Tormena started cycling at the age of 4. Although he had also tried road cycling, he focused on mountain biking and initially devoted himself mainly to cross-country Olympic (XCO). In 2015 he completed his first races in the Cross-Country Eliminator (XCE) at the Italian Championships.

Tormena began her international career in 2019 at the age of 17 and took first place in her first World Cup race in the Eliminator. In her debut season, she won three stages and the overall ranking of the UCI Mountain Bike World Cup Eliminator, and became World Champion, European Champion and Italian National Champion, becoming the best athlete in the world in the 2019 Eliminator.

World Champion in 2021, 2022, 2023, 2024, with many victories in the World Cup. It should be noted that in 2018 she became Italian champion of MTB Enduro and in 2019 of winter triathlon. In 2022 she graduated again as Italian Champion MTB Enduro.