Oppelt was born in East Berlin,[1] and competed in the 2004 Summer Olympics in Athens, Greece, in the double sculls, and took home the silver medal along with teammate Peggy Waleska.

At the 2012 Summer Olympics, she was on the German quadruple sculls team that won the silver medal, along with Annekatrin Thiele, Carina Bär and Julia Richter.

[2] In 2008, she was part of the German quadruple sculls team that won the bronze medal at the Beijing Olympics, along with Manuela Lutze, Kathrin Boron and Stephanie Schiller.

In the quadruple sculls, she has also won two world championship silver medals, in 2005 (with Susanne Schmidt, Kathrin Boron and Stephanie Schiller) and 2007 (with Manuela Lutze, Kathrin Boron and Stephanie Schiller), and a bronze in 2010 (with Carina Bär, Tina Manker and Julia Richter).

[6][7][8] She has also won two silvers medals at world level in the double sculls, in 2003 (with Kathrin Boron) and 2006 (with Susanne Schmidt).