A list of the top 100 track & field athletes using the social media service Twitter.
Jamaican sprinter Usain Bolt leads the way.
She's nervous and excited about her marathon debut.
Real-time updates on a participant's progress will be available via posts to Facebook, Twitter or email.
Seven-time Tour de France winner doesn't show up in official results.
There is a new way to follow the team at Competitor Running, just follow us on Twitter! We will be updating our Twitter page daily to