I joke about training for the uprising to “smash the patriarchy” but here’s a little secret: I’m actually not joking. I’M. NOT. JOKING. 

High-intensity training is all the rage. From CrossFit to HIIT to Insanity, people all over the world are being left in gasping sweaty piles at the end of their workouts. For what? Is the hype worth it? Do high-intensity workouts really produce high-quality results?