Kuzmina represented Slovakia from December 2008 and won the silver medal two months later in mass start at the 2009 Biathlon World Championships in Pyeongchang.

Kuzmina's victory made her the second Slovak after Ondrej Nepela to win a Winter Olympic gold medal, and the first for independent Slovakia.

[8] She also finished the season second in the overall World Cup standings, three points behind champion Kaisa Mäkäräinen.

Her husband, Daniel Kuzmin, is an Israeli cross-country skier and Kuzmina's personal coach.

After almost 5 years into her retirement from competitive biathlon, Kuzmina decided to compete at the 2024 IBU Open European Championships in Osrblie where she finished 59th in sprint.