Two divers can take an identical breath and one will hold far longer. The difference is rarely lung size; it is efficiency, how slowly each diver spends the oxygen they have. Efficiency is trainable, and for most people it offers far bigger gains than chasing a larger inhale.
Techniques
Improving O2 Efficiency: Doing More With Less Oxygen
Longer holds are not only about a bigger lung breath. They come from spending the oxygen you have more wisely through relaxation, conditioning, and smart technique.
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10 min read· IntermediatePRO
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