Adam Hodges, Ph.D. is a USA Triathlon certified coach and American College of Sports Medicine certified personal trainer who writes about the three most important muscles for runners and how to train them.
Adam says, "Running, like any physical activity, involves coordination among a group of muscles to propel you forward. So singling out one of those muscles as the “most important” risks oversimplifying the process. Yet certain muscles do play a more important role than others in running. And they may not be the ones that first pop into your mind."