To answer the comments that this had...I actually made it grainy on purpose. Also, since my focus was the track (the bright portion in front of the runners) I was less concerned with their focus since when I was taking the picture I was trying to capture the transient nature of the runners on a constant road. In any case, thanks for the comments.
Nice idea - the track. I think I would have liked the depth of field to have included the feet. Also the space at the bottom feels too big, maybe crop off a little.