The interesting thing is that everybody really already knows this, because there are few examples in life that don’t follow the basic rules of the universe, the ones that dictate the behavior of everything. One of the most basic of those rules is that, with the exception of the occasional lottery winner, you pretty much get out of an effort what you put into it. We’re all quite familiar with this reality, although we are often willing to believe people who tell us otherwise, about exercise and about life. The sooner everybody—both halves of the population—accepts the fact that effective exercise is more like training for athletics and less like lying around on the floor, more about performance and less about appearance, the sooner it will be understood that women really don’t need their own figure salon.