1.   Runners had to acclimatize to the humid tropical conditions.

2.   Most runners will have their best splits on the downhills.

3.   If someone makes a false start, the race is immediately stopped and the runners have to start again.

4.   And though a few top runners have corporate sponsors, the lack of prize money insures that most competitors are strictly amateurs.

5.   As a result, the elite runners had to establish their own pace.

6.   As the lanes narrowed approaching Piedmont Park, runners had to stop and walk, and that made some grumble.

7.   At the end of the other will be three parallel lines meaning the runner has to backtrack and give three long toots.

8.   Back in Washington, runners have lots of different reasons for gearing up for Boston.

9.   Back then, he says, runners had to pass a pre-race physical.

10.   A marathon runner has to be conditioned and focused.