Run Action

A character can double his base movement by running. Running is considered a full-move action; the character can't do anything else in the same combat round that he runs. Running on a battlefield is dangerous; the character loses all Dexterity bonuses to his Armor Class and suffers a +1 AC penalty on top of that. In addition, he is considered to be charging (with no attack) if he runs into a square threatened by an opponent with a set spear.

Characters can maintain a run, however, each round of running costs 1 point of Fatigue. Outside of combat, they can run for a number of rounds equal to their Constitution score. After that, they must stop and rest.