1998–1999

Zamolodchikova began age-eligible for senior competition in 1998. She won a silver medal with the Russian team at the 1998 European Championships.^[5] Individually, she finished fourth on vault.^[7] At the 1998 World Youth Games in Moscow, she won the all-around title.^[8]

In 1999, Zamolodchikova participated in her first World Championships. She won the gold on the vault, silver with the Russian team, and bronze in the all-around. Following the World Championships, she competed at the Glasgow Grand Prix and won the gold medal on the vault.^[9] She won another gold medal on vault at the Stuttgart Grand Prix.^[10]

2000

Zamolodchikova began the Olympic season at the Montreux World Cup where she won the gold medal on the vault.^[11] Despite her father's recent death, she chose to still compete at the European Championships.^[4] There, she led her team to the gold medal and earned individual silvers in the all-around and vault finals and a bronze on the balance beam.^[12][13][14]

2001

Zamolodchikova won the all-around title at the 2001 American Cup.^[22] Then at the Paris World Cup, she won gold on vault and floor exerciser and silver on balance beam behind Sun Xiaojiao.^[23] She won another vault gold medal at the Cottbus World Cup in addition to a silver on uneven bars behind teammate Svetlana Khorkina.^[24] She was a member of the Russian team that won gold at the European Team Championships.^[25] At the 2001 Goodwill Games, she won the all-around bronze medal behind Sabina Cojocar and Svetlana Khorkina.^[26] In the event finals, she won gold on both vault and floor exercise.^[27] She injured her foot during the qualification round of the World Championships, but she still received the silver medal the Russian team won.^[2][28] Despite the injury, she competed at the Stuttgart World Cup and won the gold medal on vault.^[29]

2002

Zamolodchikova won a gold medal on vault and a bronze medal on uneven bars at the Glasgow World Cup.^[30] Then at the Paris World Cup, she won silver on uneven bars and bronze on vault.^[31] She was a member of the Russian team that won gold at the European Championships, and she finished fourth in the vault final.^[32] She won the gold medal on vault at the World Championships.^[33] At the 2002 World Cup Final, she tied for the gold medal on vault with Oksana Chusovitina, and she won silver on balance beam behind Sun Xiaojiao.^[34][35]

2003

Zamolodchikova withdrew from the American Cup after falling and injuring her leg on the uneven bars.^[36] She returned to competition at the Paris World Cup and won a bronze medal on the vault.^[37] She then won gold on vault at the Glasgow World Cup and a silver on balance beam, and she won another gold on vault at the Stuttgart World Cup.^[38][39] At the World Championships, the Russian team only finished sixth, but Zamolodchikova won the silver medal on vault.^[40]

2004

Zamolodchikova won a bronze medal with the Russian team at the European Championships. Individually, she won a bronze medal in the all-around and tied with teammate Anna Pavlova for the silver medal on vault.^[41] She was then selected to represent Russia at the 2004 Summer Olympics alongside Pavlova, Ludmila Ezhova, Svetlana Khorkina, Maria Kryuchkova, and Natalia Ziganshina. The team won the bronze medal, and Zamolodchikova finished fourth in the vault final.^[42][43]

After the Olympic Games, she won a gold medal on the vault at the Glasgow World Cup.^[44] She then won a silver medal on vault at the Stuttgart World Cup behind Pavlova.^[45] Then at the World Cup Final, she finished fourth on vault and eighth on floor exercise.^[46]

2005–2006

At the 2005 European Championships, Zamolodchikova qualified for the vault and floor exercise finals where she finished fifth and eighth, respectively.^[47] She was a part of the Russian team that won the bronze medal at the 2005 Summer Universiade.^[1] Then at the 2005 World Championships in Melbourne, she placed fourth in both vault and floor finals.^[4]

Zamolodchikova finished in last place at the 2006 American Cup after falling off the uneven bars.^[48] At the 2006 World Championships, she helped the Russian team to a bronze medal in the team event, their first at the World level since 2001, and qualified for the vault finals where she was fourth.^[49] After the World Championships, she won a bronze medal on the vault in the Stuttgart World Cup and two silver medals on the vault and floor exercise in the Glasgow World Cup.^[50][51] She finished her year with a bronze on the vault at the World Cup Finals in São Paulo, Brazil.^[34]

2007–2009

Zamolodchikova missed the 2007 European Championships due to a leg injury.^[4] She competed at the 2007 Summer Universiade and won bronze medals with the Russian team and on the floor exercise.^[1] At the 2007 World Championships, her teammate Ekaterina Kramarenko ran up and touched the vaulting table but stopped and received a 0. Zamolodchikova performed a solid vault, but the Russian team had already ended up eighth.^[52] In the event finals, she fell on her second vault and finished again in eighth.^[53]

Zamolodchikova continued training in 2008 in hopes of making the Russian Olympic team for the third time, but a back injury prevented her from making the team.^[54] After the Olympics, she competed at the 2008 World Cup Final and finished sixth on the vault and fourth on the floor exercise.^[55]

Zamolodchikova made her last competitive appearance at the 2009 Summer Universiade in Belgrade where she helped the Russian team win the silver medal.^[2]