The ability to endure beyond the limits of peak human potential. Sub-power of Enhanced Body.
Enhanced Stress Tolerance
Hyper Stress Tolerance
Users can endure physical stresses beyond the capabilities of the greatest humans enabling them 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.
Practitioners of the Hercules Method (The Strange Talent of Luther Strode)
Kobe Shakur (Ripley's Bureau of Investigation)
Patrick Donovan (The Young Guardians); via heat absorption
Black Dynamite (Black Dynamite)
All Demigods (Asura's Wrath)
Asura (Asura's Wrath)
Yasha (Asura's Wrath)
Golems (Crypt of the NecroDancer)
Protagonist characters (The Elder Scrolls series)
Protagonist characters (Fallout); via Endurance skill & various perks
Lightning (Final Fantasy XIII)
Kratos (God of War series)
Antlion Guards (Hλlf-Life 2 series)
Antlion Guardian (Hλlf-Life 2: Episode Two)
Pokémon that can learn "Endure" (Pokémon)
Centroids (Quake: Scourge of Armagon)
Sonic the Hedgehog (Sonic the Hedgehog)
Storm the Albatross (Sonic the Hedgehog)
Zavok (Sonic the Hedgehog)
Fleshes (S.T.A.L.K.E.R. series)
Blind Dogs (S.T.A.L.K.E.R. series)
Boars (S.T.A.L.K.E.R. series)
Pseudodogs (S.T.A.L.K.E.R. series)
Psy Dogs (S.T.A.L.K.E.R. series)
Clawgrip (Super Mario Bros. series)
Geralt of Rivia (Witcher)
Before mastering his Gear Second technique, Monkey D. Luffy (One Piece) endured increasing his blood pressure.
Rob Lucci (One Piece)
Kozuki Oden (One Piece) showing his immense endurance by holding up 9 grown men for an hour, while being boiled in oil.
Naruto Uzumaki (Naruto) has a strong will of endurance.
When in his Shinigami form, Ichigo's (Bleach) endurance is strengthened to the point where he can continue fighting effectively after receiving many injuries.
Despite his old age, Yamamoto (Bleach) is capable of fighting for long periods of time, even when outnumbered, with no visible signs of exhaustion.
Byakuya (Bleach) is a very resilient fighter.
During his fight with Byakuya, Renji (Bleach) is hit directly by every blade from Senbonzakura Kageyoshi, and when he continues to fight he is pierced by five more blades.
Komamura (Bleach) is capable of taking considerable amounts of damage and still continuing to fight, despite the severity of his injuries.
Shūkurō Tsukishima (Bleach) Was able to survive a fatal flow from Byakuya's Senbonzakura and continued fighting until he finally succumbed to his injury.
Vegeta (Dragon Ball series)
Gemma (Ninja Scroll) can endure all injuries and fight back, due to his mastery over his own body.
Capable of fighting on despite excessive blood loss, Ri Shin of the Hi Shin Unit's (Kingdom) immense endurance allows him...
...to fight for four days straight with little to no sleep...
Along with his impressive stamina, Kou Yoku of the Thunder (Kingdom) can endure the rapid attacks and strikes of the Tou Army officers as he fights on.
Since the days of being horribly abused by the citizens of Kantan and his mother, Ei Sei (Kingdom) can endure an excessive amount of pain and blood loss after surviving an almost fatal sword slash across his neck.