This is interesting - considering all we hear about cutbacks in phys-ed at schools, and the awful lunches. Kids apparently get fatter during the summer:
"The researchers noted that schools were often blamed for the rising obesity problem. Critics have pointed to unhealthful food in cafeterias, the sale of packaged foods and soft drinks, and too little physical activity. The new findings suggest that at least some of the criticism may belong elsewhere.
“Although a school’s diet and exercise policies may be less than ideal,” the study says, “it appears the early school environments contribute less to obesity than do nonschool environments.”
Why children would become less fit over the summer is not clear. It may be, the study said, that outside the limits of a school setting, children are even less physical and eat even worse."