[1] She represented Bolivia in three editions of the Olympic Games (1996, 2000, and 2004), and has captured nine consecutive titles in both 10 and 20 km race walk at the South American Championships since her sporting debut in 1996.

[4] At the 2000 Summer Olympics in Sydney, Irusta came from behind the pack through the halfway mark to take the forty-second spot in the inaugural 20 km race walk at a personal best of 1:43.34.

[3] She surpassed Ukraine's Vira Zozulya and held off United States' Teresa Vaill by a ten-second edge on the final lap to cross the finish line with a forty-first place time in 1:38:36.

[6][7] Building her own milestone as a three-time Olympian, Irusta was also appointed by the National Olympic Committee (Spanish: Comité Olímpico Boliviano) to carry the Bolivian flag in the opening ceremony.

[8] At the 2007 Pan American Games in Rio de Janeiro, Irusta almost claimed a silver medal in a tight finish against El Salvador's Cristina López in the same program, but was disqualified by the officials for lifting a third time at the final lap.