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Relation between the changes in physical activity and body‐mass index during adolescence: a multicentre longitudinal study
Author(s) -
Reading Richard
Publication year - 2005
Publication title -
child: care, health and development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.832
H-Index - 82
eISSN - 1365-2214
pISSN - 0305-1862
DOI - 10.1111/j.1365-2214.2005.00579_3.x
Subject(s) - body mass index , medicine , obesity , demography , physical activity , skinfold thickness , longitudinal study , cohort , cohort study , physical therapy , pathology , sociology
Relation between the changes in physical activity and body‐mass index during adolescence: a multicentre longitudinal study.
Kimm S.Y.S. , Glynn N.W. , Obarzanek E. , Kriska A.M. , Daniels S.R. , Barton B.A. , Liu K.(2005)The Lance,366,301–307.Background The role of physical activity in preventing obesity during adolescence remains unknown. We examined changes in activity in relation to changes in body‐mass index (BMI) and adiposity in a cohort of 1152 black and 1135 white girls from the USA, who were followed up prospectively from ages 9–19 years. Methods Body‐mass index and sum of skinfold thickness were assessed annually, whereas habitual activity was assessed at years 1 (baseline), 3, 5, and 7–10. Each girls’ overall activity status was categorized as active, moderately active, or inactive. Longitudinal regression models examined associations between changes in activity and in overall activity status with changes in BMI and in sum of skinfold thickness. Findings Each decline in activity of 10 metabolic equivalent [MET]‐times per week was associated with an increase in BMI of 0.14 kg/m 2 (SE 0.03) and in sum of skinfold thickness of 0.62 mm (0.17) for black girls, and of 0.09 kg/m 2 (0.02) and 0.63 mm (0.13) for white girls. At ages 18 or 19 years, BMI differences between active and inactive girls were 2.98 kg/m 2 ( P < 0.0001) for black girls and 2.10 kg/m 2 ( P < 0.0001) for white girls. Similar results were apparent for sum of skinfold thickness. For moderately active girls, changes in BMI and sum of skinfold thickness were about midway between those for active and inactive girls. Interpretation Changes in activity levels of US girls during adolescence significantly affected changes in BMI and adiposity. Thus, preventing the steep decline in activity during adolescence is an important method to reduce obesity.