Born in Bol to a modest family, her athletic career began when she participated in 1993 at Moundou to the National Sport Week.
Her victory in the 400 metres opened her the road to the selection for the 1994 World Junior Championships held in Lisbon.
[2] In February 1997, with the help of a grant obtained by the International Olympic Committee, she left Chad for the United States.
[2] In 2000, she moved to Calgary, Alberta, Canada, where she trained under former Canadian Olympic coach John Cannon.
[4] In 2005, Nadjina competed at the 2005 Jeux de la Francophonie in Niamey.