90 Days to Black Belt — What It Actually Takes @timferriss
90 Days to Black Belt — What It Actually Takes  @timferriss
Uploaded April 2026 | Updated September 2026, 2 weeks ago
Daredevil Michelle Khare lives life to the extreme in Challenge Accepted, amassing more than 6 million followers and more than 1 billion views. Across the show, you'll see Michelle attempt everything from Tom Cruise’s Deadliest stunt to Harry Houdini’s water torture cell to trying to earn a black belt in taekwondo in only 90 days.

Follow Michelle: @MichelleKhare

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Tim Ferriss is one of Fast Company’s “Most Innovative Business People” and an early-stage tech investor/advisor in Uber, Facebook, Twitter, Shopify, Duolingo, Alibaba, and 50+ other companies. He is also the author of five #1 New York Times and Wall Street Journal bestsellers: The 4-Hour Workweek, The 4-Hour Body, The 4-Hour Chef, Tools of Titans and Tribe of Mentors. The Observer and other media have named him “the Oprah of audio” due to the influence of his podcast, The Tim Ferriss Show, which has exceeded one billion downloads and been selected for “Best of Apple Podcasts” three years running.

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90 Days to Black Belt — What It Actually Takes

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