It's normal and useful if you want to improve your freediving skills! Holding your breath underwater can be dangerous and should never be done without a buddy. But holding your breath on land without using a physical obstruction is completely safe. There are plenty of source available online to learn to hold your breath for long. Check out O2 and CO2 tables and apnoea training on freediving sites. My best is 4:55
I like to see how long I can hold my breath.. and I'm an adult
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It's normal and useful if you want to improve your freediving skills! Holding your breath underwater can be dangerous and should never be done without a buddy. But holding your breath on land without using a physical obstruction is completely safe. There are plenty of source available online to learn to hold your breath for long. Check out O2 and CO2 tables and apnoea training on freediving sites. My best is 4:55