Possibly depends on just 9 or nearly 10 and u may well be right, I was in a rush! I think I mainly.looked where it was in the middle ISH of the green zone! (i.e. healthy weight range!) I think we can agree that if height and weight plod along the SAME percentile, then the child is in the healthy weight range according to all the NHS BMI measures.
To be overweight the weight needs to be in a range above the height.
BMI is about weight and whether it is proportional to height given age and gender.
I have two boys - one was 50th centile height, 50th centile weight and unsurprisingly therefore 50th centile BMI.
The other is tallllllllll... I can't remember the exact figures but something like 98th centile height, 75th centile weight and BMI was in normal range but low end (because his weight was lower than his height curve).
Personally, I'm around 50th centile height, but my weight is above that! So my BMI skirts around the top of the healthy BMI (sometimes creeps into overweight if I let rip on the custard creams!)
I think knowing BMI is helpful.
There is so much talk on this thread about rugby players! Let's face it, very few kids who have a high BMI are professional level athletes or even club level athletes. Most kids with a high BMI are just average kids. In which case the BMI is a helpful guide to let parents know the weight of their kid has crept up and they'd b wise to do.aomething about it.