The following seasons switched channels inside the ProSiebenSat.1 network, season two and three airing on kabel eins and since season four on Sat.1. Oléna "Lena" Serhíyivna Ovchýnnikova is a Ukrainian kickboxer and mixed martial artist who competes in the featherweight division in kickboxing and the flyweight division in MMA. Lim Su-Jeong is a South Korean female Muay Thai kickboxer. Ania Fucz is a German female kickboxer and mixed martial artist of Polish descent, based in Würselen, Germany. She competes professionally since 2004 and is a former Southern Thailand Middleweight and South Korea Muay Thai Bantamweight Champion. Christine Anna Maria Theiss, maiden name Hennig, born February 22, 1980 in Greiz, Germany, is a German female kickboxer. She competes professionally since 2005 and is the current ISKA Welterweight champion and mixed martial artist. The German version of The Biggest Loser started in 2009 on ProSieben.
Since 2007, she is the world champion in professional full contact kickboxing in the World Kickboxing Association.