[1] Elso is tied with Teresa Fuster, Marta Baldó and Estela Giménez for the Spanish rhythmic gymnast with the most medals in World Championships, with a total of 8.

In 1988, she was invited by Emilia Boneva to join the national rhythmic gymnastics team of Spain as part of the group, which she would be a member of until 1992.

Shortly after, she and the other members of the group (Beatriz Barral, Bito Fuster, Arancha Marty, Mari Carmen Moreno and Vanesa Muñiz, with Marta Aberturas and Nuria Arias as the substitutes) won three bronze medals at the World Championships in Sarajevo.

[4][5] At the World Cup Final, held that year in Brussels, the group (made up of Elso, Beatriz Barral, Bito Fuster, Montse Martín, Arancha Marty and Vanesa Muñiz, with Marta Aberturas and Gemma Royo as the substitutes) won all three bronze medals.

Their ribbon exercise used "Tango Jalousie", composed by Jacob Gade, for the music, while their mixed-apparatus one used the song "Campanas" by Víctor Bombi.

[9] Before the World Championships, they won gold at the Karlsruhe tournament (ahead of the USSR and Bulgaria) and three bronzes at the Gymnastic Masters in Stuttgart.

[10] On 12 October 1991, the Spanish team (consisting of Elso, Débora Alonso, Isabel Gómez Pérez, Bito Fuster, Montse Martín and Gemma Royo, with Marta Aberturas and Cristina Chapuli as the substitutes) won gold in the all-around at the World Championships in Athens.

They were kept on the team as substitutes, but in the competing lineup were replaced by Alicia Martín, Cristina Martínez and Bárbara Plaza.

[26] After Boneva's death on 20 September 2019, Lorea and other former national gymnasts gathered to pay tribute to her during the Euskalgym held on 16 November 2019.