Accelerometer and self-reported measures of sedentary behaviour and associations with adiposity in UK youth |
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| Authors: | Robert J Noonan Danielle Christian Lynne M Boddy Pedro F Saint-Maurice Gregory J Welk Paul R Hibbing |
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| Institution: | 1. Movement Behaviours, Health and Wellbeing Research Group, Department of Sport and Physical Activity, Edge Hill University, Ormskirk, UK;2. Appetite and Obesity Research Group, Department of Psychological Sciences, University of Liverpool, Liverpool, UK;3. Physical Activity Exchange, Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, UK;4. Division of Cancer Epidemiology and Genetics, National Cancer Institute, Rockville, IN, USA;5. Department of Kinesiology, College of Human Sciences, Iowa State University, Ames, LA, USA;6. Department of Kinesiology, Recreation, and Sport Studies, University of Tennessee, Knoxville, TN, USA |
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| Abstract: | This study used accelerometer and self-report measures of overall sedentary time (ST) and screen time behaviours to examine their respective associations with adiposity among UK youth. Participants (Year groups 5, 8, and 10; n=292, 148 girls) wore the SenseWear Armband Mini accelerometer for eight days and completed the Youth Activity Profile, an online report tool designed to estimate physical activity and ST.Stature, body mass and waist circumference were measured to classify adiposity outcomes (overweight/obese and central obesity). One-way between groups ANOVA and adjusted linear, logistic and multinomial logistic regression analyses were conducted. There was a significant main effect of age on total ST across the whole week (F(2, 289)=41.64, p≤0.001). ST increased monotonically across Year 5 (581.09±107.81 min·dˉ¹), 8 (671.96±112.59 min·dˉ¹) and 10 (725.80±115.20 min·dˉ¹), and all pairwise comparisons were significant at p≤0.001. A steep age-related gradient to mobile phone use was present (p≤0.001). ST was positively associated with adiposity outcomes independent of moderate-to-vigorous intensity physical activity (MVPA; p≤0.001). Engaging in >3 hours of video gaming daily was positively associated with central obesity (OR=2.12, p≤0.05) but not after adjustment for MVPA. Results further demonstrate the importance of reducing overall ST to maintain healthy weight status among UK youth. |
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| Keywords: | Youth sedentary time screen time adiposity obesity measurement |
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