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Breath can be a switch you flip on your biology, a power you can align with the body’s natural rhythms. In a line of Italian studies, prayers that exhale for five to six seconds and then slowly inhale produced a state of coherence across multiple systems, a pattern called coherent breathing. James Nestor traces this thread to predecessors of Wim Hof and to the Bon Buddhist tumo, a technique said to generate heat through controlled breath and metabolic modulation. He explains two versions: the traditional tumo, a slow, heat-generating process, and the commercialized “tumo light” with short breaths and muscular compression during breath holds that can trigger sweat even in cold. Nestor has practiced the latter, noting it can warm you instantly, while the slower form remains more guarded and esoteric. The conversation then dives into personal practice: Sudarshan Kriya opened Nestor’s eyes to the power of breath work, after years of respiratory infections and nights spent hearing himself breathe. He numerically cites the link between sleep-disordered breathing in kids and ADHD, arguing that many cases are breathing problems misdiagnosed as neurological, and urging parents to assess nasal breathing, mouth breathing, and snoring rather than defaulting to pills. Techniques center on becoming an obligate nasal breather and gradually extending the nasal approach into sleep, using aids like mouth tapes and Myotape to train lips shut at night. He relays his own dramatic breakthrough with sleep tape, and notes that many athletes and doctors are studying these patterns with growing interest. A central thread follows Nestor’s obsession with indoor air quality. He showcases a carbon dioxide monitor and outlines decades of studies showing cognitive performance dipping as indoor CO2 rises, with marked effects around 1,500 to 5,000 parts per million. He travels with monitors, records hotel air, and finds many green-certified buildings fail to deliver fresh air, often recirculating backwash. His practical advice: ensure windows open where possible, request rooms with ventilation, and, when unavoidable, use a monitor database to guide choices. He also shares metrics like the bolt score for CO2 tolerance, a quick nasal-breathing test that climbs with regular training, and praises diaphragmatic breathing and resistance devices for athletes. The conversation closes on writing, discipline, and the craft of turning years of notes into a cohesive narrative.

The interview focuses on sleep apnea, a significant oral health issue affecting 22 million Americans, many of whom remain undiagnosed. Dr. Mark Burhenne emphasizes that dentists can identify sleep apnea symptoms much earlier than physicians by examining various signs in the mouth and facial structure. He highlights the importance of recognizing sleep apnea in children and its potential long-term effects on brain development and overall health. Dr. Burhenne discusses the traditional view of sleep apnea, often associated with overweight older males, and introduces the broader spectrum of the condition, which can manifest in milder forms that are frequently overlooked. He explains that sleep apnea can begin at birth and is characterized by interruptions in breathing during sleep, leading to various health issues, including brain damage and increased risks of conditions like Alzheimer's. The conversation touches on the anatomical changes in jaw structure over generations, influenced by factors such as diet and breastfeeding, which contribute to the rising prevalence of sleep apnea. Dr. Burhenne notes that mouth breathing, often resulting from nasal obstructions, exacerbates sleep issues and can lead to dental problems like gum disease. He advocates for early screening for sleep disorders, suggesting that everyone should undergo a sleep study by age five or ten. The discussion also covers the importance of proper breathing techniques, including the benefits of nasal breathing over mouth breathing, and introduces the concept of mouth taping as a tool to encourage nasal breathing during sleep. Dr. Burhenne outlines a three-step plan for addressing sleep apnea: recognizing the potential for sleep disorders, exploring treatment options (including CPAP, oral appliances, and surgery), and verifying sleep quality through follow-up assessments. He emphasizes the need for patients to be proactive in their health care, advocating for collaboration among dental and medical professionals to improve outcomes for those suffering from sleep apnea. Overall, the interview highlights the critical connection between sleep health, oral health, and overall well-being, urging listeners to prioritize sleep as a fundamental aspect of their health.

James Nestor discusses how the human habit of dysfunctional breathing underpins a wide range of health issues, emphasizing that breathing is a continuous, energy-driving process rather than just a response to food and drink. He argues that most people breathe suboptimally due to anatomical and lifestyle changes that have emerged with industrialization, particularly noting smaller mouths and narrower airways that push people toward mouth breathing. The conversation explores how soft, processed foods and reduced chewing in early childhood contribute to facial and dental development that limits airway space, linking these structural changes to snoring, sleep apnea, and impaired nasal breathing. The discussion then shifts to the physiology of breathing, explaining that mouth breathing tends to shallowly pull air into the chest, reduces CO2 tolerance, and disrupts the balance of oxygen delivery to tissues. Nestor explains CO2’s essential role in releasing oxygen from hemoglobin and maintaining blood pH, warning that chronic over-breathing can place the body under sustained low-grade stress and blur the line between rest and stress. The host and guest examine the nose as the preferred conduit for air, noting benefits such as nitric oxide production, improved filtration, and better sleep quality when nasal breathing is habitual. They cover practical strategies to retrain breathing, including daytime nasal breathing, diaphragmatic technique, and gradual use of sleep tape, while acknowledging that structural obstructions may require medical or dental interventions such as deviated septum corrections or orthodontic considerations. Throughout, the pair reflect on the variability of individual circumstances, offering a spectrum of approaches rather than universal prescriptions. The episode also delves into broader implications for chronic disease, sleep, and mental health, highlighting the potential of breathing retraining to improve conditions like asthma, hypertension, and anxiety by stabilizing the autonomic nervous system and reducing nocturnal arousal. Personal stories from the guests, expert references, and a focus on accessible, low-cost practices underscore the theme that empowering everyday breathwork can meaningfully extend healthspan, provided foundational, consistent habits are established.

James Nestor discusses the significance of nasal breathing and its health benefits, sharing insights from his experiment at Stanford. He highlights the dangers of chronic mouth breathing, which affects air purification and can lead to various health issues, including hypertension and sleep apnea. Nestor emphasizes that nasal breathing not only conditions the air but also enhances oxygen uptake and releases nitric oxide, a molecule that helps combat viruses and supports overall health. The conversation touches on the importance of breathing techniques, such as humming, which can increase nitric oxide production significantly. Nestor shares his personal experiences during a 21-day study where he alternated between mouth and nasal breathing, revealing drastic changes in his health metrics, including increased blood pressure and sleep disturbances during mouth breathing. He explains that many people have become chronic mouth breathers due to environmental factors, anatomical changes, and lifestyle habits. Nestor discusses the potential need for surgical interventions for those with severe structural issues but advocates for exploring natural breathing techniques first. He mentions the use of mouth taping at night to encourage nasal breathing and the benefits of nasal strips to enhance airflow. The discussion also delves into the broader implications of breathing on mental and physical health, including its role in stress management and overall well-being. Nestor argues that breathing is often overlooked in medical assessments, despite its foundational role in health. Nestor shares surprising insights from his research, including the idea that evolution does not necessarily lead to improved health outcomes and that breathing can be used to regulate body temperature, as demonstrated by certain breathing techniques used by monks. He references Wim Hof's breathing method, which has shown potential in reducing symptoms of infections. The conversation concludes with Nestor emphasizing the importance of integrating healthy breathing practices into daily life, encouraging listeners to prioritize nasal breathing and explore various techniques to improve their health. He advocates for a holistic approach to well-being that includes mindfulness about breathing, diet, and lifestyle choices.