How did the mouth breathing experiment impact James Nestor's health?

In an experiment conducted at Stanford, James Nestor and a fellow researcher had their noses plugged for 10 days, forcing mouth breathing. The experience was 'awful,' leading to zero snoring initially but quickly progressing to full-blown snoring, sleep apnea, a very dry mouth, and severe fatigue despite adequate sleep. Data showed significant negative impacts on their bodies and sleep quality.

How does nose breathing protect against viruses and bacteria?

Nose breathing helps filter and heat air, and captures about 40% more moisture than mouth breathing. Crucially, the nose produces nitric oxide, a miraculous molecule that aids vasodilation, circulation, and kills viruses and bacteria. Humming can increase nitric oxide production by 15-fold, further enhancing this protective effect.

What is the link between facial development, industrialized food, and breathing problems?

The speaker explains that facial structure has 'devolved' over the past few hundred years, primarily due to the introduction of industrialized, soft foods. A lack of rigorous chewing, especially in early life, prevents proper skeletal and muscular development of the face, leading to smaller mouths, crooked teeth, and compromised airways, making healthy breathing difficult.

Can ADHD symptoms be linked to sleep-disordered breathing in children?

Some researchers believe that ADHD is 100% related to breathing at night, particularly sleep-disordered breathing. Studies on thousands of children show that those with sleep-disordered breathing are 50 to 90 percent more likely to develop ADHD-like symptoms. When breathing problems are corrected, ADHD symptoms often disappear in a majority of cases.

Is lung capacity related to longevity?

Numerous studies, including the Framingham study, have found a strong correlation between lung size, lung health, and longevity. People with larger, healthier lungs tend to live longer. While lung function naturally declines with age, practices like healthy breathing, specific exercises, and breathwork can help maintain or even improve lung capacity, staving off deterioration.

How can breathing exercises help manage stress and anxiety?

Breathing directly affects the nervous system. Techniques like two sharp inhales followed by a long exhale can reset the respiratory system and calm the body during acute stress. Slower, rhythmic breathing (e.g., 4 seconds in, 6 seconds out) activates the parasympathetic 'rest and digest' response, reducing heart rate and signaling safety to the body.

What are the hidden dangers of high indoor CO2 levels?

High indoor carbon dioxide (CO2) levels, often due to poor ventilation, indicate a high concentration of recycled air and can significantly impair cognitive function and overall health. Studies show a 20% decline in test results at 800 PPM CO2, and a 50% decrease at 1500-2000 PPM. Prolonged exposure can lead to eye irritation, sore throats, bone demineralization, and chronic inflammation.

How does the BOLT (Body Oxygen Level Test) score work and what does it measure?

The BOLT score (or Control Pause) is a diagnostic breath-hold test. After a calm exhale to a neutral point, one holds their breath, timing until the first subtle sign of discomfort or resistance. A score of 40 seconds or more is ideal. It assesses CO2 tolerance, lung oxygen extraction efficiency, and nervous system balance. It's a diagnostic tool, not a competition, and should be averaged over several days.

Can asthma be reversed or significantly improved through breathing practices?

While some people have a genetic predisposition, asthma is not necessarily a lifelong sentence. The speaker believes that many cases of asthma, like Type 2 diabetes, are reversible or significantly reduced by addressing underlying breathing dysfunction. He has witnessed numerous individuals reduce or eliminate their asthma symptoms by taking control of their breathing habits.

What is the benefit of using mouth tape during sleep?

Mouth tape, specifically 'Mayo tape,' provides a gentle reminder to keep the mouth closed during sleep, promoting nasal breathing. This leads to profound benefits, including a flatter heart rate, fewer wake events, and improved sleep efficiency. It helps the brain maintain a consistent, fluid signal and allows the body to properly rest and restore.

What is the physiological effect of vigorous breathwork sessions?

Vigorous breathwork techniques (e.g., pranayama, Kundalini, holotropic) intentionally create a temporary stress response in the body. This process teaches the individual to consciously calm their nervous system and process stress. Biologically, over-breathing can temporarily inhibit blood flow to the brain and reduce CO2, leading to sensations like light-headedness and tingling, which some misinterpret as 'getting high' but are natural physiological responses.

Key Moments

The Breathing Expert: Mouth Breathing Linked To ADHD, Diabetes & Child Sickness!

The Diary Of A CEO

People & Blogs4 min read119 min video

Sep 7, 2023|1,651,886 views|40,608|2,516

The Diary Of A CEO podcast the diary of a CEO podcast life lessons CEO Andrew Huberman Steven Bartlett Steve Bartlett Mathew Walker Daniel Lieberman

Save to Pod

Key Moments

TL;DR

Breathing incorrectly can cause chronic health issues. Proper nasal breathing and conscious breath techniques are vital for health.

Key Insights

Dysfunctional breathing, particularly mouth breathing, is linked to numerous modern health problems including ADHD, diabetes, and autoimmune issues.

The modern environment, characterized by poor posture, pollution, and processed foods, has negatively impacted our facial structure and breathing habits.

Nasal breathing offers significant benefits, including filtering air, improving oxygen uptake, increasing nitric oxide production, and aiding CO2 tolerance.

Conscious control of breathing, especially diaphragmatic breathing and extended exhales, can significantly reduce stress and activate the parasympathetic nervous system.

