The independent prospective associations of activity intensity and dietary energy density with adiposity in young adolescents
Ambrosini, Gina L
British Journal of Nutrition
Cambridge University Press
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Van Sluijs, E., Sharp, S., Ambrosini, G. L., Cassidy, A., Griffin, S., & Ekelund, U. (2016). The independent prospective associations of activity intensity and dietary energy density with adiposity in young adolescents. British Journal of Nutrition, 115 921-929. https://doi.org/10.1017/S0007114515005097
There is limited evidence on the prospective association of time spent in activity intensity (sedentary (SED), moderate (MPA) or vigorous (VPA) activity) and dietary intake with adiposity indicators in young people. This study aimed to assess associations between 1) baseline objectively-measured activity intensity, dietary energy density (DED) and 4-year change in adiposity, and 2) 4-year change in activity intensity/DED, and adiposity at follow-up. We conducted cohort analyses including 367 participants (10yr at baseline, 14yr at follow-up) with valid data for objectively-measured activity (Actigraph), DED (4-day food diary), anthropometry (waist circumference (WC), %body fat (%BF), fat mass index (FMI), weight status), and covariates. Linear and logistic regression models were fit, including adjustment for DED and moderate-to-vigorous physical activity. Results showed that baseline DED was associated with change in WC (β for 1kJ/g difference: 0.71; 0.26:1.17), particularly in boys (1.26; 0.41:2.16 vs. girls: 0.26: -0.34;0.87), but not with %BF, FMI or weight status. In contrast, baseline SED, MPA or VPA were not associated with any of the outcomes. Change in DED was negatively associated with FMI (β for 1kJ/g increase: -0.86; -1.59:-0.12), and %BF (-0.86; -1.25:-0.11), but not WC (-0.27; -1.02:0.48). Change in SED, MPA and VPA did not predict adiposity at follow-up. In conclusion, activity intensity was not prospectively associated with adiposity, whereas the directions of associations with DED were inconsistent. To inform public health efforts, future work should continue to analyze longitudinal data to further understand the independent role of different energy-balance behaviors in changes in adiposity in early adolescence.
physical activity, sedentary behavior, dietary energy density, adiposity, prospective cohort study, epidemiology, children and adolescents
We would like to thank the schools, children and parents for their participation in the SPEEDY study. The SPEEDY study is funded by the National Prevention Research Initiative (http://www.npri.org.uk), consisting of the following Funding Partners: British Heart Foundation; Cancer Research UK; Department of Health; Diabetes UK; Economic and Social Research Council; Medical Research Council; Health and Social Care Research and Development Office for the Northern Ireland; Chief Scientist Office, Scottish Government Health Directorates; Welsh Assembly Government and World Cancer Research Fund. This work was also supported by the Medical Research Council [Unit Programme numbers MC_UU_12015/3; MC_UU_12015/4; MC_UU_12015/7; U105960389] and the Centre for Diet and Activity Research (CEDAR), a UKCRC Public Health Research: Centre of Excellence. Funding from the British Heart Foundation, Economic and Social Research Council, Medical Research Council, the National Institute for Health Research, and the Wellcome Trust, under the auspices of the UK Clinical Research Collaboration, is gratefully acknowledged. We also thank everyone who helped with the data collection and Norfolk Children’s Services for their invaluable input and support. In addition, we would like to Rebekah Steele, Kate Westgate and Stefanie Mayle from the physical activity technical team at the MRC Epidemiology Unit for their assistance in processing the accelerometer data. No authors declare a conflict of interest.
Wellcome Trust (087636/Z/08/Z)
Medical Research Council (G0501294)
Medical Research Council (MC_U106179474)
External DOI: https://doi.org/10.1017/S0007114515005097
This record's URL: https://www.repository.cam.ac.uk/handle/1810/252725
Attribution 2.0 UK: England & Wales
Licence URL: http://creativecommons.org/licenses/by/2.0/uk/