I'm with Jan on this one.
Today's children suffer from a lack of physical activity at school and many also tend to spend too much of their time playing computer games etc at home and do not get the benefit associated with the outdoor physical activities we used to get up to!
As for a poor diet, well, bread and dripping, fried leftovers and many more 'unhealthy' foods were all most of us were fed on back in the 'good old days.'
It's a small world Ken...I was evacuated to Yardley Wood from Folkestone during WW11....just down the road from Ladywood!
Do nothing and nothing happens.