Staying healthy is becoming harder and harder. We used to live in a society where our jobs usually involved physical exertion of some kind, meaning that people were practically exercising all day long. In an agrarian culture, this meant tilling crops, raking stuff (notice how my knowledge of agrarian culture is already starting to wane), and the like. This was hard work. So was working in a factory, laying bricks, digging ditches, and carrying lumber and steel. Nowadays, however, many people spe