After all these years of media scare stories trying to terrify readers with worries about how kids are too sedentary and don't eat well, I suppose it's comforting to find a scare story about how teen boys are obsessed gym rats who consume lots of protein and very little fat. The New York Times delivers the goods: Take David Abusheikh. At age 15, he started lifting weights for two hours a day, six days a week. Now that he is a senior at Fort Hamilton High School in Brooklyn, he has been adding protein bars and shakes to his diet...