Rubuta ci gaba don wannan sakin layi - Ta lashe lambar zinare a gasar cin kofin Turai ta 2007
kuma ta ci gaba da taken ta a gasar zakarun Turai ta 2007 U23 tare da mafi kyawun gudu na 9:39.40. Ta fara fitowa ta farko a duniya a Poland a Gasar Cin Kofin Duniya ta 2007 a Wasanni a wannan shekarar, inda aka fitar da ita a matakin zagaye na farko. A watan Disamba, ta lashe lambar tagulla ta mutum da ta kungiya a gasar 'yan kasa da shekaru 23 a gasar zakarun Turai ta 2007. Ta wakilci Poland a wasannin Olympics na Beijing na 2008, amma kuma ta kasa ci gaba bayan zafin tseren tsere. Bayan da ta yi rikodin sabon lokaci mafi kyau na 9:26.93 a cikin zafin jiki, Kowalska ya kai wasan karshe na farko na duniya a gasar zakarun duniya ta 2009 kuma ya gama a matsayi na goma sha biyu. An zaɓe ta don yin tsere a gasar IAAF ta Duniya ta 2009 kuma ta gama a takwas.