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I used to do that in the swimming pool (I have always lived far inland) it’s often called dangerous on the mistaken belief that it’s like shallow water drowning where someone hyperventilates to swim underwater longer; since those people have blown off so much CO2 they don’t get a signal to breathe and suffocate.

Our method doesn’t involve hyperventilation, and wow does the need to breathe get strong

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Itdidnttrickledown@lemmy.world ⁨1⁩ ⁨week⁩ ago
I was in my younger years blessed with the ability to hold my breath for nearly five minutes. I used to stay down so long people would get worried. I never did anything other than take a full breath. Hyperventilating always shortened my dive times.

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saltesc@lemmy.world ⁨1⁩ ⁨week⁩ ago
Haha, I just responded to another comment of having to pull myself up from shallow drowning. It’s for real, but I think it’s specific to people with good long capacities—doing a lot longer than the average. I can easily hold my breath for 60s, but 90% of people can’t. Shallow drowning is not a situation 90% of people could find themselves facing.

I always remember brain damage can start occuring after 180s, so start questioning at 120. Nothing wrong with coming up for a couple mins of good fresh air before going down again.

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