"You must believe nothing." So says Tim Noakes, one of the most well respected exercise scientists in the running world. Author of Lore of Running and Waterlogged, Tim has radically changed his beliefs throughout the course of his 30+ year career, always in response to his own questions and the answers (or lack thereof) found in scientific literature. From discussing why studies of 7 people aren't that useful to talking about his next big interest (infant nutrition), Tim is a wealth of information and well worth listening to on your next long drive.