Career
She has represented Germany internationally at the European Athletics Indoor Championships and at the 2009 World Championships in Athletics. Her personal best of 14.57 metres outdoors and 14.47 m indoors are the German records for the event. Born in Schmölln, she began competing in the event as a teenager, representing the TuS Jena club
Her first international appearance came at the 2000 World Junior Championships in Athletics, where she jumping in the qualifying rounds.
She returned to the competition for the 2002 edition and reached the final, placing seventh overall. A quiet 2006 season for her was highlighted by an outdoor best jump of 13.96 m.
She cleared the fourteen-metre mark for the first time the following year and claimed the national title both outdoors and indoors. She made three international appearances in 2009: she jumped in the triple jump qualifiers at the 2009 European Athletics Indoor Championships, was eleventh at the 2009 European Team Championships, and then represented Germany for the first time at world senior level, taking part in the heats at the 2009 World Championships in Athletics in Berlin.
She jumped for her country at the 2010 European Athletics Championships, but failed to record a mark in the triple jump qualifiers.
Demut hit a new career high in 2011: she broke Petra Laux-Lobinger"s German indoor record in Chemnitz with a clearance of 14.45 m and took it two centimetres further at the Social Democratic Party Bank Meeting. She entered the 2011 European Athletics Indoor Championships as the athlete with the leading indoor mark of the season, but failed to match her previous form and was eliminated in the heats stage with a best jump of 13.81 m from her series. Demut set a new best outdoors as well, jumping 14.57 m in Wesel in June to improve the German outdoor record by eleven centimetres – this bettered Helga Radtke"s mark which had stood for almost seventeen years.
She was set to be a contender at the 2011 World Championships in Athletics, but a heel injury four days before the competition forced her to withdraw and bring her season to a close.
