[sentimentscan]

Could you please explain more about the Ref[2], what does it mean beyond what is in article and how serious is it? "These findings suggest that breath-hold diving training over several years may cause mild, but persistent, short-term memory impairments"

Can you tell more about recreational nitrous oxide and when does the "damage occur"? Is there the same thing with wim hof? (like for example with oximeter 80 Sp02 or below?) I got in wimhof/oxide around 80 Sp02 the interesting thing is I got this feeling with fighting to hold my breath but below 90 I kinda needed to convince myself that I should breath in both cases,

[maebert]

Key difference here is that freediving is apnea-induced hypoxia, whereas breathwork is literally the opposite: hyperventilation-induced hyperoxia.

So while interesting as a study, I don't think it offers any insight into the kind of breathwork described in the nature study.

[eigenschwarz]

Being a non-expert I can't attempt to speculate on your questions in good faith! All I was suggesting to the parent is that perhaps these articles offer as evidence of damage being done without pushing to the point of unconsciousness? Feedback is definitely welcome by an expert.