Tribe of Mentors is a new short-form podcast from bestselling author and early-stage investor, Tim Ferriss. This episode features Katrín Davíðsdóttir, an Icelandic CrossFit athlete. She is the 2015 and 2016 CrossFit Games women's champion, which christened her "Fittest Woman on Earth." Katrín is the second woman to repeat as champion, following in the footsteps of her countrywoman, Anní Þórisdóttir.