Diet: Do It by Exercise

Most fat men do not exercise enough — sometimes on the theory that exercise will only make them hungrier.

For many, this may be wrong, reports Dr. Jean Mayer in Science. By a quirk of body chemistry, the brain's appetite-regulating centers can create the opposite effect — if you exercise enough, you may eat less and get thinner.

Dr. Mayer, a top nutritionist at Harvard's School of Public Health, believes that his theory applies widely to U.S. men who now weigh an average seven pounds more than they did 50 years ago, even though...

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