US star Sydney McLaughlin breaks her own 400 hurdles world record.

Sydney McLaughlin, the current Olympic gold medallist in the 400-meter hurdles, smashed her own world record for the third time this year.

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[{"selector":"#anim-861a3e63-d872-4985-ad79-4da3eb1c8a0b [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(34.179687404002955%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-f6302a2d-1ddf-448c-aa7f-6e0503a1775d","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] The 2-year-old took three-quarters of a second from his previous world record of 51.41 on Friday at Hayward Field in Eugene, Oregon.

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[{"selector":"#anim-5e437c16-317e-4736-b7aa-5dfeb7687abd [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(-41.395970358084234%, 0, 0)","translate3d(0%, 0, 0)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.3,0,.55,1)","fill":"both"}] [{"selector":"#anim-5b1326ad-eec6-4aab-bf0c-0e4e57228ccb","keyframes":{"opacity":[0,1]},"delay":0,"duration":600,"easing":"cubic-bezier(0.4, 0.4, 0.0, 1)","fill":"both"}] Additionally, she smashed the record four times in a 13-month period in a sport where world records frequently remain for decades.

[{"selector":"#anim-132f0abe-37c7-4d30-aa9a-678afe4bc7f4 [data-leaf-element=\"true\"]","keyframes":{"transform":["translate3d(34.179687404002955%, 0, 0) translate(25%, 0%) scale(1.5)","translate3d(0%, 0, 0) translate(0%, 0%) scale(1)"]},"delay":0,"duration":2000,"easing":"cubic-bezier(.14,.34,.47,.9)","fill":"forwards"}] [{"selector":"#anim-08df87d5-e863-4ffa-8d0c-e8146876f9d1","keyframes":{"transform":["translate3d(129.23076%, 0px, 0)","translate3d(0px, 0px, 0)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .8, 1)","fill":"both"}] [{"selector":"#anim-e8c29cd4-b03c-4a00-a0d5-4f3328ed7e01","keyframes":{"transform":["rotateZ(180deg)","rotateZ(0deg)"]},"delay":0,"duration":1000,"easing":"cubic-bezier(.2, 0, .5, 1)","fill":"forwards"}] "The timing is just great and the game is going faster and faster." "Determining only what obstacles can be overcome. From here, I just go faster."