German athlete who set several middle-distance running records between 1927 and 1930. Her victory in the 800-metre race at the 1928 Olympic Games—the first Olympics to include women's athletics—set a world record that was not broken for 16 years.

Distance running had been considered too exhausting for women athletes until the 1920s; the 800-metre run was one of the events in the first international women's track meet in 1921. Radke set a world record in the 800-metre event to win the German championship in 1927 and improved upon that time in a race for the South German championship the next year. At the 1928 Olympic Games in Amsterdam, Radke closed with a burst of speed to win the gold medal, setting a world-record time of 2 minutes 16.8 seconds. Several runners collapsed at the end of the race. Although male athletes also often fainted after races, the International Olympic Committee concluded that the 800-metre run was too difficult for women and dropped it from Olympic Games until 1960. Radke's final individual world record came in 1930, when she ran the 1,000 metres in 3 minutes 6.6 seconds.