Career
She has a personal best of 6430 points for the event. She began competing in heptathlon competitions from a young age. She also made her senior international debut at the 2007 European Athletics Indoor Championships, where she came ninth in the women"s pentathlon.
Mächtig represented Germany at the World Championships in Athletics in 2009, 2011 and 2013.
She placed ninth with 6265 points on her debut outing, but was less successful in 2011 with her 17th-place finish. In 2013, she improved her personal best at the Ratingen meet.