on the Breathing Rabbit Hole link.  

Why Do We Need to Breathe?

At its core, breathing fuels energy production. The body uses oxygen to break down fuel; carbon dioxide (CO₂) is produced as a byproduct. However, CO₂ also plays a central role in regulating blood pH and oxygen delivery, which we’ll come back to.

How Do We Breathe?

The respiratory system consists of the lungs, diaphragm, trachea, chest muscles, blood vessels, and brainstem. It functions automatically but can be influenced consciously.

When you inhale:

1. The diaphragm contracts, expanding the chest cavity.
2. Air pressure drops, pulling air into the lungs.
3. Oxygen moves into the alveoli, diffusing into the bloodstream.
4. Oxygen binds to hemoglobin and is transported throughout the body.

When we exhale:

1. The diaphragm relaxes, compressing the lungs.
2. Carbon dioxide moves from the bloodstream into the lungs.
3. CO₂ is exhaled, regulating blood pH and nervous system function.

The breathing skeletal muscles (mainly external intercostals and the diaphragm) don’t fire on their own. They contract because the brainstem tells them to (specifically, a small cluster of neurons called the preBötzinger complex). This is where the inspiratory rhythm is generated, and it’s also where breathing connects directly to your emotional state.

A subset of around 175 neurons within the preBötzinger complex projects directly to the locus coeruleus: the brain’s main source of norepinephrine and a key regulator of arousal and panic. When researchers selectively disabled these neurons in mice, the mice continued breathing normally but became markedly calmer. Rapid, erratic breathing increases input to the arousal system; slow, controlled breathing reduces it. This is the anatomical bridge between how you breathe and how you feel. It’s why slow breathing actually works to calm you down.

Aerobic Respiration: Fueling Energy Through Breath

Aerobic respiration is how the body turns oxygen and fuel into ATP: the energy currency of cellular function. Beyond glucose, aerobic metabolism can also use fat for fuel, making it the primary system for endurance and long-duration energy.

Aerobic respiration is slower than anaerobic respiration but far more efficient. One molecule of glucose yields roughly 30 ATP through aerobic metabolism, compared to just 2 through anaerobic glycolysis. Anaerobic metabolism is suited to short bursts (sprinting, powerlifting); aerobic metabolism sustains everything longer than that.

As a side note, the common piece of folk wisdom: “lactic acid causes muscle fatigue,” has been substantially revised by exercise physiology over the last few decades. Lactate is actually a fuel and a signaling molecule, not a waste product, and the link between acidosis and fatigue is more complicated than the “lactic acid burn” framing suggests. 

The key takeaway:

Deep, efficient breathing + Hydration = Better-supported energy production

Autonomic Nervous System Control: How Breath Shapes Your State

The autonomic nervous system (ANS) governs involuntary bodily functions, including breathing. It consists of two primary branches:

1. Parasympathetic Nervous System (PNS): Slows breathing, narrows bronchial tubes, and promotes relaxation and digestion.
2. Sympathetic Nervous System (SNS): Speeds breathing rate, widens bronchial tubes, and prepares the body for action.

At first glance, these systems seem entirely out of our control, but that’s where breathwork changes the game. Through intentional breathing, we can activate or suppress these systems at will:

• Slow, controlled breaths → PNS activation → Calm state
• Rapid, intense breathing → SNS activation → Heightened alertness

When breathing slows to roughly 6 breaths per minute, it aligns with the cardiovascular system’s natural resonance frequency. This is the same rhythm as the 10-second oscillations in blood pressure known as Mayer waves. Breathing at this rate produces high-amplitude oscillations in heart rate variability and increases baroreflex sensitivity, which is essentially “exercise” for the autonomic nervous system.

Research on rosary recitation in Latin and the Om mantra found that both, performed traditionally, naturally slow breathing to almost exactly 6 breaths per minute. Different cultures, different traditions, same physiological endpoint. Contemplative practices stumbled onto resonance frequency long before anyone could measure it.

