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Arch Pediatr Adolesc Med. 2000;154:314.

	Since this article does not have an abstract, we have provided the first 150 words of the full text and any section headings.

Williams et al¹ report that when adolescents perceive messages about not smoking as autonomously supportive, they have more autonomous motivation for not smoking, and that, in turn, predicts a decrease in their self-reports of smoking. Additional research to clarify how best to structure a presentation focused on tobacco self-regulation for adolescents may include findings that newborns and infants born to smoking mothers had higher arousal thresholds to auditory challenges than those born to nonsmoking mothers. The impact of exposure to cigarette smoke occurred before birth.²

In contrast, Clapp et al³ report that 5-day-old offspring of women who continued to exercise regularly throughout pregnancy by running, performing aerobics, swimming, or using stair-climbing machines were better able to orient to environmental stimuli and regulate their state to quiet themselves after light and sound stimuli. They suggest that this may have been owing to a learned response to an intermittent arousal stimulus, such . . . [Full Text of this Article]