And what about people like David Blaine or Tom Sietas? Sietas held his breath underwater for over 22 minutes (world record). I know they train for it like months and even years, but doesn’t holding your breath = no oxygen to brain?
Permanent brain damage apparently occurs just after 4 minutes of lack of oxygen to the brain, so why are freedivers left generally unscathed after 8 or 10 minutes without air?
In: Biology
They have increased their lung capacity and modified their metabolism through exercise and training. Think of it this way, there are drunks and drug addicts who come into the Emergency Room with blood alcohol levels that would kill an ordinary person, but because they have been abusing themselves for so long their bodies have adjusted. If a person who had never shot heroin took as big a dose as a long term addict, the first timer would die, but the long time user would just be normal.
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