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"Their restraint, the researchers said, was due to a concomitant increase in other hormones that initiate satiety. These hormones, only recently discovered and still not well understood, tell the body that it has taken in enough fuel; it can stop eating. The augmented levels of the satiety hormones, the authors write, “muted” the message from ghrelin. Sitting and, notably, walking did not change the blood levels of the women’s satiety hormones, and the walkers overate, consuming more calories at the buffet than they had burned.
A related study published in December looked at the effects of moderate exercise, the equivalent of brisk jogging. It found that after 12 weeks, formerly sedentary, overweight men and women began recognizing, without consciously knowing it, that they should not overeat."
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