Atkinson clocked 29.05 seconds on Dec. 12, a day after celebrating her 30th birthday. The time was just outside her own world record of 28.56.
“I am happy to finally get the gold in the 50m,” Atkinson said.
“There (are) a lot of stereotypes about age and I just turned 30 so it’s really cool to see the 30-year-olds still able to do it.”
Atkinson also defeated arch rival Ruta Meiluyte of Lithuania, who won silver. Italy’s Martina Carraro earned bronze.
It was Atkinson’s first gold medal in the event at the world championship. She won three silver medals in previous competitions.