She twice won the gold medal at the Summer Universiade during her career. Guzowska set her personal best (4459 points) in the pentathlon in 1980. Her best of 6616 points in the heptathlon remained the Polish national record for the event until 2022.[1]
At national level, she won five straight heptathlon titles from 1980 to 1984 and also won the 100 metres hurdles title in 1986.[2] At the indoor Polish championships, she was a four-time pentathlon champion as well as having a shot put title and two wins in the 60 metres hurdles.[3]