Kammala wannan jumla: Ta gama goma sha takwas a cikin mita 10,000 a Wasannin Olympics na 2008. Arusei ya yi takara a gasar
2008 IAAF World Half Marathon Championships ta kammala na biyar kuma ta lashe azurfa a matsayin wani ɓangare na ƙungiyar Kenya. Ta yi nasara a Berlin Half Marathon, Berlin 25K, da Dam tot Damloop tseren hanya a wannan shekarar, ta kafa mafi kyawun kilomita 15 a gasar ta ƙarshe.