Diet, not lack of exercise, drives obesity, a new study finds
You can't outrun a bad diet. Food — not lack of exercise — fuels obesity, study finds toggle caption PCH-Vector/iStockphoto via Getty Images Back in the 1800s, obesity was almost nonexistent in the United States. Over the last century, it's become common here and in other industrialized nations, though it remains rare among people who live more traditional lifestyles, such as the Hadza hunter-gatherers of Tanzania. So what's changed? One common explanation is that as societies have developed,