BBC NEWS | Health | Children 'need hour of exercise'Ok, here's the problem. Until a few hundred years ago we got plenty of exercise and not that much food. We didn't exercise to stay healthy, we exercised to survive.
Writing in the British Medical Journal, the team conclude children need an hour of daily exercise and to eat healthily.
Now, to survive, we must learn. A lot. We must work - sitting. School is long. Walking to school is dangerous for most and rare.
My family probably makes this 3 hour a week rule for our kids (despite the fervent protestes of the 7 yo), but we don't have TV. We're positively weird and hyperkinetic and the kids don't get all their homework done. If we were to do all the homework we wouldn't make it on the exercise. (Note: the top 20% of children can do exercise and homework and probably even TV -- but that leaves the rest of us.)
There are too many requirements, not enough time. To meet this rule we'd have to either shrink homework, expand the school day (money), or substitute school exercise (recess, gym) for didactic time. Or have fat kids with diabetes. Or upgrade the human genome. This is basic math ...