Not an expert but my basic understanding is that the hyperventilating before hol... | Hacker News

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		TamDenholm on Feb 19, 2023 \| parent \| context \| favorite \| on: Show HN: Can You Hold Your Breath for 40 Seconds? Not an expert but my basic understanding is that the hyperventilating before holding your breath basically oxygenates your blood so that you can hold for longer.

postsantum on Feb 20, 2023 [–]

No, that's because hyperventilation washes out CO2 so the CO2 alarm going off later than usual

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