The four teams left in the NFL playoffs — the Pittsburgh Steelers, Green Bay Packers, Atlanta Falcons, and New England Patriots — have rosters packed with insanely strong, crazy-fast guys. (These are professional athletes, after all.) But even so, there’s a handful that stand out as having almost superhero-level capabilities. Here are the 10 fittest and how they got that way (sneak peek: heavy, heavy weights and no taking it easy during the off-season).

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