Danish freediver Stig Severinsen holds the world record for holding breath underwater. Severinsen made his attempt at the London School of Diving, UK, and managed to hold his breath for 22 minutes. Like many others who have attempted the record, Severinsen achieved this by hyperventilating with oxygen before his attempt – this lowers the body’s CO2 levels, delaying the urge to breathe. This isn’t the only world record held by Severinsen – he also holds world records for longest swim underwater (breath held) and longest swim under ice wearing only trunks and goggles.
source: Free Online Quiz