Heidecke joined the women's team of the athletic ball game club founded in 1977 in the municipality of Wesseln in the district of Dithmarschen in Schleswig-Holstein.[3]
In the course of her goalkeeping career, she made several appearances in the selection team of the Schleswig-Holstein Football Association. She even made her debut in the senior national team. In her only international match on November 21, 1984, in Waalwijk in a 1–1 draw in a friendly against the national team of the Netherlands, she came on as a substitute in the second half for Marion Isbert when the score was 0–1.