In 1991 she once again reached the semi final of an international 200 metres competition, but now at the World Indoor Championships (24.70 seconds). She also ran 7.48 in the 60 metres, competing in the heats. At the World Championships she made her international debut in the 400 metres, placing 16th overall after exiting the semi finals with a time of 53.63 seconds. The semi final was the third round (as opposite of the second round), and she actually ran faster in the first round, with 52.84 seconds. Olsen also helped running the 4 × 400 metres relay in 3:32.76 minutes. The Universiade of 1991 became a great success, as she won the 100 metres bronze medal in 11.61 seconds and the 200 metres silver medal in 23.41 seconds.