Just 9% IAAF criteria for world record eligibility recently as 1958 has not happened since the 1950s marathon World Record marathon records has not happened since the 1950s marathon World Record has not happened since the 1950s has not happened since the 1950s marathon World Record Source marathon World Record http://en.wikipedia.org/wiki/M...rogression running a marathon Marathon world record progression Just 9% English marathon world record wikipedia has not happened since the 1950s marathon world record More info recently as 1958 has not happened since the 1950s marathon World Record 12 records since 1980 world record for the marathon marathon World Record More info marathon World Record marathon World Record English 12 records since 1980