See Kennedy march for the 50-mile walk started a fitness challenge.

Athletes must always keep in contact with the ground and the supporting leg must remain straight until the raised leg passes it.

[2][3][4][5] In 1966, Israeli Shaul Ladany broke United States record in the 50-mile walk, which had stood since 1878 and was at the time the oldest U.S. track record.

[6] The men's world best for the 50-mile race walk is held by Ladany, through his race of 7:23:50[a] in 1972 in New Jersey, shattering the world mark that had stood since 1935.

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