[2] In 1949, Müller won the East German Championships in women's pair skating with partner Irene Salzmann.

She studied at the Deutsche Hochschule für Körperkultur in Leipzig, and in 1955 she began coaching figure skating.

She also coached, among men, Günter Zöller, Jan Hoffmann, Nils Köpp, Rico Krahnert and Ronny Winkler; and, among women, Sonja Morgenstern, Anett Pötzsch, Katarina Witt, Evelyn Großmann, Martina Clausner, Marion Weber, Constanze Gensel and Simone Lang.

Altogether, her students won three Olympic gold medals and ten world championship titles.

In comparison, Carlo Fassi's students won four Olympic gold medals and eight world championship titles.