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WARNING: AS I\u2019VE EMPHASIZED BEFORE, NEVER DO BREATHING EXERCISES IN WATER OR BEFORE TRAINING IN WATER. SHALLOW-WATER BLACKOUTS CAN BE FATAL. Wim Hof (@Iceman_hof) is a Dutch world record holder, adventurer and daredevil, commonly nicknamed \u201cThe Iceman" for his ability to withstand extreme cold. He is the creator of the Wim Hof Method and holds more than 20 world records. Wim is an outlier of outliers, as he routinely asks scientists to scrutinize and validate his feats. Here are just a few examples: In 2007, he climbed past the \u201cdeath zone" altitude on Mount Everest (~7,500 meters) wearing nothing but shorts. In 2009, Hof completed a full marathon above the polar circle in Finland, in temperatures close to \u221220 \xb0C (\u22124 \xb0F). Dressed in nothing but shorts, Hof finished in 5 hours and 25 minutes. Hof holds the current Guinness World Record for the longest ice bath, now set at 1 hour 53 minutes and 12 seconds. But it\u2019s not just cold. In 2011, he ran a full marathon in the Namib Desert without water. The run was performed under the supervision of Dr. Thijs Eijsvogels. He can also run at altitude without suffering from altitude sickness. In the same year, he was injected with toxins under doctor supervision and demonstrated that he could effectively control his autonomic immune response. Wim was able to raise his cortisol levels and lower his blood concentrations of cytokines (inflammatory mediators) using solely his meditation and prep techniques. Not only this, but he was able to train others to achieve the same effect\u2026 with only 4 days of training! We dig into all this and more. I loved this conversation and hope you do, too... All show notes, links, and resources from this episode can be found at http://fourhourworkweek.com/podcast This episode is brought to you by Audible, which I have used for years. I love audiobooks. I have two to recommend right off the bat: The Graveyard Book by Neil Gaiman \u2013 Perhaps my favorite audiobook of all time. Vagabonding by Rolf Potts \u2013 This book had a huge impact on my life and formed the basis for a lot of what has become The 4-Hour Workweek To get your free audiobook and a free 30-day trial, go to Audible.com/Tim. You can choose from the two audiobooks listed above or from 180,000+ audio programs. They offer audiobooks, magazines, newspapers and even classes. It\u2019s that easy. Go to Audible.com/Tim and grab your free audiobook. This podcast is also brought to you by MeUndies. Have you ever wanted to be as powerful as a mullet-wearing ninja from the 1980\u2019s, or as sleek as a black panther in the Amazon? Of course you have, and that\u2019s where MeUndies comes in. I\u2019ve spent the last 2-3 weeks wearing underwear from these guys 24/7, and they are the most comfortable and colorful underwear I\u2019ve ever owned. Their materials are 2x softer than cotton, as evaluated using the Kawabata method. Check out MeUndies.com/Tim to see my current faves (some are awesomely ridiculous) and, while you\u2019re at it, don\u2019t miss lots of hot ladies wearing MeUndies.

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Past guests on The Tim Ferriss Show include Jerry Seinfeld, Hugh Jackman, Dr. Jane Goodall, LeBron James, Kevin Hart, Doris Kearns Goodwin, Jamie Foxx, Matthew McConaughey, Esther Perel, Elizabeth Gilbert, Terry Crews, Sia, Yuval Noah Harari, Malcolm Gladwell, Madeleine Albright, Cheryl Strayed, Jim Collins, Mary Karr, Maria Popova, Sam Harris, Michael Phelps, Bob Iger, Edward Norton, Arnold Schwarzenegger, Neil Strauss, Ken Burns, Maria Sharapova, Marc Andreessen, Neil Gaiman, Neil de Grasse Tyson, Jocko Willink, Daniel Ek, Kelly Slater, Dr. Peter Attia, Seth Godin, Howard Marks, Dr. Bren\xe9 Brown, Eric Schmidt, Michael Lewis, Joe Gebbia, Michael Pollan, Dr. Jordan Peterson, Vince Vaughn, Brian Koppelman, Ramit Sethi, Dax Shepard, Tony Robbins, Jim Dethmer, Dan Harris, Ray Dalio, Naval Ravikant, Vitalik Buterin, Elizabeth Lesser, Amanda Palmer, Katie Haun, Sir Richard Branson, Chuck Palahniuk, Arianna Huffington, Reid Hoffman, Bill Burr, Whitney Cummings, Rick Rubin, Dr. Vivek Murthy, Darren Aronofsky, and many more.

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