Going to sound really old but "in my day" meaning when I was a child - there were little to no processed foods in my house (1970's)everything was cooked from scratch
and when you go to diet clubs now, what they teach us is get back to basics, get the fresh produce out and know what you're putting into your body
we played out after school, climbed trees and I shudder at the danger we put ourselves in - I can remember being 9 years old and being on an adventure at least a mile away from my house, we'd go out in the morning and come back only when hungry - my children are not let out of my sight
added to that there was the chippy BUT due to lack of money that was a rare treat, no macdonalds, KFC etc, I can actually remember when Wimpy was the only burger bar and that was relatively new
and there was also no sky, so childrens tv was only on for about an hour and half, now it could be on pretty much all day if we let it
so i think it's a combination of things, easily accessible processed food, fast food, lack of exercise and games, increase in computers, hand held games etc
and this is from a mum who has to force her children to go and play in the garden because they need to move and get fresh air when they would much rather be in front of the TV, PC or computer game
I also think it's acceptable these days to have a "muffin top" not necessarily caused by being overweight but having really awfully tailored clothes that are not complimentary to the female figure
now I'm off to continue practicing being Miss Jean Brodie