CO₂ Tolerance Training: Simple Breath Holds to Improve Calm, Focus & Endurance

Dr. Schilling teaches a simple CO₂ tolerance breath-hold practice designed to calm the nervous system and build stress resilience. Learn how holding your breath on a full exhale trains your body to operate more efficiently under stress — improving focus, reducing agitation, and boosting exercise endurance. Recommended 3–5 times per week.