6/4/2009: I started reading this book today. I've run on and off ever since I was in my 20s. I am currently trying to get back into the habit of running (and back into shape). Even though I've never had many injuries from running (other than the occasional shin splint), I am getting older and I am concerned about the wear and tear on my joints (my knees are fine, but they do creak from time to time). I was motivated to buy this book after reading this article: The painful truth about trainers: Are running shoes a waste of money?