Dee ihe na-aga n'ihu maka paragraf a - Tupu ọrụ ndọrọ ndọrọ ọchịchị ya Leskinen bụ onye na-egwu mmiri na-aga nke ọma na mkpakọrịta Helsinki Workers' Swimmers. O meriri n'asọmpi 200 na 400 mita breaststroke na 1937 Workers' Olympiad na Antwerp. Leskinen mechara bụrụ odeakwụkwọ ukwu nke Finnish Workers 'Sports Federation 1940-1943 na onye isi oche 1951-1955. Leskinen lụrụ ọgụ n'oge oyi
na Agha Ndị Na-aga n'ihu. E merụrụ ya ahụ́ n'afọ 1941. Ọkwá ya n'usuu ndị agha bụ Major.