Ana represented her country in the 2000 olympic games in sydney and won a gold medal in the pan-american games in santo domingo in 2000. In 2003, she also won the world track championship in paris l, france,making her the world champion in the 400 meters. In the 2004 olympic games in athens, the whole of mexsico stopped for one minute watch ana run the 400-metet race, where she won the silver medal.