Of course it does. Or I should say it can. It's burning calories. If calories in are less than calories used, you lose weight. What is true is that it's very ea

Of course it does. Or I should say it can. It's burning calories. If calories in are less than calories used, you lose weight. What is true is that it's very easy to eat more calories than you can practically hope to burn off by exercise. The people doing physical labor for 10 hours a day who are still fat are probably eating Big Macs, Fries, and 48oz cokes for lunch and having 3-6 beers after work.