Dr. Nick Tiller is an exercise scientist and Research Associate at The Lundquist Institute, Harbor–UCLA Medical Center, and a leading voice in science-based health and fitness. He is the author of The Skeptic’s Guide to Sports Science (Taylor & Francis 2020, named by Book Authority as one of the “Best Sports Science Books of All Time”) and The Health and Wellness Lie (Bloomsbury, 2026). A former physiologist at the English Institute of Sport and an associate professor in the UK, Tiller now focuses on research, writing, and public-facing scientific skepticism. He is a columnist for Skeptical Inquirer, a writer for Ultra-Running Magazine, and an Associate Editor of the International Journal of Sport Nutrition and Exercise Metabolism. In 2023, Tiller was elected as a Fellow of the Committee for Skeptical Inquiry for his ongoing work in science communication and critical thinking education.