What Does Marathon Training Do to Your Body?

NPR reporter Elissa Nadworny investigates the physiological impact of marathon training to address concerns about joint health and physical stress. By undergoing rigorous medical testing, including bone scans and VO2 max assessments at Ball State University, she explores whether the intense preparation is beneficial or harmful.

Experts conclude that while marathon training carries a risk of overuse injuries, it generally improves cardiovascular health, muscle function, and bone density when approached intelligently. The report highlights that recovery through nutrition, hydration, and sleep is essential to managing the stress placed on the body.