Born to Run by Christopher McDougall.
Ha! There is NO way I'm going to be strapping my 45-pound 4-year-old to my back and running (even walking) anywhere! That's why I go to Weight Watchers -- so I DON'T have to carry extra weight around! In his next breath he writes -- "Emily Baer beat ninety other men and women to finish eighth overall while stopping at every aid station to breast-feed her infant son." Good for you Emily. Not happening any time soon with me! LOL