Dropping a dumbbell can be dangerous. But it could be argued that the distraction and misdirection of popular workout myths is even more threatening. The promise of quicker results or more benefits—at best, it’s wishful thinking and at worst, it could really be setting you back from achieving your fitness goals. And America’s sound-bite culture isn’t helping, with the TV, internet and magazines promising “a beach body by the weekend.” So, we consulted some experts to clear up some of the most common fitness myths.