Click to increase image sizeClick to decrease image sizeKey words: adolescentsbicyclingchildrenwalking Additional informationNotes on contributorsJanet E. FultonThe authors gratefully acknowledge the excellent editorial assistance of Christie L. Zunker. Please address all correspondence concerning this article to Janet E. Fulton, Division of Nutrition and Physical Activity, Centers for Disease Control and Prevention, 4770 Buford Highway, NE (MS K-46), Atlanta, GA 30341.
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Fulton et al. (2005) studied this question.
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