|International University Games|
|1937 Paris||Javelin throw|
|1939 Vienna||Javelin throw|
Friedrich Issak (20 November 1915 – 11 May 1991) was an Estonian sportsman and journalist. As a javelin thrower, he won gold and bronze medals at the International University Games and was national champion of Estonia and later the Soviet Union. In addition, he played basketball and volleyball, winning national championship medals in both. He later became editor-in-chief of the culture magazine Kultuur ja Elu.
At the 1937 International University Games in Paris Issak won gold in the javelin with a throw of 70.25 m, a meeting record that was only broken twenty years later. His best throw that year, 70.56 m, placed him sixth on the annual world list. Issak placed fifth at the 1938 European Championships, also in Paris, and recorded his personal best (72.07 m) in Tartu in July 1939. At that year's International University Games in Vienna he won the bronze medal with 66.79 m.
He was Estonian champion in the javelin in 1940, 1946 and 1947 and Soviet champion in 1943, 1944 and 1947. Additionally, he was Estonian basketball champion three times from 1938 to 1940 with Tartu EASK. He also won national championship medals in volleyball.
During World War II Issak served in the Red Army and the destruction battalions. In 1944 he became editor of the sports magazine Kehakultuur, a post he held until 1951. From 1958 to 1978 he worked for the culture magazine Kultuur ja Elu, eventually becoming its editor-in-chief. His memoir Nood rohtunud rajad was published in 1988.
- "Issak, Friedrich". Eesti spordi biograafiline leksikon (in Estonian). Retrieved 18 April 2014.
- "WORLD STUDENT GAMES (PRE-UNIVERSIADE)". Athletics Weekly. Retrieved 18 April 2014.
- "Friedrich Issak". Retrieved 18 April 2014.
- "All-Time List As At 31 December 1945" (PDF). Association of Track and Field Statisticians. Archived from the original (pdf) on 18 April 2014. Retrieved 18 April 2014.
- Walter, Hannes. "Must lehekülg Eesti rahva ajalooraamatus". Postimees. Archived from the original on 3 August 2007. Retrieved 18 April 2014.