And, at the 2011 world championship (pictured above), Allyson lost in the 400m by 0.03 seconds to a Botswanan with massive biceps. The NYT has an admiring profile on the Botswanan runner today:
The Footprints on a Path to Gold
Amantle Montsho Overcomes Obstacles to Become a Track Champion
but haven't we learned 24 years after Ben Johnson that huge arm muscles in a sprinter are a dead give-away? Here's the picture splashed by the Times:
I went to the 1984 Olympics at the L.A. Coliseum and saw an NFL receiver's wife with massive arms edge out a skinny Florence Griffith-Joyner for gold in the 200m. Then Flo-Jo lost the 1987 world championships to an East German with big arms. So, she showed up in 1988 looking like Wonder Woman, and set all the records, which still stand. She died in 1998.