Eli5 How people train to hold breath underwayer for 2+ minutes?

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Tbh is that long even possible?

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Anonymous 0 Comments

The current freediving record is 24 minutes and 37.36 seconds and was achieved by a 56 year old man on 27 March 2021

[https://www.guinnessworldrecords.com/news/2021/5/freediver-holds-breath-for-almost-25-minutes-breaking-record-660285](https://www.guinnessworldrecords.com/news/2021/5/freediver-holds-breath-for-almost-25-minutes-breaking-record-660285)

Humans have a reflex when they go under water that suppresses the urge to breath which is based on the build up of CO2 in the blood. We have a reflex that takes affect when we are submerged under water while holding our breath and it’s called the diving reflex or mammalian diving reflex where our heart and metabolism slows down and we produce less CO2 allowing you to hold your breath for longer. If you’re actually free diving going deeper also helps to suppress the urge to breath by compressing the CO2 in your blood.

This has been utilized in antient cultures to free dive hundreds of feet to hunt for conch.

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