Beware mice and men swimming in gene pool

Beware mice and men swimming in gene pool(2005, Jul 23) The Guardian, by Harry Pearson[link]

Quoting: "Beasts of a more real sort may also soon be playing a much bigger part in sport. A geneticist recently told me that if I wanted to see the future of athletics I should go to Belgium and look at a field of pedigree beef cattle. Having spent a good deal of time in Belgium doing just that I knew instantly what he was talking about....Slow-twitch fibre is the one associated with cardio- vascular muscles and therefore endurance. According to National Geographic magazine, Evans's mice can run for an hour longer than normal mice, are resistant to weight gain no matter what they are fed on and remain at peak fitness even when they take no exercise.