The Utah runner girl trend is picking up speed online, with videos of a group of female runners from Utah going viral across social media.

Add Yahoo as a preferred source to see more of our stories on Google. Mirna Valerio is an ultramarathoner who runs the "Fat Girl Running" blog. She wants people to know that anyone can be a runner.

Amanda, who likes running, joins her schoolmate Alia to create a Running Girls account. He plans to take part in a bigger run, but this is not easy to do because it takes serious training on the ...