Almost everyone tells us we should get as much exercise as possible. But the effects of exercise are sometimes controversial.
Exercise alone isn't apt to make you lose much weight. For example, walking, an excellent form of exercise because it doesn't put a lot of extra strain on your joints as running does, but burns very few calories.
The other day, I walked a total of about 3 miles, according to my pedometer. It said I'd burned 200 calories. Big deal. I could cancel that out with a...


