Women really do run the world. For nearly a decade, more women runners have been crossing the finish line than men. In the United States, women make up 57 percent of finishers — that’s about 10.7 million women racing. Globally, female race participation is up 25 percent, compared to 7 percent for men. That’s a lot of girl power, which is why we’ve created this women-only guide to running. Here you’ll find advice about the big and small challenges of running while female, and how women can get faster and stronger in spite of them. So ladies, grab the sports bra, lace up your sneakers and let’s hit the road.