CO₂ tolerance refers to how comfortably your breathing system responds to normal carbon dioxide levels during rest and activity. It can vary widely between individuals and may be influenced by breathing habits, stress levels, and practice. Higher CO₂ tolerance is generally associated with calmer, more efficient breathing patterns, while lower tolerance may contribute to overbreathing or breathing discomfort. Many people use breathing exercises and CO₂-focused practices to support their body's comfort with normal CO₂ levels.
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