Not all heroes wear capes, and not all athletes play sports. Some of them, like retired U.S. Marine officer George Hood just exercise very, very intensely. In 2015, Hood set the Guinness World Record for “planking,” a competitive exercise that entails using one’s forearms and toes to keep the legs and torso elevated several inches above the ground, straight like a wooden plank.
Benjamin Franklin nailed it when he said, "Fatigue is the best pillow." True story, Benny. There's nothing like pushing your body so far past exhaustion that you'd willingly, even longingly, take a nap on a concrete slab.