How can someone hold their breath underwater for more than 20 minutes?
In: Biology
Basically lots of practice. When you hold your breath a lot your body learns what it can slow down to let you stay under longer. When you don’t have much practice your body thinks it’s an attack and you gotta fight your way out so it speeds up your heart and makes it hurt. Professional breath holders hearts slow down significantly once they begin. Also for the really long ones they breathe pure oxygen for a few minutes before so their blood has extra stored up.
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