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James Nestor, renowned science journalist and author of the international bestseller "Breath," joins Tim Ferriss for an in-depth exploration of breathing science and its profound impact on health, performance, and sleep quality. The conversation reveals how most people—including elite athletes—breathe dysfunctionally, leading to chronic health issues that can be resolved through simple techniques. (00:38)
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James Nestor is a science journalist and author of the international bestseller "Breath: The New Science of a Lost Art," which has sold over 3 million copies in 44 languages. His work was named best general nonfiction book by the American Society of Journalists and Authors and was a finalist for science book of the year at the Royal Society. He's also the author of "Deep" and "Get High Now Without Drugs." Nestor's journalism has taken him from studying freediving champions to exploring ancient breathing practices, making complex respiratory science accessible to mainstream audiences.
Tim Ferriss is a bestselling author, entrepreneur, and host of The Tim Ferriss Show podcast, which has exceeded 700 million downloads. He's known for deconstructing world-class performers across various fields and optimizing human performance through experimentation and data-driven approaches. Ferriss has authored multiple New York Times bestsellers and is recognized for his systematic approach to learning and improvement.
Nestor reveals that children with sleep-disordered breathing (snoring, mouth breathing, sleep apnea) have an almost complete overlap with ADHD diagnoses. (21:16) The tragic reality is that kids presenting with ADHD symptoms are rarely assessed for breathing or sleep issues—they're simply given drugs. Parents report that converting children to nasal breathing eliminates bedwetting and ADHD symptoms within two weeks. The underlying issue isn't neurological but respiratory: sleep-deprived kids cannot focus or regulate behavior properly.
Nestor's CO2 monitoring reveals that most indoor environments, especially planes and hotels, have dangerously high carbon dioxide levels. (33:07) At 1,500 parts per million (triple outdoor levels), cognitive test scores drop 50%. Hotels with LEED certification paradoxically have the worst air quality because they recirculate air to save on heating and cooling costs. This explains post-flight fatigue and hotel grogginess—your brain is literally being starved of proper air quality.
Before attempting advanced breathwork techniques, Nestor emphasizes mastering basic nasal breathing and diaphragmatic engagement. (99:50) Most people, including elite athletes, are dysfunctional chest breathers who waste enormous energy. Converting to slower, deeper nasal breathing dramatically lowers heart rate, improves oxygen efficiency, and enhances recovery. The foundation must be normal, natural breathing—not exotic techniques that people practice while still mouth breathing the other 23 hours of the day.
Nestor has used mouth tape almost nightly for seven years after learning the technique from a Stanford respiratory therapist. (29:44) The transition was difficult for two weeks but became essential for quality sleep. Even missing one night significantly impacts his sleep scores. Parents can use gentler options like Myotape for children, which simply reminds them to keep lips closed rather than sealing the mouth completely. This single intervention often resolves chronic issues like bedwetting and concentration problems.
Research on Buddhist mantras, Kundalini chants, and Catholic rosary prayers reveals they all require 5-6 second exhalations followed by 5-6 second inhalations. (98:16) This "coherent breathing" pattern maximizes heart rate variability, lowers blood pressure, and increases brain oxygenation. The body enters a state of peak efficiency and coherence. You don't need spiritual practice—simply breathing at this rhythm for a few minutes demonstrates measurable physiological benefits that can be tracked in real-time with HRV monitors.