Stamina

A measure of a character's endurance, Stamina measures their capacity for physical activity. Running, fighting, swimming and flying can use up a character's Stamina quickly. Unlike Health and Mana, Stamina increases very little over time.

Unless modified by a power, Stamina recovery is a constant which is independant of race, class, Constitution, total Stamina, or any other statistic. It is three times faster while sitting than standing, however, and recovery is zero while actually walking. Running, flying and swimming consume stamina, as does swinging a weapon and using weapon, and some other powers.