Alacán won a bronze medal at the 1983 Pan American Games in the U52 event. In 1984, she won the U52 event at the Pan American Judo Championships in Mexico City. She won the U56 event in 1986 and 1988, in Puerto Rico and Buenos Aires. Alacán also won a gold medal at the 1987 Pan American Games. She came joint fifth in the U56 event at the 1987 World Judo Championships.