[1] She competed for East Germany in the 1976 Summer Olympics held in Montreal, Quebec, Canada in the 1500 metres where she won the bronze medal.

That year, she set her personal bests of 1:57.06min for the 800 m and 3:59.9min for the 1500 m, but opted to confine only to the 1500 m in Montreal eventually winning the bronze medal behind the winner, Tatyana Kazankina (USSR).

[2] Klapezynski again finished behind Kazankina when winning 1500 m silver at the inaugural World Cup in Düsseldorf next year.

It seemed that her career stagnated after 1500 m fifth place finishes at the 1980 Moscow Olympics and 1982 European Championships in Athens, but Bruns turned to longer distances in the early 1980s, and although she didn't compete at the 1984 Summer Olympics in Los Angeles, due to the Eastern Bloc boycott, she recorded her lifetime best at 3000 m that year, clocking 8:36.38min in July.

During 1985, she lowered her one-mile PB to 4:21.59min at the Weltklasse meet, finishing fourth behind Mary Decker's world record of 4:16.70min.