Sedentary behaviour and adiposity in youth: a systematic review of reviews and analysis of causality
Article
Article Title | Sedentary behaviour and adiposity in youth: a systematic review of reviews and analysis of causality |
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ERA Journal ID | 13586 |
Article Category | Article |
Authors | Biddle, Stuart J. H. (Author), Garcia Bengoechea, Enrique (Author) and Wiesner, Glen (Author) |
Journal Title | International Journal of Behavioral Nutrition and Physical Activity |
Journal Citation | 14 (1) |
Number of Pages | 21 |
Year | 2017 |
Place of Publication | United Kingdom |
ISSN | 1479-5868 |
Digital Object Identifier (DOI) | https://doi.org/10.1186/s12966-017-0497-8 |
Web Address (URL) | https://ijbnpa.biomedcentral.com/articles/10.1186/s12966-017-0497-8 |
Abstract | Sedentary behaviour (sitting time) has becoming a very popular topic for research and translation since early studies on TV viewing in children in the 1980s. The most studied area for sedentary behaviour health outcomes has been adiposity in young people. However, the literature is replete with inconsistencies. Methods: We conducted a systematic review of systematic reviews and meta-analyses to provide a comprehensive analysis of evidence and state-of-the-art synthesis on whether sedentary behaviours are associated with adiposity in young people, and to what extent any association can be considered 'causal'. Searches yielded 29 systematic reviews of over 450 separate papers. We analysed results by observational (cross-sectional and longitudinal) and intervention designs. Results: Small associations were reported for screen time and adiposity from cross-sectional evidence, but associations were less consistent from longitudinal studies. Studies using objective accelerometer measures of sedentary behaviour yielded null associations. Most studies assessed BMI/BMI-z. Interventions to reduce sedentary behaviour produced modest effects for weight status and adiposity. Accounting for effects from sedentary behaviour reduction alone is difficult as many interventions included additional changes in behaviour, such as physical activity and dietary intake. Analysis of causality guided by the classic Bradford Hill criteria concluded that there is no evidence for a causal association between sedentary behaviour and adiposity in youth, although a small dose-response association exists. Conclusions: Associations between sedentary behaviour and adiposity in children and adolescents are small to very small and there is little to no evidence that this association is causal. This remains a complex field with different exposure and outcome measures and research designs. But claims for 'clear' associations between sedentary behaviour and adiposity in youth, and certainly for causality, are premature or misguided. |
Keywords | adolescents; BMI; children; obesity; screen time; sedentary; television; weight status |
ANZSRC Field of Research 2020 | 321099. Nutrition and dietetics not elsewhere classified |
Byline Affiliations | Victoria University |
McGill University, Canada | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q41w1/sedentary-behaviour-and-adiposity-in-youth-a-systematic-review-of-reviews-and-analysis-of-causality
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