Emory Health Sciences Mar 31 2025 While more people than ever are running marathons in the U.S., the risk of dying from a heart attack during a run has fallen dramatically in recent years. That's a key conclusion from a new study by Jonathan Kim, associate professor in the Emory School of Medicine. Kim's research is a follow-up to a study he published in 2012 – the first investigation into unexpected cardiac arrests during long distance running events. The new findings, published in JAMA,