You have hightened stamina and can endure long periods of physical exertion, such as prolonged combat, carrying a lot of weight, going without rest for long periods of time or long distance running. Whenever you are forced to make an Athletics check due to running or exhaustion, you may use this trait as a bonus on the check. In addition, you can be awake for a number of extra hours equal to the value of this trait before you start accruing wounds.