Mark is an Air Force Reserve lieutenant colonel, practices family medicine in Ranson and Martinsburg, West Virginia. He is a professor at the West Virginia University School of Medicine and conducts Healthy Running Medical Education courses. He has run competitively for almost four decades, with more than one hundred marathon and ultramarathon finishes, and he continues to compete as a national-level masters runner with an active streak of thirty straight years under a three-hour marathon. Cucuzzella owns the first minimalist running and walking store, Two Rivers Treads, in his hometown of Shepherdstown, West Virginia. He is the author of, "Run for Your Life."