| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
|
|
|
|||||||
|
|||||||||
Original Research Communication |
1 From the Department of Nutritional Sciences (M-CW, PBC, MH, and KS) and the School of Public Health (M-CW), University of California, Berkeley; the Western Human Nutrition Research Center, US Department of Agriculture, Davis, CA (MVL); and the Department of Pediatrics, Stanford University School of Medicine, CA (LKB).
Background: An average daily calcium intake of 1300 mg is recommended for North American adolescents aged 9–18 y. However, questions remain about these recommendations.
Objective: We assessed whether there is a stage of puberty when dietary calcium is more strongly related to peak bone mass, as indicated by young adult bone mass (YABM); whether dietary calcium intake > 1000 mg/d in adolescence is associated with higher YABM; and whether race affects any of these associations between dietary calcium and YABM. Secondarily, we evaluated relations between sedentariness and YABM.
Design: In a retrospective cohort study, we recruited 693 black and white women aged 21–24 y who had participated in the 10-y National Heart, Lung, and Blood Institute Growth and Health Study and measured YABM with the use of dual-energy X-ray absorptiometry. Dietary calcium and sedentary activity data, gathered through 3-d food records and self-reports of television-video viewing at 8 annual examinations, were averaged over 3 pubertal stages. Complete data were available from 161 black and 180 white females. Multiple regression, controlling for race, weight, and height, was applied to assess diet and activity relations with YABM.
Results: Dietary calcium was most strongly associated with YABM in midpuberty. Calcium intake > 1000 mg/d was associated with higher YABM, but this association was not significant at all skeletal sites. Race did not affect the observed relations between calcium and YABM. Sedentary activity in prepuberty was inversely associated with YABM.
Conclusions: Interventions should focus on ensuring adequate calcium intake in midpuberty and on minimizing sedentariness in prepuberty.
Key Words: Diet • calcium • physical activity • television viewing • puberty • peak bone mass • adolescents
This article has been cited by other articles:
|
|
 |
|
  I. Seiquer, M. Mesias, A. Munoz Hoyos, G. Galdo, and M. P. Navarro A Mediterranean Dietary Style Improves Calcium Utilization in Healthy Male Adolescents J. Am. Coll. Nutr., August 1, 2008; 27(4): 454 - 462. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 U. Alexy, T. Remer, F. Manz, C. M Neu, and E. Schoenau Long-term protein intake and dietary potential renal acid load are associated with bone modeling and remodeling at the proximal radius in healthy children Am. J. Clinical Nutrition, November 1, 2005; 82(5): 1107 - 1114. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 A. J. Lanou, S. E. Berkow, and N. D. Barnard Calcium, Dairy Products, and Bone Health in Children and Young Adults: A Reevaluation of the Evidence Pediatrics, March 1, 2005; 115(3): 736 - 743. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 JournalWatch Arch. Dis. Child., July 1, 2003; 88(7): 643 - 644. [Full Text] [PDF]
|
|
|
|
 |
|
 Make No Bones About It -- Midpuberty Is When Calcium Counts Journal Watch Women's Health, May 20, 2003; 2003(520): 10 - 10. [Full Text]
|
|
|
|
 |
|
 Make No Bones About It -- Midpuberty Is When Calcium Counts Journal Watch Pediatrics and Adolescent Medicine, April 14, 2003; 2003(414): 8 - 8. [Full Text]
|
|
| HOME | HELP | FEEDBACK | SUBSCRIPTIONS | ARCHIVE | SEARCH | TABLE OF CONTENTS |
