Barrios originally finished 4th in the 2012 Summer Olympics .
Barrios moved up a position after Darya Pishchalnikova was disqualified for testing positive for the anabolic steroid oxandrolone .
Barrios originally finished 4th in the 2012 Summer Olympics , but she moved up a position after Darya Pishchalnikova was disqualified for testing positive for the anabolic steroid oxandrolone .