Marathon running is generally safe for your heart, but be cautious if you have an underlying condition.
Just one out of every 184,000 runners succumbs to cardiac arrest after a marathon.
This makes marathon running safer than many other activities.
For people with underlying heart conditions, marathons can be the trigger that sends their hearts over the edge.
Running 26.2 miles may make you sweaty and sore, but it won't give you a heart attack, found a new study.
The finding offers a comforting counterpoint to the media frenzy that often follows when someone drops to the ground with cardiac arrest during a marathon. In the majority of cases, the new study found, athletes had a preexisting heart condition that would've likely become a problem even if victims had never signed up for a long-distance event.
On the other hand, even though exercise is essential for health, intense activity seems to be able to trigger fatal heart attacks in people who are already susceptible. So, anyone with a family history or suspicious symptoms should talk with a doctor before moving forward on a training program.