The Journal of pediatrics · 2013
Which contributes more to childhood adiposity-high levels of sedentarism or low levels of moderate-through-vigorous physical activity? The Iowa Bone Development Study.
СтатьяПоддержка NIH: внешняя программаНазвание и аннотация: Перевод пока не подготовлен
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Kwon Soyang, Burns Trudy L, Levy Steven M, Janz Kathleen F
Аннотация
OBJECTIVE: To examine the relative importance of sedentarism and moderate-to-vigorous physical activity for adiposity development in children and adolescents.
STUDY DESIGN: 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.
RESULTS: 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.
CONCLUSIONS: 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.
STUDY DESIGN: 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.
RESULTS: 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.
CONCLUSIONS: 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.