Superhuman stamina

Superhuman stamina is the ability to function physically and mentally, without tiring or straining oneself. The person's body is highly resistant to the build-up of fatigue toxins in their blood, allowing them to be physically active for considerably longer periods of time than the average human. Barbarians possess the most powerful stamina, as they are unable to become tired, and do not need food, water, oxygen or sleep and vampires can exert themselves physically for longer periods of time than humans.

Characters with Superhuman stamina
Barbarians

John Turner

Armageddon

Robb'yn

King Vigoroso 

Vampires

Jennifer Moore

Hal Fisher