Swimming lessons is where it really shows. Of the 30 or so kids that swim at the same time as my kids I see a massive difference between these really skinny 70s style kids (the majority) ridiculously muscled kids (5-10%, I genuinely swear a couple of boys in my daughter's 5-8 class have six packs), and obese kids (2-4%, maybe).
My son is short, he was a typical butter-ball breastfed baby but it melted off him between 18m-3 years. He's now 30% for heigh, 50% for weight, so short and slightly stocky.
My daughter was the same, but she's now tall for her age and athletically built. She is 6, needs age 8 in height and age 5 in width. It's really tough. Her quads and calf muscles look like a body builders though, it's crazy. She weighs low in proportion to her height, but high for her age if that makes sense.
I think the things that trigger kids to be overweight are...
- trauma, ill health as a baby. Parents feed them up.
- poverty or not prioritising healthy lifestyle within your budget
- sedentary lifestyles, electronic lifestyles.
I think parental obesity goes one of three
ways, either you get the "don't know any betters", the "we're all big in our family so what's the point in trying" types, or the "over my dead body are you turning out like me" types.