Spinning class. We have such a love/hate relationship, sure, I burn over 500 calories every time I go but it's so freaking hard. Everyone thinks that cycling would be an easy class--you're sitting on a bike after all. But holy guacamole it is the longest 45 minutes I've ever experienced, do not underestimate the power of a high resistance stationary bike. If you've ever been through a spin class, you probably know what I'm talking about. And this video probably perfectly captures what goes through your head every time you (insanely) decide to go to a spinning class.