Just prior to entering major competitions, Liashchuk made a name for herself by attempting several world records. In 2014, Olga broke the
Guinness World Record for the fastest time to crush 3 watermelons between the thighs, with a time of 14.65 seconds and with her friend
Lidiia Hunko, broke the double
Deadlift women's world record with . With the new found fame, she entered mainstream strongwoman competitions and won 2014
World's Strongest Woman competition held in
Pyhtää,
Finland. Liashchuk entered the 2016 Arnold Amateur Strongwoman World Championships in
Columbus, Ohio and emerged third. Taking part in more mainstream strongwoman competitions in ensuing years, Liashchuk won the 2017 Strongest Woman in the World competition in
Las Vegas,
Nevada In 2018, Liashchuk also managed to renew her watermelon crushing world record with a time of 7.59 seconds. In 2021 Liashchuk broke another Guinness World Record by carrying 3 people weighing a total of across the stage during 2021 Ukraine's Got Talent. The following year she won her second World's Strongest Woman title in
Daytona Beach,
Florida. In 2023 she won the Shaw Classic Women's Open title and in 2024 and 2025, won
America's Strongest Woman title back to back. In 2026 she won the Arnold Strongwoman Classic title for the third time, becoming the first and only woman in history to do so. In 23 international strongwoman competitions, Liashchuk has won nine titles, making her the most decorated professional strongwoman of all-time. ==Personal life==