It's interesting to me, that all this emphasis on our own and other peoples weight, all the education programmes ,in fact in the UK the national health service will send parents letters if their child is fat. {and sometimes they get it wrong because BMI is very inaccurate}, we are getting two extremes in society. Extremely fit looking people, especially men, with low bodyfat ,muscle and all the rest of it, and the other growing extreme are extremely fat people.
I blame it on two things, many people aren't built for extreme diet and fitness programmes, hell many aren't built to go to the gym 3 times a week,. I myself train six days a week and like other serious trainers I use under the counter supplements and spend huge amounts of money on my diet , we get people coming to the gym all the time,who blatantly hate every single minute of it, they last a month at most. Many people , try all these fad diets and fitness programmes, they fail, get depressed and then the depression leads to worse over eating. The supplement industry lies, about what supplements can do for you, they use fitness models, men and women to sell their products, when the reality is, there is liberal use of photoshop, steriods,fat burners ,lighting, in the before and after pics. Many people are taken in by this, they fail and never even bother with keeping fit again. Fitness doesn't need to be extreme diets and fitness training, frequent walking, a jog or a fun a few times a week, getting up every morning and doing pressup and situps. Even doing a sensible enjoyable training programme in the gym.
The second issue, is it isn't so much the diet has got worse really,I remember what I ate as child, .... far worse than what kids are given these days. What has changed is people are much less active generally especially children.Children are either on the computer or seem to never leave their gardens. Peoples jobs are far more sedentary, and really eating a lot of healthy food can still make you fat the same way eating a lot of unhealthy food can, your insides might look a bit better but thats about it.