public transit will make us thin, cars made us fat

http://www.sciencedaily.com/releases/2010/06/100628203756.htm

In a study published in the August issue of the American Journal of Preventive Medicine, researchers from the University of Pennsylvania, Drexel University and the RAND Corporation found that construction of a light-rail system (LRT) resulted in increased physical activity (walking) and subsequent weight loss by people served by the LRT. These findings suggest that improving neighborhood environments and increasing the public's use of LRT systems could improve health outcomes and potentially impact millions of individuals.

http://www.sciencedaily.com/releases/2009/03/090326134014.htm

The study, published in the Journal of Public Health Policy, finds that people who take public transit are three times more likely than those who don't to meet the Heart and Stroke Foundation of Canada's suggested daily minimum of physical activity.

http://www.sciencedaily.com/releases/2011/04/110426122950.htm

Canadians have become heavier and less fit over the last three decades; people aged 20-39 years have the BMI (body mass index) that people aged 40 or older had thirty years ago. The 2007-2009 Canadian Health Measures Survey found more than 60% of adults were overweight or obese, with 24% being overweight, and 37% obese. If such a trend is to continue, over the next 25 years, half of Canadians over age 40 will be obese.

"Obesity is expected to surpass smoking as the leading cause of preventable morbidity and mortality," writes author

http://www.sciencedaily.com/releases/2011/05/110511131138.htm

"You can think of obesity as an energy imbalance," Jacobson said. "People consume food, which is a form of energy, and then they expend it in their activities. But if you look over the last 60-plus years, the automobile has become our primary mode of transportation -- so much so, in fact, we have literally designed our way of life around it. It is that energy imbalance that ultimately may lead to obesity."

D - most people sleepwalk their way into obesity. It happens one double-double cream coffee at a time.
Take my roomie. He was 280lbs, now down to 250lbs.
We'd go to the bar for beer 'n burgers and fries.
We'd be walking out and he'd go ooohhh! Chocolate almonds - protein.
A champion bodybuilder doesn't need that much protein!
One snack after meal at a time.
Energy imbalance.