Don’t mess with Jessie Graff! The professional stunt woman has a black belt in Taekwondo and a black sash in Kung Fu, is a pole vaulter, trapeze artist, and professional stuntwoman, and is a TV personality best known for her time on American Ninja Warrior. She can swing from the ceiling, do endless rounds of pull-ups (simultaneously helping her mom do some too), shoot on the mark, and make you ashamed of your abs all in one video. And she never takes a day off. She takes to Twitter and Instagram to motivate her 180K+ followers to get up, work out, and stay tough—even if it is a bit intimidating at times.