Which contributes more to childhood adiposity-high levels of sedentarism or low levels of moderate-through-vigorous physical activity? The Iowa Bone Development Study

Soyang Kwon; Trudy L Burns; Steven M Levy; Kathleen F Janz

doi:10.1016/j.jpeds.2012.11.071

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Which contributes more to childhood adiposity-high levels of sedentarism or low levels of moderate-through-vigorous physical activity? The Iowa Bone Development Study

Journal article

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Which contributes more to childhood adiposity-high levels of sedentarism or low levels of moderate-through-vigorous physical activity? The Iowa Bone Development Study

Soyang Kwon, Trudy L Burns, Steven M Levy and Kathleen F Janz

The Journal of pediatrics, Vol.162(6), pp.1169-1174

06/2013

DOI: 10.1016/j.jpeds.2012.11.071

PMCID: PMC3664130

PMID: 23305957

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Abstract

To examine the relative importance of sedentarism and moderate-to-vigorous physical activity for adiposity development in children and adolescents. A total of 277 boys and 277 girls (95% white; two-thirds of parents with college graduation or higher education) from the Iowa Bone Development Cohort Study completed body fat and accelerometry measurement at examinations of 8, 11, 13, and/or 15 years of age (during 2000-2009). The main exposure was accelerometry-measured sedentary time, frequency of breaks in sedentary time, and moderate- to vigorous-intensity physical activity time. The outcome was dual energy x-ray absorptiometry-measured body fat mass. Adjusted for age, height, physical maturity, and sedentary time, growth models showed that high moderate-to-vigorous physical activity time was associated with low body fat mass in both boys (coefficient β=-0.10±0.02) and girls (β=-0.05±0.01; P<.01). However, sedentary time and frequency of breaks in sedentary time were not associated with body fat mass. This study does not support an independent effect of sedentarism on adiposity. The preventive effect of moderate- to vigorous-intensity physical activity on adiposity in children and adolescents remained strong after adjusting for the effect of sedentarism.

Body Mass Index

Motor Activity - physiology

Humans

Risk Factors

Male

Sedentary Lifestyle

Absorptiometry, Photon

Iowa

Adolescent

Female

Adiposity - physiology

Adipose Tissue

Child

Longitudinal Studies

Cohort Studies

Details

Title: Subtitle: Which contributes more to childhood adiposity-high levels of sedentarism or low levels of moderate-through-vigorous physical activity? The Iowa Bone Development Study
Creators: Soyang Kwon - Department of Pediatrics, Northwestern University Chicago, IL, USA
Trudy L Burns
Steven M Levy
Kathleen F Janz
Resource Type: Journal article
Publication Details: The Journal of pediatrics, Vol.162(6), pp.1169-1174
DOI: 10.1016/j.jpeds.2012.11.071
PMID: 23305957
PMCID: PMC3664130
NLM abbreviation: J Pediatr
ISSN: 1097-6833
eISSN: 1097-6833
Publisher: United States
Grant note: M01-RR00059 / NCRR NIH HHS P30 ES005605 / NIEHS NIH HHS M01 RR000059 / NCRR NIH HHS R01 DE009551 / NIDCR NIH HHS R01-DE12101 / NIDCR NIH HHS R01-DE09551 / NIDCR NIH HHS R01 DE012101 / NIDCR NIH HHS
Language: English
Date published: 06/2013
Academic Unit: Preventive and Community Dentistry; Epidemiology; Health, Sport, and Human Physiology
Record Identifier: 9983917770802771

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