In episode 7 of the Kicksology podcast, host Brian Metzler is joined by Chris McDougall, the New York Times best-selling author of "Born to Run." They delve deep into the evolution of running shoes in the 21st century, focusing on the drastically different designs, how and why trends have shifted since the minimalist boom of a decade ago and also the best — and worst — sociological aspects of running and running shoes. They also talk about how we, as humans, consume running shoes and what might be next in running.

Metzler is the author of the book, "Kicksology: The Hype, Science, Culture and Cool of Running Shoes" and a long-time runner who has competed in races on the track, roads and trails from 50 meters to 100 miles.

In each episode of Kicksology, host Brian Metzler engages shoe designers, entrepreneurs, shoe company executives, retailers, athletes and physical therapists to talk about the evolution of running shoes, new shoe launches, breakthrough technologies, the biomechanics of running and everything else running-shoe related.