I ran across PCRM (Physicians Committee for Responsible Medicine) years ago trying to find some help outside of pharmaceuticals for my migraines.  I've been following them on a more or less regular basis since and have learned quite a bit from reading their materials. This started with their Natural Approach to Migraines .  If you suffer from migraines, give it a read. Yesterday, they posted a blurb about a study on exercise. Exercise is healthy (can anyone dispute that?), but it is not a determining factor in how much a child weighs. Socioeconomic status was relevant. While the study was done on 3-6 year olds, I cannot help but make the personal connection to the food we find in too many school cafeterias. However, just a little research shows that students throw better food choices away - something I personally saw in my last school when more fruits and veggies were placed on plates. So what is the answer?