Rischer first competed at the 1973 World Championships finishing 21st in the all-around. In 1975, The absence of rhythmic gymnasts from the Soviet Union, Bulgaria and East Germany. Western German athletes at the time, the highest ranked athletes remaining in contention meant Rischer and teammate Christiana Rosenberg competing at the 1975 World Championships in Madrid, Spain. Rischer went on to win the All-around title ahead of teammate Rosenberg, she also won the gold medal in Hoop and Ribbon and a silver medal for clubs. She competed in her last Worlds at the 1977 World Championships finishing 6th in all-around, she won silver in ribbon and placed 6th in ball.