She competed for the Unified Team at the 1992 Summer Olympics, in the heats of the relay competition. When the team of Yelena Ruzina, Lyudmila Dzhigalova, Olga Nazarova and Olga Bryzgina won the final, Shmonina was also awarded the gold medal. Shmonina was hailed in Uzbekistan as the first Uzbek athlete to win an Olympic gold medal.
|1989||World Indoor Championships||Budapest, Hungary||5th||400 m|
|European Indoor Championships||The Hague, Netherlands||2nd||400 m|
|1990||European Indoor Championships||Glasgow, Scotland||1st||400 m|
|European Championships||Split, Yugoslavia||7th||400 m|
|Goodwill Games||Seattle, United States||7th||400 m|
|Goodwill Games||Seattle, United States||1st||4 x 400 m relay|
|1991||World Indoor Championships||Seville, Spain||2nd||4 x 400 m relay|