Breathing through your nose instead of your mouth could be one of the simplest, yet most overlooked, ways to enhance your physical resilience. Health practitioners and endurance athletes alike are turning to mouth taping—the act of sealing the mouth shut during sleep or rest—to encourage nasal breathing, improve recovery, and build a more resilient body.
“Your breath is the foundation of your nervous system,” said performance breathing expert Patrick McKeown, author of The Oxygen Advantage. “When you breathe through your nose, you activate the diaphragm, calm the nervous system, and boost oxygen uptake.”
Mouth breathing, in contrast, has been linked to a variety of health concerns. According to a 2020 study in the Journal of Clinical Medicine, chronic mouth breathing may lead to poor sleep quality, increased anxiety, and reduced athletic performance. It also bypasses the nasal cavity’s filtration system, increasing exposure to allergens and pollutants.
A key benefit of nasal breathing is that it supports nitric oxide production, which plays a critical role in oxygen delivery, circulation, and immune function. As outlined in a review published in the American Journal of Physiology, nasal breathing delivers nitric oxide from the paranasal sinuses directly into the lungs, improving oxygen efficiency and supporting cardiovascular health.
Athletes have long been experimenting with mouth taping as a way to optimize recovery and performance. A 2018 study in Laryngoscope Investigative Otolaryngology found that mouth taping during sleep reduced snoring and improved sleep quality—key factors in hormonal balance, tissue repair, and nervous system regulation, all foundational aspects of physical resilience.
James Nestor, author of the bestselling book Breath: The New Science of a Lost Art, has called mouth breathing “a health hazard” and emphasized that retraining yourself to nasal breathe, even during sleep, can lead to improved endurance, energy, and focus.
“Mouth taping may look silly,” said Dr. Mark Burhenne, a functional dentist and founder of Ask the Dentist, “but for many patients, it’s been life-changing. It supports better sleep, less dryness, fewer cavities, and even reduced nighttime anxiety.”
For those looking to try it, experts recommend using medical-grade, skin-safe tape and starting gradually. Individuals with sleep apnea or nasal obstructions should consult a doctor before experimenting.
In an age of overstimulation and stress, retraining your most basic function—how you breathe—may be one of the most powerful ways to build lasting physical resilience.
