The Sprinter's Brain

American Scientist: "If American sprinters Tyson Gay and Walter Dix reprise their race in the U.S. Olympic trials at the Olympic finals in Beijing, you will see the athletes crouch low over the starting blocks. Gay's right foot will be in the rear position on the blocks; Dix prefers to have his left foot in the rear position.

It might be a little awkward, but someone ought to tap Dix on the shoulder and tell him to consider switching the position of his legs. And not just Dix -- every sprinter in the Olympics ought to think about starting with his or her right foot in the rear position."