Breathing and Physical Performance

Your body adjusts breathing in response to oxygen demands, whether at rest or during movement. Sensors in your joints and muscles communicate with your brain to increase your breath rate as physical activity intensifies. If your breathing is inefficient, even high fitness levels won’t compensate.

The fix? Strategic breath control:

• Slow, full exhalation + Diaphragm engagement → Reduced heart rate, enhanced endurance
• Deep inhalation through the nose → Increased oxygen delivery, more sustainable output

Master your breath, and you optimise your performance.

Nasal Breathing: The Forgotten Default

The pharynx (muscles in the throat) plays a major role in airway patency. Weakness or chronic poor posture in this area can lead to airway narrowing, sleep apnea, reduced nitric oxide production, nasal congestion, postural issues, and in children even ADHD-like symptoms. Mouth breathing tends to worsen these issues, especially during sleep or high exertion.

Why Nasal Breathing Matters

• It creates higher airway pressure, keeping the upper airway muscles engaged
• It increases nitric oxide production from the sinuses, which improves oxygen delivery and vascular function
• It filters and humidifies inhaled air, reducing inflammatory triggers
• It modulates cortical brain rhythms. Research using EEG and intracranial recordings shows that nasal breathing entrains oscillations in the prefrontal cortex, hippocampus, and amygdala in ways that mouth breathing doesn’t

The cortical finding is especially interesting: when researchers bypassed the nasal cavity (in tracheotomy patients), the respiratory-linked brain rhythms vanished, and reappeared when rhythmic air-puffs were delivered to the nasal vault. Nasal breathing has a direct input to brain function that mouth breathing doesn’t provide.

What Causes Mouth Breathing?

• Chronic inflammation (often diet-driven; processed foods, food sensitivities, etc.).
• Soft diets (generations of softer food have changed jaw and airway development).
• Tonsillectomy without addressing underlying nasal cavity issues.
• Postural collapse and sustained mouth-open positioning during screen use

Low inflammation + Harder foods + Nasal breathing = Greater oxygen efficiency and structural resilience

Diaphragmatic Breathing: The Foundation of Efficient Respiration

The diaphragm is a dome-shaped muscle below the lungs, separating the chest from the abdominal cavity. It’s the primary driver of respiration. When it contracts and flattens, it pulls air in; when it relaxes, air goes out.

Most people underuse the diaphragm and breathe predominantly with the upper chest. This pattern weakens diaphragmatic function and reinforces the sympathetic-dominant breathing default.

How to Train Your Diaphragm

1. Sit comfortably, placing one hand on your chest and the other on your belly.
2. Breathe deeply into your belly, ensuring the lower hand moves while the upper hand stays still.
3. Exhale fully, allowing the diaphragm to relax naturally.
4. Repeat for 5-10 deep breaths, noticing the increased lung capacity and relaxation.

If you struggle with this, try lying flat with a small object on your stomach for tactile feedback. Once diaphragmatic control is restored, progress to 360-degree expansion breathing, ensuring rib cage movement in all directions.

Diaphragmatic activation + Breathwork = Greater breathing efficiency and a calmer baseline state

The Hidden Danger of Overbreathing

Here’s the counterintuitive part: in the modern context, breathing too much is a much more common problem than breathing too little. When we’re anxious, stressed, or overstimulated, we instinctively shift to shallow, rapid chest breathing, trying to pull in more oxygen to compensate. But this habitual overbreathing lowers CO₂ tolerance, disrupts blood chemistry, and makes us feel worse.

Why CO₂ Matters

Most people think of CO₂ as waste. In reality, it’s a key player in oxygen delivery.

The Bohr effect describes how hemoglobin (the protein that carries oxygen) only releases oxygen efficiently in the presence of CO₂. When CO₂ is high in the tissues, hemoglobin shifts into a “tense” state and lets go of oxygen where it’s needed. When you breathe too much and blow off too much CO₂, hemoglobin stays “relaxed” and holds onto oxygen. Meaning oxygen stays bound to the blood and doesn’t reach the cells that need it.

