A deep breath under stress often backfires. Learn how CO₂ tolerance shapes calm, how to test it with the BOLT score, and a daily practice to build it.
Author: jennanewbery
Air Hunger: How CO₂ Sensing Drives Your Stress Response
That tight-chested, can’t-catch-my-breath feeling often comes from CO₂ sensing, not low oxygen. Learn how chemoreceptors work and how to recalibrate them.
The Oxygen Paradox: Normal Blood Oxygen, Foggy Brain
A normal SpO₂ reading doesn’t tell you how much oxygen reaches your brain. Learn how CO₂, the Bohr effect, and breathing habits shape focus and calm.
The Bohr Effect: Why Breathing Less Can Sharpen Your Brain
Big breaths can reduce oxygen delivery to your brain. Learn how the Bohr effect works, how to test your CO₂ tolerance with the BOLT score, and how to fix it.
The Lopsided Life: Why Trying Harder Stops Working
Teachers, nurses, tradespeople, shift workers — the people carrying the heaviest loads rarely have a discipline problem. They have a lopsided life: work and money have taken up so much room that everything else holding them together has thinned out. This piece explains why you can’t think your way out of a state your body is holding you in, the five dimensions that keep a nervous system steady, and a simple breath reset that works in the car, the corridor, or the ute between jobs.