Lung capacity and health are strong indicators of lifespan, and can be improved through exercises like yoga, cardiovascular activity, and conscious breathing practices.

High CO2 levels in indoor environments can impair cognitive function and overall well-being, highlighting the importance of ventilation.

THE CRISIS OF DYSFUNCTIONAL BREATHING

James Nestor emphasizes that a vast majority of people, around 99%, breathe dysfunctionally without realizing the detrimental effects on their bodies and brains. This poor breathing is linked to an array of modern ailments such as diabetes, asthma, metabolic and autoimmune issues, anxiety, and even ADHD. These conditions are exacerbated by modern lifestyle factors like prolonged sitting, poor sleep habits, and processed foods, all of which conspire to make us sick. Nestor highlights that even with healthy eating and adequate sleep, incorrect breathing will persistently lead to illness.

THE FOUNDATION OF NOSE BREATHING

Nestor passionately advocates for nasal breathing, explaining that our bodies are designed for it. Unlike mouth breathing, nasal passages filter, heat, and humidify air, and crucially, produce nitric oxide. Nitric oxide is a vital molecule that aids vasodilation, circulation, and has antimicrobial properties, potentially helping us ward off viruses and bacteria. He notes that humming can further increase nitric oxide production, offering a simple yet effective health hack. The experiment he conducted, plugging his nose for 10 days, was a harrowing experience that underscored the severe negative impacts of mouth breathing, leading to poor sleep, snoring, and sleep apnea.

MODERN LIFESTYLE'S IMPACT ON FACIAL STRUCTURE AND BREATHING

The decline in healthy breathing is attributed to changes in the modern environment over the past few hundred years. Industrialized, soft foods requiring minimal chewing have led to underdeveloped facial structures, particularly smaller airways. This inherited trait from ancestors who spent hours chewing tougher foods means many people today have narrower passageways, making mouth breathing almost a necessity. This, combined with sedentary lifestyles, poor posture (especially when sitting for extended periods), and constant stress, creates a perfect storm for chronic health issues, including conditions like asthma and ADHD in children.

BREATHING AND THE NERVOUS SYSTEM CONNECTION

Conscious control of breathing is presented as a powerful tool to manage the nervous system. Nestor explains how breathing patterns directly influence our state of being, differentiating between the sympathetic (fight-or-flight) and parasympathetic (rest-and-digest) systems. By practicing slow, deep breaths, particularly with extended exhales, individuals can actively shift into a parasympathetic state, reducing stress, anxiety, and blood pressure. This is crucial because chronic stress, often triggered by everyday occurrences like emails, leads to dysfunctional breathing patterns that can have long-term health consequences.

LUNG CAPACITY, LONGEVITY, AND IMPROVEMENT STRATEGIES

Lung size and health are identified as significant indicators of lifespan, even more so than diet or exercise alone. As lung function naturally declines after age 30, maintaining and improving it becomes critical for longevity and overall health. Nestor suggests that exercises like yoga, cardiovascular activity, and conscious breathing practices can help preserve and even increase lung capacity. He also introduces the concept of a 'bolt score' (Body Oxygen Level Test) as a self-diagnostic tool to assess one's current breathing efficiency and CO2 tolerance, emphasizing that improvement is achievable through consistent practice.

INDOOR AIR QUALITY AND COGNITIVE FUNCTION

A less-discussed but critical aspect of health is indoor air quality. Nestor highlights that high levels of carbon dioxide (CO2) in poorly ventilated indoor spaces, such as offices or schools, can significantly impair cognitive function. Studies show that elevated CO2 levels can lead to reduced test scores and affect concentration. He advocates for better ventilation and the simple act of opening windows to improve air quality, contrasting with the SEALED environments common in modern buildings. This factor, combined with other elements of modern life, contributes to what he terms a 'misalignment problem,' impacting our overall well-being.

Mentioned in This Episode

●Products

●Companies

●Organizations

●Studies Cited

●Concepts

●People Referenced

Common Questions

James Nestor is an international bestselling author who initially experienced persistent respiratory problems like bronchitis and mild pneumonia. After a doctor friend suggested breathwork, he found complete relief and became curious about the science of breathing. His personal transformation and discovery of 'scientifically impossible' feats by freedivers fueled his scientific journalism approach.

Topics

Asthma Facial Development Industrialized Food Lung Capacity

Mentioned in this video

Drugs & Medications

sleeping pills

Medications that can worsen breathing by loosening muscles and increasing resistance during sleep.

albuterol

A bronchodilator given to children with asthma, which may not address the underlying breathing issues.

Media

BBC Maestro series

A series James Nestor is working on, which will offer practical guidance and a toolbox for improving breathing.

Studies & Research

Framingham study

A 70-year study of 5200 people that found a correlation between larger, healthier lungs and longer lifespan.

Companies

Virta

A company mentioned for its success in reversing Type 2 diabetes through dietary changes.

Concepts

bronchitis

A respiratory problem James Nestor experienced regularly before exploring breathwork.

Supplements

Ritalin

Found this useful? Build your knowledge library

Get AI-powered summaries of any YouTube video, podcast, or article in seconds. Save them to your personal pods and access them anytime.

Try Summify free