[1] Graduated at Pontifícia Universidade Católica do Rio Grande do Sul with a degree in advertising, Lenhardt moved in 2004 to Santos city, where she began training in order to participate of the Olympics.

[2] Nicknamed Mischa by friends, she was removed from the Brazilian team 2007 Pan American Games[2] due to the federation's error that signed three athletes to compete in the relay instead of allowed two.

Lenhardt represented Brazil at the 2008 Summer Olympics in Beijing, where she competed for the women's 4×100-metre freestyle relay, along with her fellow swimmers Flávia Cazziolato, Tatiana Barbosa, and Monique Ferreira.

[6] In this relay, she broke the short-course South American record, with a time of 3:35.95, along with Tatiana Lemos, Flavia Delaroli and Julyana Kury[7] She also got the 26th place in the 50-metre freestyle.

[9] She won Brazil's fourth silver medal for the 4×100-metre freestyle relay team at the 2011 Pan American Games in Guadalajara, Mexico.