I like to run but not at these distances. 5k or 10K are my favorites. With that being said the distances(1/2 or full marathons) are not the reason. Its usually some underying condition that is the cause. A genetic heart issue or something like that was not known. I co-worker also mentioned(1/2 and full marathon runner) that most of these(collapses, cardiac issues, etc.) happen during the 1/2 maraton beacuse people feel they do not need train for them like you would for a full. So the undelying cause can remain hidden in some cases to the day of the race. I had never thought about that but it does make sense.
