Ryan Young for The New York Times
DOHA, Qatar — She should have been thrilled.
That was what everyone expected in July when Dalilah Muhammad broke a world record that had stood for 16 years. But in the moments after Muhammad crossed the line in the women’s 400-meter hurdles at the U.S.A. Track & Field Outdoor Championships, she barely celebrated.
She smiled as the video board flashed her time, then she clasped her hands, hugged a couple of her competitors and waved to the crowd. The record had stood since 2003, and Muhammad had been chasing it since she won a gold medal at the 2016 Summer Olympics.