With athletics there's not much debate that the Lance Armstrongs and Usain Bolts of the world have physiological advantages over others giving them an edge that

With athletics there's not much debate that the Lance Armstrongs and Usain Bolts of the world have physiological advantages over others giving them an edge that extends well beyond just effort and smart training. Our brains are physiological things as well, with considerable developmental variation from one person to the next.