Is it possible for a person to die of cardiac arrest while running a marathon?

Rare but possible: Death from cardiac arrest during a marathon is rare. Still, it is important for anyone with a family history of sudden death or cardiac disease to undergo medical evaluation before strenuous activity. Personal medical history, age, overall level of health and fitness, hydration status, and environmental conditions, all can play a role. Consult your doctor prior to any extreme fitness pursuits.

Yes: Unfortunately cardia arrest can occur in seemingly healthy athletes- events have happened everywhere including races, basketball games and even patients working out in the gym. Major risks for cardiac arrest include having high cholesterol, smoking and having a history of cardiac disease in your family.

Marathoning NG: Not only is it possible, this type of extreme exertion can actually increase your chances of cardiac arrest. Studies have shown that marathon running causes release of troponin from the heart which is a sign of cardiac damage. Marathoning also raises c reactive protein levels.

Yes: Always get medical clearance before attempting any new or significant physical activity. There are reports of people dying during marathons from cardiac problems. It can be a tremendous assault on the cardiovascular system. Train carefully and wisely and with a coach/mentor if possible. Listen to your body. Get medical clearance -- may need stress test. Good luck.

Yes: It has happened before. Some people take up the challenge to run the marathon without having a physical first and also run it without being thoroughly trained. See a Dr. before and do your best to be safe. Even the most elite runners have died before- hidden cardiac problem, etc.