CO₂ tolerance
CO₂ tolerance: why you feel out of breath
The urge to breathe comes from rising carbon dioxide, not falling oxygen. Train how you respond to it and you feel calmer, on the mat and off it.
What CO₂ tolerance is
Every breath you take is driven mostly by CO₂. When it rises, your brain pushes you to breathe. CO₂ tolerance is how calmly you handle that push. With low tolerance, a small rise feels like panic. With high tolerance, the same rise feels like nothing much.
Signs yours is low
- You sigh or yawn a lot during the day.
- You get breathless quickly when you're stressed or active.
- Your breath-hold ends early, with plenty of oxygen left.
How to train it
- Breathe less. Gentle, reduced breathing raises CO₂ slightly. Stay calm with it.
- Exhale holds. Short holds after a normal exhale reach the urge to breathe quickly and safely.
- CO₂ tables. A fixed hold with shorter rest each round, so CO₂ builds step by step.
- Apnea walking. Holding your breath while you walk. Coming soon as a free tool.
Safety.Train seated, lying down or walking on safe flat ground. Never hold your breath in or near water.
Draft · Gert to review copy
FREEFree toolThe CO₂ table cheat sheet
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Start with the 6-Week Breathwork Challenge. 15 min a day, from home. No water needed.
2:100:50 → 2:10 · 26d
3:321:30 → 3:32 · 45d
5:042:45 → 5:04 · 62d