J. Timothy Lightfoot is the Omar Smith Endowed Chair in Kinesiology and the Director of the Sydney and JL Huffines Institute for Sports Medicine and Human Performance at Texas A&M University in College Station, Texas (USA), and holds the rank of Professor of joint appointments on the Texas A&M Genetics Faculty and the Texas A&M Institute for Genome Sciences and Society. His research focus has been the genetic factors that regulate daily physical activity. He is an Associate Editor of Medicine and Science in Sports and Exercise. He was a founding member of the National Exercise Clinical Trials Network and is a Fellow of the American College of Sports Medicine. Monica J. Hubal is an Associate Professor of Kinesiology at Indiana University–Purdue University Indianapolis, USA. She is also an Adjunct Associate Professor of Cellular and Integrative Physiology, a research scientist in the Diabetes Translational Research Center and is affiliated with the Indiana Center for Musculoskeletal Health at the Indiana University School of Medicine. Her research focuses on understanding the systems biology of emergent cardiometabolic disease and the mechanisms driving response to various interventions. She was a principal investigator in the Research Center for Genetic Medicine at the Children’s National Medical Center. She is an Associate Editor for Medicine and Science in Sports and Exercise and Exercise and Sport Sciences Reviews and is a Fellow of the American College of Sports Medicine. Stephen M. Roth is a Professor of Kinesiology and Associate Dean at the University of Maryland in College Park, USA. He has researched the genetic aspects of exercise and sport for over 15 years. He is an author or co-author of over 90 peer-reviewed articles, book chapters, and books. He served as an Associate Editor for Medicine and Science in Sports and Exercise and Exercise and Sport Sciences Reviews. He is a Fellow of the National Academy of Kinesiology and the American College of Sports Medicine.