In 1986, she joined Spain's national junior rhythmic gymnastics team, where she was coached by Rosa Menor, Cathy Xaudaró and Berta Veiga.

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

[5][6] In the World Cup Final, held that year in Brussels, the group (made up of Marty, Beatriz Barral, Bito Fuster, Montse Martín, Lorea Elso and Vanesa Muñiz, with Marta Aberturas and Gemma Royo as the substitutes) won all three bronze medals.

More recently, she has worked as the rhythmic gymnastics coordinator at the San José del Parque School in Madrid.

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