Career
In 1922 he became the first official world record holder in the decathlon, albeit with a performance inferior to the Stockholm 1912 series of Jim Thorpe. Klumberg took up athletics around 1912, and in 1915-1917 held Russian records in several jumping and throwing events. In 1918-1919 he fought in the Estonian War of Independence as a volunteer, and after that worked as a physical education instructor with the Estonian army (1919-1920), military schools (1924-1926) and police schools (1927 and 1942-1944).
He also trained the national athletics teams of Poland (1927-1932) and Estonia, and in this capacity attended the 1928, 1932 and 1936 Olympics.
He was arrested by People’s Commissariat of Internal Affairs in 1944 and kept in a prison camp in the Soviet Far East until 1956. He is buried at the Rahumäe cemetery in Tallinn.