Career
She set her personal best (5061) in the women"s 400 metres event on 6 September 1994 in Madrid. Duporty had success as a young athlete at the Central American and Caribbean Junior Championships, where she was runner-up in the women"s 200 m behind Revoli Campbell in 1990. She began competing at the top level of athletics in 1991: after winning a silver medal with the Cuban 4x400 metres women"s relay team at the 1991 Pan American Games, she competed at the 1991 World Championships in Athletics.
She made her first Olympic appearance at the 1992 Barcelona Olympics in the relay, but the team was disqualified in the event.
She stepped up a distance at the 1993 Central American and Caribbean Games, winning the gold medal over 400 metres as well as the 400 m relay title with Cuba. She helped the Cuban team to sixth place again at the 1993 World Championships in Athletics, this time setting a Cuban record of 42.89 seconds.
She was a semi-finalist in the 400 m at the 1995 World Championships in Athletics, but it was at the 1995 Pan American Games where she excelled, winning the 400 m individual and relay titles as well as coming fourth in the 200 m. She took part in her second Olympic relay at the 1996 Summer Olympics and helped the Cuban team to sixth place in the 4×400 m final.
She regained her 400 m and relay titles at the 1997 CAC Championships.
In the final years of her international career, she was confined to the relay races at the major championships. In her third and final Olympic appearance she finished eighth in the women"s 400 m relay.