No, running won’t make you infertile. 8 sexist myths women runners disproved

Myths about women in sport date back at least to the dawn of the Olympics 2,800 years ago, when women weren’t allowed to compete. These myths “remain hard to shake,” according to sports journalist Maggie Mertens. For instance, it wasn't until 1972 that women were allowed to run in the Boston Marathon — it was considered too long and grueling for them physiologically.