Pittman won the 400 m hurdles at the 1999 World Youth Championships in Athletics in Bydgoszcz and became treble champion in 200 m, 400 m and 400 m hurdles at the national championships of that year. In 2000, she became the first woman ever to win the 400 m flat and hurdles double at any IAAF or IOC championships – in this case, the 2000 World Junior Championships in Santiago (Chile).