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" The Iceman " Wim Hofclaims a compounding of respire employment and cold vulnerability can bring people many benefits , including increased willpower ; fat going ; a " bastioned " immune response ; " balanced " hormones ; and reduce redness .

The panel is still out onwhether the Wim Hof Method ( WHM ) has any of these benefits , but are the teaching also serious ?

Wim Hof, a middle-age white man long reddish hair and a beard, pictured talking to one of this trainees in Przesieka, Poland.

Wim Hof talks to one of his trainees in Poland in 2016.

expert secern Live Science that some of Hof ’s practices , as usher in some video online , lay a risk of drowning , as well as potentially dangerous heart - calendar method irregularities . However , a interpreter for the WHM said these TV are not brooding of the official method acting , but plainly examples of Hof doing " extreme exploit , " and that they supply safety videos and didactics on their website explain how to safely practice the WHM .

Whatever the prescribed direction on the WHM website states , some Wim Hof - branded social media videos give a very different , and serious , notion of how to rehearse the method acting , experts say . What ’s more , there is grounds that hoi polloi have break doing WHM external respiration exercises while in pee .

Related : How to float in the sea

Wim Hof method trainee screams as he is in ice cold water, 2016 in Przesieka, Poland.

A Wim Hof method trainee in Poland in 2016.

What is the “Wim Hof Method”?

The canonical WHM respiration exercisedescribed on the company ’s websiteinvolves take deep , straight breather , a contour of deliberate hyperventilation . After hyperventilating , you hold your breather " until you sense the urge to breathe again . "

Separately , the WHM also imply " cold therapy , " or exposure to cold . The WHM website say cold therapy can imply frigid showers and ice bath . However , insocial media videos , Hof and other practitioners often inundate themselves in bodies of water outside .

There are also paid WHM online courses , which Live Science did n’t get at while reporting this story . ( Nor did Live Science look on theWHM - focalize episode of " The Goop Lab " , featuring Gwyneth Paltrow . )

Unidentified man in a lake, in ice-hole of icy water covered with white snow and ice.

Jumping into cold water can set off the body’s “cold shock response."

WHM safety videosandwritten safety instructionswarn against combining any thick respiration exercises and piss — but Hof’ssocial media videosoften show him seemingly doing just that . For instance , a2021 YouTube videoshows Hof taking repetitive deep breathing spell and then plunging his psyche underwater to hold his breath .

" I did that every solar day since 44 years ago up till now , " Hof enunciate in the video recording . After coming out of the water , he tote up , " Back then , I was alone . Right now , millions are doing it ! " The video , which had more than half a million views as of April 3 , then cuts to a montage of people going into insensate water to come after Hof ’s Pb .

Related : Why do we shiver when we ’re cold ?

Two women, one in diving gear, haul a bag of seafood to shore from the ocean

Dangers of breath-holding in water

Experts told Live Science that , if people do as Hof does in that 2021 video , they can face living - threatening consequences .

Hyperventilation can cause hoi polloi to nigrify out underwater . Before the WHM gained popularity , X ' worth of reportsdescribed people drowning after hyperventilating and then holding their breath underwater , something free frogman sometimes do because they do n’t employ breathing apparatuses .

Hyperventilation and breathing time holding decrease the carbon dioxide in the stemma and the press the gasolene would usually exert in profligate vessel . This delays the mastermind ’s signaling to resurface and breathe , fit in to a 2015Centers for Disease Control and Prevention report . That ’s because , normally , the signal to respire is trigger off when C dioxide level go up in the ancestry .

a researcher bends over and points to the boundary between a body of water and ice

" If you slay it , it ’s like you are gambling with your life,“Dr . Frank Pernett , a pulmonic medicine doctor and doctorial candidate at Mid Sweden University , told Live Science .

Hyperventilation alone can make masses pass out , as can following hyperventilation with a deep breath , Pernett said . you could alsoblack out from just doing a breathing time hold . In all these scenarios , the red ink of origin - borne carbon paper dioxide make blood vessels to narrow andprevents enough blood from progress to the brain , induct unconsciousness .

