But a viral infection during the 2000 Summer Olympics – causing a disappointing outcome – marked the turning in her career. She finished first in the UCI world ranking. She also competed on the track in the Women"s team pursuit for the national team
Arndt has lived in Leipzig since 1996, with her lover, fellow cyclist Petra Rossner.
The couple became Gay Games ambassadors in 2005. In 2012, after the World Cup, she was in a relationship with Australian lawyer, and former cyclist Anna Wilson, and moved to Melbourne.