One year later , she became one of the stars of the German biathlon team with three gold medals in the 2007 Biathlon World Championships in Antholz , Italy . In 2008 , she won three other gold medals in the Biathlon World Cup in Ã -- stersund , Sweden , and reached also the first place of the Biathlon World Cup in that year . One month later , she claimed three gold medals at her first appearance at the Biathlon World Championships .