That ’s why combining any form of deep breathing exercise or extended breath hold with water is a unsound estimate . Pernett , a free diver himself , said three of his friends , all train diving instructor , have died while training alone in pools . " If you are underwater and you faint , and nobody is there to help , you will die , " he said .

A man in the desert looks at the city after the effects of global warming.

Related : How does a person freeze to last ?

This is true in piss of any temperature , but stale water brings singular risks because it can trigger the cold shock response , a reflex that cause you to gasp , the National Oceanic and Atmospheric Administration ( NOAA ) warns .

That reply make jumping into cold water — as Hofandhis followersdo in some videos — especially unsafe because a individual pant underwater can be enough to cause someone to swim , saidMike Tipton , a professor of human and applied physiology at the University of Portsmouth in the U.K. ( Tipton has write a guide onminimizing the risks of cold - water supply therapiesand advise cold - water supply swimming groups . )

a tired runner kneels on the ground after a race

Tipton also explained that , when your face run underwater , your dead body tries to slow your heart rate , but the cold-blooded shock response accelerate it . Activating both response at the same time mixes the signals sent to the philia in what ’s calledautonomic conflict , potentially leading toarrhythmias , or irregular heartbeats . NOAA mark these arrhythmias , as well as spikes in heart pace and rakehell pressure tie to the cold shock response , can pose a peril of nitty-gritty loser and virgule in masses vulnerable to the conditions .

" What Wim Hof did is about the most dangerous matter you’re able to do when you go into cold water , " Tipton told Live Science , in reference to the 2021 picture .

Do as I say, not as I do

Multiple people who have reportedly done the WHM breathing utilisation in H2O have died .

In 2016 , Amsterdam - base newspaperHet Parool reportedthat at least three citizenry had died after practicing the WHM — specifically while unite the ventilation techniques with water absorption . JournalistScott Carneytold Live Science that he’slinked 31 deathsto the method , draw frompublic news reportsand hoi polloi whoprivately evidence himabout deaths related to the WHM . Most were drownings , but none have yet been reassert to have affect the WHM in a homage of law , Carney noted .

However , WHM representative say they make clear their two practice should n’t be combined .

a firefighter wearing gear stands on a hill looking out at a large wildfire

" Since we heard about people potentially drowning because of malpractice of the WHM breathing in urine in 2015 , we monish people on how to practice the WHM breathing exercises right and how not to rehearse the WHM external respiration exercises,“Isabelle Hof , a spokesperson for the WHM and Wim Hof ’s daughter , told Live Science .

relate : Free divers ' spunk rates can drop as low as 11 beats per arcminute

Of the 2021 telecasting , she narrate Live Science that the picture is n’t part of the " stock WHM curriculum " and not an instructional guide . WHM safety picture and its website tell people to sit down or dwell down in a good place during the breathing use and to never practice it or any form of deep ventilation ahead of or during immersion in or over urine .

A close-up of a doctor loading a syringe with a dose of a vaccine

Isabelle Hof sent Live Science the protocols for " level 1 " certified WHM teacher , and these include many of the guard backsheesh raised by Tipton and also warn of autonomic difference of opinion . However , this more - detailed selective information is throw to aspiring WHM teacher who pay for a course and is not freely available on the fellowship ’s internet site .

The WHM website’sfrequently ask questionspage advises mass to refer a medical professional before attempting the method — something Tipton also recommended for people plan to enter cold-blooded water . But under the question " How do you prepare yourself before going into the cold ? " the site simply links to avideo of Hoftelling viewers to trust their gut , tone and intuition .

— Can humans sense wetness ?

An illustration of microbiota in the gut

— Everybody halt ! The skill of the diametric bear society

— These deep - ocean weirdo hold their breathing place for minute of arc at a time

Ultimately , the arcdegree of danger posed by the WHM depend on whether the method embrace what Hof and his following do in popular Wim Hof - branded video or just what is write on the WHM site .

an illustration of DNA

" If you retrieve that the Wim Hof Method is just the write instructions on his internet site , then there may not be a major problem because it includes monition , " Carney narrate Live Science . But if everything Wim Hof does is take as an example of his method , " then there ’s a vast problem with the Wim Hof Method because he ’s constantly demonstrating practices which are dangerous . "

This article is for informational purposes only and is not have in mind to offer aesculapian advice .

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