HistoryArtifacts

They had sport bras/bikinis?

Edit: https://www.ancientworldmagazine.com/articles/roman-girls-bikinis-mosaic-villa-romana-del-casale-sicily

The top part of the “bikini” worn by these girls consists of a breastband. Breastbands like this were already known in ancient Greece. The Greeks referred to the breastband as a mastodeton or apodesmos; the Romans called it a strophium. A breastband was often made of linen. Such articles of clothing were worn by women who engaged in sports or otherwise had an active lifestyle: the heroine Atalanta is sometimes depicted wearing a breastband.

And while men were generally expected to exercise naked in the Greek fashion; female public nudity was frowned upon. The ancient “bikini” allowed women to exercise in comfort without causing offence to ancient (male) sensibilities.