Stamina

Stamina is your ability to do an action for a certain amount of time. Many things will consume bits off your stamina bar. This includes running, jumping, grappling, and using abilities.Once your stamina runs out, your character will "take a break" for a few seconds. This will open him up to attacks. Drinking certain potion/herbs helps restore this.

Some characters need to worry more about it than others. Striders, for example, usually have a large amount of Stamina, but warriors fall a little off.