People are significantly fatter in countries and cities where car use is more common.
Mass transit use, on the other hand, is correlated with lower obesity. But there has been scant evidence that public transportation actually causes widespread weight loss — until now.
A study of residents in Charlotte, N.C., found that users of the city’s new light rail system were 81 percent less likely to become obese, and reduced their Body Mass Index by an average 1.18 points — the equivalent of 6.45 pounds for a person 5’5″ tall.
The study appears in the American Journal of Preventive Medicine.