The only thing really complicated about Mike's list of mistakes people make is that most people are so enthusiastic about the havoc they're wreaking on their bodies that they aren't really stopping to assess why it is that they make no gains and often get worse -- chronically worse. That's to say it's rather complicated figuring out why one can observe plain old animals, like dogs, behave in accordance with their natures, while humans have all this benefit of knowledge, science, technology and so very many use these things to violate their biological natures rather than to enhance and promote them. I'm all for "out-competing god" (one of my favorite metaphors), and I have no problem in the world with artificial or man-made means of either obviating the continued necessity of biological processes in a natural, evolved way, or circumventing nature altogether. However... Nature, to be commanded, must be obeyed. -- Francis Bacon I might state it that nature, to be commanded, must first be obeyed. You must first understand what you are doing, form hypotheses, test them, and keep testing them and developing new ones. This ensures that you are first obeying nature all the while you are trying...