Records Ratified-Athletics: Muhammad & Brittany Hurdles Records Dalilah Muhammad’s world 400m hurdles record of 52.20 and Brittany Anderson’s world U20 100m hurdles records of 12.79 and 12.71 have been ratified. Muhammad, the Olympic champion, broke the 400m hurdles world record at the US Championships in Des Moines on 28 July, taking 0.14 off the previous … Continue reading Records Ratified-Athletics: Muhammad & Brittany Hurdles Records