Noel Brick, PhD, is a British Psychological Society–chartered psychologist, a lecturer in sport and exercise psychology at Ulster University, and a researcher on the psychology of endurance performance. He has published research in the most prestigious sport and exercise science journals, such as Medicine and Science in Sports and Exercise (flagship journal of the American College of Sports Medicine) and Psychology of Sport and Exercise (flagship journal of the European Federation of Sport Psychology). He has presented his research at global academic conferences, including the annual congresses of the Association for Applied Sport Psychology, the British Psychological Society, the European College of Sport Science, and the European Federation of Sport Psychology. Noel has completed more than thirty marathons and ultramarathons. He is a native of Kerry and lives in County Antrim, Ireland.

Scott Douglas is a contributing writer for Runner's World, and has held senior editorial positions at Runner's World and Running Times. He is the author or coauthor of several books, including Running Is My Therapy,Strong Minds, Advanced Marathoning, and the New York Times bestsellers Meb for Mortals and 26 Marathons. He has written about fitness and health for Slate,The Atlantic,The Washington Post, and Outside, among other outlets. Scott has run more than 100,000 miles since taking up the sport in 1979. He lives in South Portland, Maine.

Alex Hutchinson is the New York Times–bestselling author of Endure and a National Magazine Award–winning journalist whose work appears in Outside, The Globe and Mail, The New York Times, The New Yorker, and other publications. He lives (and runs) in Toronto.