I love to compete in running races.
Good for you. It is healthy lifestyle. Do you also do running over trails?
No, i am a flat track or street marathon runner.  Do you know anything about marathons?
I only know that it is a long-distance running race. Do you have any interesting fact about it?
Not really. I would be interested to know how long humans have been doing log distance running.
Humans are very well adapted at running long distances compared to animals. Thus, it should have quite history