Earlier quoted context omitted.
I've only ever visited San Francisco in the US, and the first time I was there I was slightly surprised that in terms of obesity it seemed pretty similar to Dublin (which wouldn't be the thinnest city around, but is middle of the road European). Then I flew back via O'Hare, and really saw the difference when waiting for the transfer; quite dramatic levels of obesity. I wonder how much of it is just down to urban Amer…
It’s all diet. I visited Nashville a couple of years ago and everything on the menu was fried or just terrible for you. Most of weight is diet. Exercise helps a tiny amount but is more for your cardiovascular health and strength. Running for an hour burns far fewer calories than half of a muffin.
As a guy who runs pretty hard and weighs over 200 lbs, I burn nearly 1000 calories in an hour of running (~11km distance). I've tried a few different models to estimate this and they all more or less agree.
A lightweight person jogging at low intensity for an hour, maybe.