i had to go this past semester to the assistant superintendant of schools for my school district because the middle school my daughter goes to would not let the kids go outside for recess after lunch. they were making them sit in the lunchroom the whole period. so it is not always the kids fault. when i went to school we played in the school yard before school started, then at lunch and we had an hour lunch. now they have a 40 minute lunch. this would be an area to address if there was genuine concern about kids not exercizing enough.