This attribute represents your character's ability to push themselves physically. It is used up by running, dodging and other forms of physical exertion, and can be restored by resting. It is determined by a combination of the Body and Ego attributes and the Athletics skill.
You regain about 1/30th of your stamina every ten in game minutes. Stamina Points can go negative. They will display as 0 while negative but they will still take the full amount of time to regain.