CO₂ breathing training involves controlled exposure to slightly elevated carbon dioxide levels during breathing exercises. Many people who practice CO₂ breathing report feeling calmer, noticing improved breathing comfort, and experiencing better stress resilience. Some users describe enhanced focus and a greater sense of control over their breathing patterns. The Cardihaler supports structured CO₂ breathing practice with adjustable levels from 0.5% to 8%. Individual experiences vary, and CO₂ breathing training is a wellness practice, not a medical treatment.
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