Education
He competed at the 1952, 1956, 1960, 1964, and 1968 Olympics and finished in 18th, 2nd, 8th, 4th and 7th place, respectively.
He competed at the 1952, 1956, 1960, 1964, and 1968 Olympics and finished in 18th, 2nd, 8th, 4th and 7th place, respectively.
He was awarded the Officer"s Cross of the Order of Polonia Restituta and later the Knight"s Cross. In October 1953, Sidło set a new European record at 80.15 m in Jena, and in June 1956, he set a world record at the 83.66 m in Milan. He went to the 1956 Summer Olympics as a favourite, and was equipped with a modern javelin made of steel, while most of his competitors still used wooden ones.