I was anorexic from my teens into my 30's. I blame it on my naturally very slim mother who constantly harped at me to watch my weight so I wouldn't have to watch it later. And glared at me when I took seconds of anything.
I was never heavy, but more curvy than she due to my German father's genes. For instance, I was a 34-C bra when I was 14.
I was keeping a diary about what I ate when I was 13 and weighing myself ten times a day. I would fast for three days every week. I knew that I wasn't fat, but I had an overdeveloped need to please my mom.
I agree about most children not getting outdoors and getting exercise. My boys have a number of outdoor chores as well as housework that they must do and are quite slim and healthy.
I don't get after them about how much they eat other than when they get picky. The issues that I developed about food
don't need to get passed on to another generation.