Kammala jumla mai zuwa: Larsen ya zama zakaran Danish na 5,000 da 10,000m a 1937, yana samun taken farko na Helsingør IF. Ya ci gaba da kama wasu gasar zakarun kasa guda goma, tara a cikin marathon (1941, 1943<unk>1950) da daya a cikin kilomita 20 (1950), tare da zuwa na uku a tseren mita 10,000 a 1938. A shekara ta 1946 ya kafa tarihin kasa na Danish don marathon a 2:38:36 kuma ya yi gasa a gasar zakarun Turai na wannan shekarar, inda ya zama na takwas a cikin marathon. Babban tasharsa na kasa da kasa na gaba shi ne Wasannin Olympics na 1948, inda ya zo na goma a cikin 'yan wasa 41 a gasar Olympics ta 1948.
wannan taron.