2018’s World’s Strongest Man Hafthor Bjornsson follows it. Four-time World’s Strongest Man Brian Shaw follows it. Stan Efferding invented The Vertical Diet to meet the needs of the world’s most elite athletes, but it’s also intended for the everyday person — he says his two children and his octogenarian father follow it as well.
So what’s it all about? For this article we spoke to Efferding himself to find out the ins and outs of this mysterious but hard-to-ignore system that has a extraordinarily big emphasis on optimizing digestion.