Gerdes took up the sport at the club Blumenthaler SV. At the 1993 German Gymnastics Championships in Bremen, she was the runner-up behind Magdalena Brzeska in the rope and hoop finals, and she won bronze in the all-around and the clubs and ball finals.[2] In November she was 24th in the all-around at the World Championships in Alicante.[3]
In 1994 she won the German national title with rope. She also won four silver medals with ribbon, clubs and hoops and the all-around.[4] The following year, competing for SV Werder Bremen, she came second with ribbon and rope and again reached third place in the ball and club finals.[2]
In 1992 and 1993 she was Bremen's Sportswoman of the Year. After her retirement in 1998, she embarked on a coaching career at Blumenthaler TV.[5] She was also part of Blumenthaler's gymnastics and dance group, until they had to disband in 2023. She is now married and had a child in 2010.[6]
Germany