Education
She competed at the 2012 Summer Olympics and finished in ninth place with the German team At the 2011 European Championships, Seitz finished second in the all-around behind Anna Dementyeva with a score of 56.700. She finished 5th in the vault final with a score of 14.187.
She finished 5th in the uneven bars final with a score of 14.175.
Career
Individually she was sixth on uneven bars and tenth all-around. She was the silver medalist in the all-around competition at the 2011 European Artistic Gymnastics Championships. She has an uneven bars element named after her, a twisting transition from the low to high Barometer
2011
At the 2011 Switzerland-Germany-Romania Friendly, Seitz contributed scores on vault, bars, and beam towards Germany"s second-place finish.
At the 2011 World Championships, Seitz contributed scores on all four apparatus towards Germany"s sixth-place finish in the team final. In the individual all-around she finished eleventh with a score of 55.823.
2012
= 2012 Olympics Germany finished ninth in the team qualification round, so they did not qualify into the final. They were only 0.365 behind Canada.
However Seitz qualified twelfth into the all-around final, and eighth into the uneven bars final.
In the individual all-around final, Seitz finished 10th with a score of 57.365. In the uneven bars final, Seitz finished in sixth with a score of 15.266. In December 2012 she competed at the 2012 World Cup event in Stuttgart and placed second with a total score of 55.566.
A week later she competed in Glasgow and again took silver, this time with a score of 54.799.
2013–2014
After the Olympic season she competed at the 2013 American Cup and the 2013 World Championships, even though she was not fully prepared due to her studies. She continued competing through the 2014 season.
Her World Championship chances were questioned due to injuries, but she made the team However, she competed only on bars where she had a fall.
She later competed at the 2014 Arthur Gander Memorial, finally putting together solid routines and snatched the bronze, behind the silver medalist Larisa Iordache and the gold medalist Daria Spiridonova.
2015
Seitz was selected to competed at the 2015 European Games with Sophie Scheder and Leah Griesser. Seitz showed her best result in All-Around Final with a score of 55.765 at 2015 World Artistic Gymnastics Championships which led her to be ranked as 10th. As a team, they placed 12th.