Ka cika wannan jumla: Ta fara shekara ta 2010 da cin nasara a Lisbon Half Marathon, ta gama da lokaci na 1:08:38. Ta inganta mafi kyawunta a Lille Half Marathon a watan Satumba, tana gudu 1:07:48, amma Florence Kiplagat ta doke ta zuwa layin gamawa. An zabi Arusei don
2010 IAAF World Half Marathon Championships a sakamakon haka kuma ta sami lambar tagulla, ta kafa ƙungiyar nasara ta Kenya tare da Kiplagat da Joyce Chepkirui. Lokacinta na 2011 ya bayyana a Rabin Marathon na Paris kuma ya kafa rikodin lokaci don lashe tseren. Ta fara fitowa a kan nesa, ta jagoranci a Marathon na Vienna City na farkon kilomita 30. Koyaya, ta rage gudu a cikin zafin kuma ta ƙare a matsayi na uku tare da lokacin awa 2:27:17. A Marathon na Amsterdam, tana cikin shugabannin tseren tseren amma duk da haka ta sake komawa baya a rabi na biyu, ta kammala tseren a matsayi na shida.