Breathing for Women, Children, and Sleep: Reflections From San Francisco

Why It Matters

Optimizing breathing patterns can prevent respiratory dysfunction, enhance sleep quality, and influence developmental health, offering a low‑cost, high‑impact tool for clinicians and the public alike.

Key Takeaways

• Nasal breathing improves CO2 tolerance and diaphragm recruitment.
• Mouth breathing in children hinders facial development and alters microbiome.
• Female hormonal cycles lower CO2, increase fatigue; track BOLT score.
• Upper airway resistance disrupts women's sleep, causing low arousal threshold.
• Light, slow breathing exercises reduce stress and enhance sleep quality.

Summary

The video features a conversation with renowned physiotherapist Kelly Starrett and his wife Juliet, focusing on how breathing patterns affect women, children, and sleep quality. They explore the physiological links between nasal versus mouth breathing, diaphragm use, and overall health outcomes.

Key insights include exercise‑induced bronchoconstriction caused by hyperventilation, the role of nasal breathing in raising CO2 tolerance, and how chronic mouth breathing in children impairs craniofacial growth and disrupts oral and gut microbiomes. For women, hormonal fluctuations—particularly progesterone spikes—lower CO2 levels, heightening fatigue and anxiety; the hosts recommend tracking the BOLT (Body Oxygen Level Test) score across menstrual phases. Upper airway resistance syndrome, more prevalent in females, fragments deep sleep and lowers arousal thresholds.

Illustrative examples range from children’s crowded teeth due to low tongue posture to the presenter’s personal practice of mouth‑taping (via Myotape) to encourage nasal breathing. A vivid anecdote describes returning to San Francisco, noting the clear view of the Golden Gate Bridge as a reminder to breathe mindfully and stay present.

The discussion underscores that everyday breathing habits directly influence respiratory efficiency, sleep architecture, and even facial development. By adopting nasal, diaphragmatic breathing, monitoring BOLT scores, and performing light, slow breath exercises, individuals can mitigate stress responses, improve sleep continuity, and support long‑term health.

Original Description

In this short, on-the-go episode, Patrick McKeown shares key insights on breathing as he reflects on a recent visit to physiotherapist Kelly Starrett in San Francisco.

Patrick explores how breathing affects athletes, children, and women, with a special focus on sleep and the stress response. He explains why exercise-induced bronchoconstriction is often driven by over-breathing, why nose breathing in childhood is essential for healthy facial and dental development, and how female breathing patterns shift across the menstrual cycle.

You’ll learn what the BOLT score (Body Oxygen Level Test) reveals about your breathing, why building CO₂ tolerance matters, and how simple practices—like nose breathing during light to moderate exercise and breathing light, slow, and deep (LSD)—can transform your health, sleep, and resilience to stress.

Recorded against the backdrop of the Golden Gate Bridge, this mini episode invites you to step out of your head, into your body, and back into the present moment—one gentle breath at a time.

Show Notes – Bullet Points

Patrick’s visit to Kelly Starrett in San Francisco and their shared focus on breathing and movement

Exercise-induced bronchoconstriction:

How over-breathing and hyperventilation during exercise narrow the airways

Why “breathing harder” can make symptoms worse

Children’s breathing, growth, and dental health:

Importance of nasal breathing for craniofacial development

How mouth breathing, low tongue posture, and dry mouth affect jaw growth and crowded teeth

Links between oral breathing, the mouth–gut microbiome, and overall health

Women’s breathing and the menstrual cycle:

How progesterone post-ovulation and in the mid‑luteal phase stimulates breathing

Potential drop in CO₂ levels (up to ~25%) and links to pain, fatigue, anxiety, and panic

Using the BOLT score to track breathing across the cycle

Building CO₂ tolerance:

Nose breathing during light to moderate exercise

“Breathing less air” exercises: gentle air hunger for 3–5 minutes

Reducing sensitivity to CO₂ and improving biochemical breathing

Diaphragmatic vs upper chest breathing:

How mouth breathing reduces diaphragm recruitment

Role of nasal breathing, tongue on the roof of the mouth, and a BOLT score above 20–25 seconds

Sleep, upper airway resistance, and waking at night:

Overview of Upper Airway Resistance Syndrome (UARS) and low arousal threshold

How fast, upper‑chest, mouth breathing signals stress to the brain and disrupts sleep

Optimal (LSD) breathing vs stress breathing:

Stress pattern: fast, hard, upper chest, mouth breathing, quick exhale, irregular rhythm

Optimal pattern: Light, Slow, Deep through the nose with soft inhale and relaxed, gentle exhale

Patrick’s personal journey:

Decongesting the nose, using breathing exercises for wheezing and sleep

Mouth taping since the late 1990s and later development of MyoTape

Safety note: why people with obstructive sleep apnea should not tape across the mouth

Closing reflections at the Golden Gate Bridge:

Using the breath to come into present-moment awareness

Experiencing beauty and awe through the body, not just analytical thought

Call to action:

Start by breathing through your nose, at rest and during gentle exercise

Practice breathing light, slow, and deep to support sleep, calm, and overall health