Yes, I completely agree that there is some trade-off, and that most freedivers use hyperventilation to some extend anyway. What I am scared of though is when someone writes an article like the above mentioned one, where he explains to lay public that they can quadruple their breath-holds with deep breathing and purges, and where he does not mention the disadvantages, risks, and side effects of such hyperventilation at all, and only mentions safety in the compulsory-looking footer. It has nothing to do with a freediving course where you get the complete information and safety is very much in the main focus.
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