In other words: more breathing doesn’t mean more oxygen delivery.

Effects of Chronic Overbreathing (Hypocapnia)

• Impaired oxygen delivery to the brain and muscles
• Blood vessel constriction, cold extremities
• Disrupted acid-base balance ( blood becomes too alkaline, causing dizziness and brain fog)
• Increased emotional reactivity (anxiety, panic, irritability)
• Cognitive impairment (poor memory, attention deficits)
• Sustained sympathetic activation
• Compromised immune function

Left unchecked, overbreathing creates a feedback loop: low CO₂ tolerance forces faster breathing, which lowers CO₂ tolerance further. Over time, you end up trapped in a chronic stress pattern that’s actively self-reinforcing.

Signs You May Be Overbreathing

• Frequent sighing or yawning
• Waking up with a dry mouth
• Tingling, numbness, or unexplained dizziness
• Anxiety with no clear external cause
• Brain fog or persistent mental fatigue
• Mouth breathing as a default

If most of these resonate, your breathing pattern may be holding you in a stress state.

Relearning How to Breathe: The Fix for Overbreathing

Instead of forcing deep breaths, the work is to slow down and rebuild CO₂ tolerance.

1. Observe Your Breathing

• Take a step back and simply notice your breath.
• Is it shallow? Deep? Fast? Slow? Are you using your nose or mouth?
• Try not to control it. Just observe.

2. Prioritize the Exhale

• Shift your focus away from inhaling more air.
• Let your exhale be long, slow, and passive – no forcing, no pushing.
• The goal is to allow CO₂ levels to normalize rather than dumping them out too quickly.

3. Build CO₂ Tolerance Gradually

• After each exhale, pause before inhaling again.
• Start with a short pause (1-2 seconds) and gradually increase over time.
• If this pause makes you feel uncomfortable, that’s a sign of low CO₂ tolerance – keep practicing.

4. Breathe Quietly and Lightly

• Reduce the size of your breaths. Breathe just enough to feel comfortable.
• Avoid large, exaggerated breaths unless they are specifically used for performance or training.

By following these steps, you train your body to work more efficiently, improving oxygen delivery, lowering stress levels, and restoring balance to your nervous system.

Understanding the Inhalation Reflex

Between every exhale and inhale, there should be a natural pause. If you find yourself rushing to inhale or feeling panicked during these pauses, that’s a sign of low CO₂ tolerance. Your body has become reliant on excess breathing.

Reconditioning the Reflex:

• Start with 2-second pauses after exhaling before inhaling again.
• Gradually extend this pause to 5-10 seconds over time.
• During these pauses, focus on relaxation rather than anticipating the next breath.

Learning to trust the body’s natural breathing rhythm rather than over-controlling it can significantly reduce anxiety and stress-related symptoms.

The Science Behind Breath Chemistry

Your breath directly regulates blood pH, oxygen delivery, and nervous system state. Understanding this balance allows you to optimize breathing for peak health and performance.

The Respiratory Equation:

• pH (blood plasma) = [HCO₃] (bicarbonate, regulated by kidneys) / PCO₂ (regulated by breathing)

• Acid-base balance = Bicarbonates / CO₂

• Nervous system state = Breathing mechanics / Blood pH

• Performance = Respiratory efficiency / Oxygen utilization

Breathwork isn’t just relaxation. It’s a tool to retrain your body at the chemical level, improving energy, cognition, and resilience by giving your physiology back its regulatory range.

Final Thoughts: The Breathwork Mindset

Before diving into structured breathing exercises with the typical Type-A approach, remember: breathwork is about removing the patterns that keep your nervous system stuck in a state inappropriate to your actual circumstances, and giving the system back the regulatory tools it evolved to use.

Once effective breathing patterns are restored, the body self-regulates and most techniques become less necessary. Over time, breath control becomes an autonomic skill and your nervous system learns to adapt instinctively by default.

The breath is a foundation for health, performance, and longevity, but only when used correctly.

Retrain the breath. Reclaim control. Optimize your physiology.