Fatigue

Fatigue is a physical penalty that will temporarily lower both your character's mobility and also his/her mastery of any physical skills. For example, if the fatigue penalty is -6% and his/her sword skill level is 42%, the effective skill level is 36%.

Your character will become fatigued when running, fighting and doing other strenuous tasks. A low Endurance will make your character tire faster.

Simply [.] rest with [-] or [#][s]leep to recover from fatigue.