Mezue ahịrịokwu na-esonụ: N'afọ 1925 Sipilä mebiri ihe ndekọ ụwa n'ebe dị anya nke 20,000 mita, na-agba ọsọ 1:06:29.0 na Stockholm ma mebie ndekọ Ville Kyrönen nke 1:07:07.2 site n'afọ gara aga. Na 1928 Summer Olympics Sipilä nọchitere anya Finland na
marathon, mana ọ bụ naanị onye nke iri na ise; otu ọnwa mgbe asọmpi Olimpik gasịrị, o mebiri ihe ndekọ ụwa maka mita 30,000 na Tampere, na-agba ọsọ 1: 43: 07.8. N'otu ọsọ ahụ, Martti Marttelin mebiri ihe ndekọ ụwa 25,000 m dị ka nkewa.