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Croatian freediver Vitomir MariÄiÄ set a new world record by holding his breath for 29 minutes and 3 seconds, surpassing the previous record by nearly five minutes. His attempt was oxygen-assisted, allowing him to breathe pure oxygen beforehand.
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A Freediver Smashed the Longest-Held Breath RecordStefano Oppo - Getty Images
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The act of breathing has been central to life on Earth since the beginning, and the average human will take more than 600 million breaths in a single lifetime. But thereâs a specific group of humansâa subclass of freedivers known as apneistsâwho train their minds and bodies to efficiently halt this intuitive autonomic function, far exceeding the typical 30-to-90-second limit of breath-holding.
Take, for instance, Croatian freediver Budimir Ć obat. On March 27, 2021, Ć obat held his breath underwater for an astounding 24 minutes and 37 secondsâa feat that was only possible thanks to minutes of huffing pure oxygen before making the attempt.
Four years later, fellow countryman and freediver Vitomir MariÄiÄ exceeded this world recordâand it wasnât even close.
On June 14, 2025 in Opatija, Croatia, MariÄiÄ performed an oxygen-assisted breath hold that shattered Ć obatâs by nearly a , clocking in at . A member of the Adriatic Freediving group, MariÄiÄ performed the attempt in a three-meter-deep pool at the townâs Bristol Hotel in front of a 100-person crowd, according to the website Divernet. He says he took on this record as both a personal challenge and a way to raise awareness for .
Vitomir MariÄiÄ is a Croatian freediver who broke the world record for the longest breath hold, achieving 29 minutes and 3 seconds.
Oxygen assistance allows freedivers to breathe pure oxygen before their attempt, significantly increasing their breath-holding capacity.
The previous record was set in 2021 and was nearly five minutes shorter than MariÄiÄ's new record of 29 minutes and 3 seconds.
MariÄiÄ's record of 29 minutes and 3 seconds exceeds the breath-hold of bottlenose dolphins but is still shorter than many other marine mammals.
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âAfter the 20-minute mark, everything became easier, at least mentally,â MariÄiÄ told Divernet. He clarified, however, that the experience âgot worse and worse physically, especially for my diaphragm, because of the contractions. But mentally I knew I wasnât going to give up.â
Denying your body life-supporting oxygen isnât something to be taken lightly. While the body has various areas that detect oxygen levels, the main system is a group of specialized cells in the brain and neck known as chemoreceptors. These cells track the balance of carbon dioxide and oxygen in the body. When someone holds their breath, CO2 rises and drives an increased desire in the brain to breathe. Eventually, the diaphragm will begin contracting involuntarily, which is typically when untrained apneists will break down and start gulping down air.
However, MariÄiÄ pre-gamed his world-record-breaking attempt by inhaling pure oxygen for 10 minutes before submersion. This offsets that initial oxygen-carbon dioxide balance, allowing freedivers to hold their breath for significantly longer than is possible for our unaided biology. Thatâs why the world record for unaided breath holding is a much shorter (but still very impressive) 11 minutes and 35 seconds.
As ScienceAlert notes, MariÄiÄâs world-record fully doubles the maximum breath hold for bottlenose dolphins, and nearly matches the abilities of the harbor seal. However, humans have zero hope of ever snatching any world record from marine mammals entirelyâthe Cuvierâs beaked whale can stay submerged underwater for more than three hours.
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