Endurance

The ability to endure difficult or unpleasant stresses beyond the limits and capabilities of the greatest humans. This attribute differs from Stamina as it enables users to do things such as operating on a "low power setting" (being able to operate efficiently for extended amounts of time), holding their breath for large periods of time, remain calm through stressful or painful situations, tolerate extreme hunger, unbearable thirst, and strong urges to sleep.