I'd just like to give this link to a Radio 4 investigation on obesity again to remind people that some experts in this area think the obsession with obesity etc is being overplayed.
The truth about obesity
I don't know if the OP's child is overweight or not and a sensible diet and more excercise probably can't hurt but w e do need to be really careful about putting children on any sort of diet.
For those who can't be bothered to read the whole article the bit I found most interesting is below - particularly the bit at the end about the stats we use to determine which child is overweight and which isn't
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One of the most alarming statistics about obesity is that a third of children are now overweight. We are told that weight is now even a problem among the youngest school children.
An estimated 25% of 5-year-olds are now overweight, according to the government's Health Survey for England. That might be the statistic, but some are still sceptical.
When you visit schools it's certainly hard to find these large numbers of overweight kids. Doctor Linda Voss is the co-ordinator of the Early Bird Study, which is looking at the links between childhood obesity and diabetes. Put on the spot in a school even her expert eye failed to spot these numbers of fat kids.
Like many experts, she thinks it's our view of normal that has changed.
"I think I failed to spot the overweight kids because we are so used to seeing overweight kids these days," she says.
But another reason we can't see them could be because the figures are misleading. The figures the government use are based on a 1990 benchmark. It put the weight and height measurements from different surveys on a graph and decided that the top 15% of kids would be called overweight and the top 5% obese. As our children have got heavier, more and more have passed these benchmarks.
If you think the benchmarks seem rather arbitrary, the first to agree with you is the man who came up with them.
"I've taken a graph and drawn a line on it," says Tim Cole, professor of medical statistics at the Institute of Child Health.
"I'm not saying they are healthy and they are not. The idea that these numbers are cast in stone is absolute nonsense. It is all built on sand."
But the UK's way of calculating obese and overweight children isn't the only one. If we adopted the international standard we would roughly cut our figures for fat children in half.