By Ben Khatib Most of the germs that make us feel ill are passed on from one human to another, and the most frequent transport medium is fluid. That means that we are more prone to picking up viruses if we are in the presence of other people.That vulnerability grows when those other folks are shedding fluid. In actual life, we need to move in different planes. For example, when we are squeezing past somebody in a narrow corridor, we turn sideways and normally go forward in a crab-like movement. This puts different stresses on our muscles. If you perform a given exercise workout at a particular intensity level in a location where the temperature is 100 degrees, you will burn more calories than you would if you did the same exercise exactly in a location that has a temperature of...