American athlete Dalilah Muhammad, the Russian Pechonkina has been holding since 2003, the women's 400-meter hurdles world record has become the new owner.
US athlete Dalilah Muhammad broke the world record for women 400 meters hurdles.
Olympic champion Dalilah Muhammad made history in the US Athletics Championships held in Des Moines with a 52.20 second rating.
29-year-old athlete, Russian Yuliya Pechonkina'nın (52.34 seconds) since August 8, 2003, women who can not be broken 400-meter disabled world record.
