In 1989 she was called up by the Spanish national team to join the junior group, trained by Rosa Menor, Paqui Maneus, Cathy Xaudaró and Berta Veiga.

She participated in the Junior European Championships in Tenerife, winning the bronze medal together to the rest of the team, made up of Carmen Acedo, Noelia Fernández, Ruth Goñi, Eider Mendizábal and Gemma Royo, with Cristina Chapuli and Diana Martín as substitutes.

[6][7][8] At the World Cup Final, held that year in Brussels, the group (made up of Montse, Beatriz Barral, Lorea Elso, Teresa Fuster, 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.

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

In recent years, Montse has alternated her role as a freelance designer, painter and illustrator in plays and musicals, with work as an actress and dancer.

[29] In October 2014, the first two volumes of Olympia, a series of children's stories illustrated in watercolor by Montse and written by former gymnast Almudena Cid that are inspired by the latter's sporting life, were published.

Among them are Anelia Ralenkova, Diliana Gueorguieva, Marta Bobo, Marina Lobach, Oksana Kostina, Ana Bautista, Elena Shamatulskaya, Carmen Acedo, Maria Petrova, Carolina Pascual, Kateryna Serebrianskaya, Olena Vitrichenko, Eva Serrano, Olga Gontar, Almudena Cid, Alina Kabaeva, Anna Bessonova, Yevgeniya Kaneva, Alina Maksymenko, Hanna Rizatdinova, Margarita Mamun and Yana Kudryavtseva.

The presentation was chaired by Montse and Manel Martín, as well as the CSD Sports Director, Jaime González, and Jesús Carballo, president of the Royal Spanish Gymnastics Federation.