lück was born heidi pfeifer in strokele/zwittau in bohemia–moravia (present day czech republic), she is a roman catholic. at the age of 2, she was involved in the turmoil and absolute chaos surrounding the end of ww2. as a result of the beneš decrees heidi's parents had their property expropriated and heidi, together with her mother (anna pfeifer) and her 3 brothers and sisters (herbert, helma and horst), were resettled in allmendingen in baden-württemberg after being expelled from their hometown of zwittau in bohemia (now svitavy, czech republic). heidi later graduated from school and was trained as a retail saleswoman. always very involved in sport, heidi became, at 18, the then youngest member of the board (kreisjugendturnwart) of the ehingen sports district in baden-württemberg, with responsibility for young people.