Girl's odyssey shows challenge of fighting obesity

In this photo taken Nov. 19, 2008, Registered Nurse Rebecca Allison measures Paris Woods waistline as she takes part in her first session of a 20 month obesity prevention study at Rush University Medical Center in Chicago. (AP Photo/M. Spencer Green)

February 1, 2010 12:05:13 PM PST
Paris Woods is hardly a poster child for the obesity epidemic. Lining up dripping wet with kids on her swim team, she's a blend of girlish chunkiness and womanly curves.