Education
Stockholm University.
Member of the Riksdag athletics competitor
Stockholm University.
From 1948 to 1952 he represented the Liberal People"s Party in the second chamber of the Riksdag. In all these years the two-handed format was used: the javelin was separately thrown with the right hand and the left hand, with the best results for both hands added together. In 1917 he broke Urho Peltonen"s world record for this event, totalling 114.28 and throwing 61.81 with his better hand.
As throwing the javelin with both hands soon became a rarity, Häckner"s world record has never been officially broken.
Häckner was a lawyer by profession, and had his own law firm in Stockholm between 1937 and 1966. He also participated in politics, supporting the Liberal People"s Party (Folkpartiet).
He represented the Liberal People"s Party in the second chamber of the Swedish Parliament (Riksdag) from 1948 to 1952.
He opposed Nazism and advocated boycotting the 1936 Summer Olympics in Berlin.