'Running' in the Bible

Now David was sitting between the two gates: and the watchman went up to the roof of the gate unto the wall, and lifted up his eyes, and looked, and, behold, a man running alone.

And the watchman saw another man running; and the watchman called unto the porter, and said, Behold, another man running alone. And the king said, He also bringeth tidings.

And the watchman said, I think the running of the foremost is like the running of Ahimaaz the son of Zadok. And the king said, He is a good man, and cometh with good tidings.