1. Myth: Obesity epidemic caused by Americans being more inactive and less likely to burn calories
Then what's fueling America's obesity problem? Plenty of evidence indicates that people are eating more than ever before. Larger portions contain more calories. Just look at muffins, for example. They used to be the size of what are now considered mini-muffins. Those were about 200 calories a piece, but typical muffins today can be three times larger and contain up to 600 calories.