After practicing ballet, she began rhythmic gymnastics at the Club Cuartel de la Montaña in Madrid.

Although the start of the competition was initially scheduled for 20 November, it had to be delayed due to the death of Francisco Franco.

[6][7][8] After this milestone, in 1976 she received numerous awards, such as the Sunbeam Trophy for the 2nd best Spanish athlete by Mundo Deportivo, or the Joaquín Blume Trophy for the best Spanish athlete under 22 years in the National Sports Awards, which she received from King Juan Carlos I.

Alegre was also national champion in 1976 and 1977 in two championships held in Madrid and Gijón respectively, also making a gold clean sweep in the latter.

[13][14] In May 1977 she returned to the Stoudenska Tribouna Cup in Sofia, where she was 7th in All-Around, won bronze with ribbon and finished 5th in ball, 6th in hoop and 7th in rope.

[16] Although she intended to participate in the European Championships in Madrid in November, she became pregnant during the month of vacation and decided to withdraw.