Many of you probably know Massy Arias from her insane Instagram, but in case you haven't had your social feed blessed by her presence just yet, here's the scoop. Trainer and creator of the MA30Day ...

Massy Arias wasn't always a fitness guru, but now she's inspiring people all over the Internet to be their best and most fit selves: just ask any of her nearly two million Instagram followers. A ...

Add Yahoo as a preferred source to see more of our stories on Google. This photo was posted one week ago, when fitness model Massy Arias was just shy of four months pregnant. (Photo: ...