Pedzisa mutsara unotevera: Burkart akarasikirwa nomukana wokumhanya paOlympics yeSeoul ya1988 nemhaka yokukuvara, asi akadzokazve aine nguva yakanakisisa yomunhu oga yemasekondi 10.39 muna 1989. Gore rimwe chetero akakunda 100 m "B" chikamu chokupedzisira pa
Mukombe weEurope wa1989. Akamirira Switzerland pa 1990 European Athletics Indoor Championships uye 1990 European Athletics Championships uye akarova imwe zana kubva pa100 m yakanakisisa gore iroro. Akatadza kubuda mumakwikwi emamita makumi matanhatu pa 1992 European Athletics Indoor Championships asi aive nemwaka wakanakisa wekunze pabasa rake, achiisa 100 m yakanakisa uye rekodhi yenyika yeSwitzerland yemasekondi 10.32 pamwe ne200 metres yakanakisa yemasekondi 20.76. Ikoku kwakamuwanira kutanga kwake kweOlympic pazera ramakore 34 uye akanga ari mutevedzeri wechina mumakwikwi ose ari maviri. Akakwanisa kupinda mumakwikwi eWorld Championships muna 1993 mumutambo weAthletics gore rakatevera, asi haana kutanga nekuda kwekukuvara.