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Newspaper ads promise that exercise is not needed for success on the South Beach Diet. The book offers just a half-page on physical activity, which Wadden says is surprising given that Agatston is a cardiologist. “It’s true that you don’t have to exercise to lose weight,” Wadden says, “but it sure helps.” And as Wadden notes, increased physical activity is good for improving such other things as energy, sleep, mood and blood pressure.
