In this episode, we bring Alex Hutchinson back on the show to do a deep dive into a smorgasbord of his recent Sweat Science articles.

We cover everything from what makes the Nike 4% Vapor Fly shoes work (foam or the carbon fiber plate?) to what we can learn from elites on running form to how to fuel a cross-Antarctica ski expedition.

Plus, we get Alex's predictions on Kipchoge vs. Farah coming up at the London Marathon!

Alex has also been on episodes 48, 64, 81, and 110 of this show. You can also find all of Alex's Sweat Science articles here:

https://www.outsideonline.com/1745511/alex-hutchinson

Also check out Alex's book as well if you haven't already... Endure: Mind, Body and the Curiously Elastic Limits of Human Performance.