>An Australian study presented at the 2009 European Congress on Obesity was about neither Australia nor Europe. It was about America, and it said that Americans are fat because they eat too much.
Analysis of data on American food consumption from 1970 to 2002, correlated with increases in weight, found that the new obesity epidemic among American children was pretty much entirely explained by increased calorie intake, with decreased physical activity level playing a less significant role than previously thought.
The role of over-eating among American adults accounted for most of the increase in adult obesity; a lower level physical activity (documented in many earlier studies) was a secondary factor.
A spokesman for the American College of Cardiology, reacting to the Australian study, put a lot of the blame on eating out, saying that people eat significantly more — as much as 500 calories more — when eating out than when eating at home.