Mackenzie Harvey joins us today. She is the author of the new book MINDFUL RUNNING and a long-time contributor to a variety of outlets, including Runner's World, ESPN, The Atlantic, Outside Online, Triathlete, and others. I hold a graduate degree in sports psychology and am a USA Track and Field-certified coach and adjunct instructor for running courses at the University of Minnesota. Also, a 14-time marathoner, Ironman, and mom.