In World War II patriotic solider Steve Rogers recipient of the "Super Soldier Serum" became the living symbol of freedom, Captain America. Left for dead while frozen in ice, the star-spangled hero with an indestructible shield awoke years later to continue his never-ending battle for liberty.

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Captain America represented the pinnacle of human physical perfection. He experienced a time when he was augmented to superhuman levels, but generally performed just below superhuman levels for most of his career. Captain America had a very high intelligence as well as agility, strength, speed, endurance, and reaction time superior to any Olympic athlete who ever competed. The Super-Soldier formula that he had metabolized had enhanced all of his bodily functions to the peak of human efficiency. Most notably, his body eliminates the excessive build-up of fatigue-producing poisons in his muscles, granting him phenomenal endurance.