Endurance

A character with endurance proficiency is able to perform continual strenuous physical activity for twice as long as a normal character before becoming subject to the effects of fatigue and exhaustion. In those cases where extreme endurance is required, a successful proficiency check must be made. Note that this proficiency does not enable a character to extend the length of time that he can remain unaffected by a lack of food or water.

Dwarven Endurance Proficiency

A hardy and resilient race, dwarves automatically gain this proficiency at no cost.