Amy Dodson suspended six months

COLORADO SPRINGS, Colo. -- Amy Dodson, one of the world's top amputee runners and triathletes, has received a six-month suspension for using a banned substance at a recent 50-kilometer race.

The U.S. Anti-Doping Agency announced the suspension Friday, the result of Dodson's positive test for a weight-management drug Dodson said she took in an over-the-counter product that she didn't realize contained a banned substance.

Her positive test came after a race in January and the six-month ban started April 29.

Dodson lost part of her lung and her left leg to cancer in 1983. She began distance running in the late 1990s and has since become one of the world's top amputee runners and triathletes. She tested positive at a 50k race in Arizona, where she finished in 5 hours, 4 minutes, 1 second.