that Guinness had set the world record at 13 minutes. So, basically you breathe pure O2 first, oxygenating your body, flushing out CO2, and you are able to hold much longer.
Ideea era ca respiri mai intai oxigen pur, iti oxigenezi corpul si elimini cat mai mult dioxid de carbon, si astfel este capabil sa rezisti mult mai mult fara sa respiri.