 Kọkọ parí gbólóhùn yìí: : 2005 European Athletics Junior Championships in Kaunas Lithuania Horna parí ni 8th ibi ti awọn 800m ije. O ti yọkuro ni idaji ikẹhin ti 2006 World Junior Championships ni Athletics ni Beijing, ati ni igbona akọkọ ti 2009 European Athletics Junior Championships ni Kaunas, ni awọn akoko mejeeji lori ijinna 800m. Ni ọdun 2009 o gba ami ẹyẹ orilẹ-ede akọkọ rẹ lakoko Awọn Ajumọṣe Ajumọṣe Ajumọṣe ti Ilu Jamani. Ó gba àmì ẹyẹ fàdákà ní ìdíje ìdíje ìdíje Ni ọdun 2013 Horna gba ami ẹyẹ lori ijinna 1500m ni German Indoor Athletics Championships, o si daabobo ami ẹyẹ rẹ ni ọdun 2014. 