Each of Adriene's videos averages at least half a million views, thanks not only to her affable personality and easy-to-master yoga sequences but also to her unbroken output of one video a week, no matter how tenuous the subject matter may seem. "When it comes to yoga," Liam says, "you'd think there’s only so many times you can do 'yoga for anxiety' but these people keep coming up with more.” This consistency bleeds into other areas of the YouTube fitness community, too – keep an eye out for bloggers with 20 different variations on ab exercises, from ab-blaster to ab-destroyer to ab-killer.