Bliss: there have been studies as nauseum about the benefits of regular exercise during school hours.....I remember one that had stats that showed students who wrote tests or exams after gym class scored 20% better than those who didn't.....
One issue with obesity is that with the downturn in the economy (specially in the us) people can no longer afford to eat healthy....plus for those that do have jobs, many are working longer hours and don't have the time to make healthy meals.......
Plus you have the age old BS about how a "paunch" is supposed to indicate wealth, but that should have gone out in the dark ages where anyone who could afford to eat enough to have a paunch, had to be wealthy....
I tell you, I know people who eat more at one meal than I do in three days.....I know one couple who, when talking about budgets and money, spend more money in one week on meat alone than I do for an entire month of groceries......