Andrew Huberman· PhD
But never do breath holds and hyperventilation near or in water.
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We can't find evidence that holds up here. Proponents are reasoning from mechanism or analogy rather than direct human data, and the most credible skeptics raise objections we can't dismiss.
But never do breath holds and hyperventilation near or in water.
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Now, I want to emphasize never ever, ever do this anywhere near water. People have passed out. So-called shallow water blackout. People have died. Don't do it in the bathtub. Don't do it the hot tub. Don't do it before swimming. Please don't do it anywhere near water. Please don't do it at all, unless you get clearance to do it from your doctor because there are some pulmonary effects and whatnot. And the breath holds should definitely not be done by anyone that has glaucoma pressure concerns for the eyes.
Always, always, always do this on dry land. Never while driving, operating heavy machinery, all the standard safety protocols. Never near water please, people have passed out and died doing this with breath holds in water. There are several deaths associated with it, on land it's probably safer, clear with your doctor, but 25, 30 breaths exhale hold, 25, 30 breasts again exhale hold, 25 30 breasts again exhale hold.