You're a well-informed workout buff—so when science suggests that one of your trusty training rules might actually be ineffective, it can send your head spinning. We know: We read fitness science all the time, and that steady churn of "study says" stories has stirred up plenty of controversy in gyms and training studios around the world.

But don’t worry—we're here to set you straight. We’ve cleared up seven of the top fitness myths circulating your gym, so you never feel compelled to buy into these oft-repeated-but-never-true bits of "wisdom" you need to stop believing now.