The user possesses limitless physical energy, stamina and vitality, is essentially untiring and can keep working, fighting, mowing, etc. at optimal efficiency under any circumstances and for an unlimited duration.
Sakamaki Izayoi (Problem Children are Coming from Another World, Aren't They?)
Ustanak (Resident Evil 6)
Minions of Set (Samurai Jack)
Sonic the Hedgehog (Sonic the Hedgehog)
Alex Mercer (Prototype)
James Heller (Prototype 2)
Sakamaki Izayoi (Problem Children are Coming from Another World, Aren't They?) has exceptionally high power, because of this, as long as his opponent doesn't give up, he can continue to fight them with no signs of fatigue what so ever.
Kanade Tachibana (Angle Beats!) is a prime example of this power, she can participate in any fight against opponents while producing almost no fatigue toxins in her body.
As long as his vengeance isn't fulfilled, Kratos (God of War) can perform limitless physical activities, relentlessly fighting colosssal opponents and entire armies without ever tiring.
Due to their divine nature, The Minions of Set (Samurai Jack) possess a limitless amount of stamina and tireless bodies, allowing them to continue fighting and pursuing jack without the need for rest or sustenance.