Associations of sugar-sweetened beverage consumption and screen time with physical fitness index: a multicentre cross-sectional study among Chinese adolescents

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BackgroundPast research has focused on the analysis of the association between sugar-sweetened beverages consumption and screen time, respectively, and an indicator of physical fitness in adolescents. However, no studies have analyzed the interaction between sugar-sweetened beverage consumption and screen time on physical fitness index.MethodsDemographic information, lifestyle, sugar-sweetened beverage consumption and screen time were investigated and physical fitness indicators were tested in 8136 adolescents aged 13–18 years from six geographic regions of China using stage-stratified whole population sampling. The chi-square test and one-way ANOVA were used to compare the covariates. The Kruskal-Wallis test was used to compare physical fitness index between different sugar-sweetened beverage consumption and screen time groups. Generalized linear model ordered logistic regression analysis was used to analyze the interaction between sugar-sweetened beverage consumption and ST on physical fitness index.ResultsThe differences in physical fitness index among different sugar-sweetened beverage consumers in child adolescents were all statistically significant in boys, girls, and in total (H-value of 72.415, 16.859, and 78.544, P < 0.001). The differences were also statistically significant when comparing the physical fitness index of Chinese adolescents of different screen time in boys, girls, and total (H-Value of 46.307, 21.552, and 65.287, P < 0.001). Overall, using sugar-sweetened beverage consumption ≤ 1time/week and screen time < 60 min/d as the reference group, after adjusting for relevant covariates, adolescents in the group with an sugar-sweetened beverage consumption of ≥ 5 time/week and screen time > 120 min/d (OR = 2.27, 95% CI:1.78, 2.89) had the the highest risk of reduced physical fitness index (P < 0.001 ).ConclusionAssociations of sugar-sweetened beverage consumption and screen time with physical fitness indices among Chinese adolescents. Both increased sugar-sweetened beverage consumption and prolonged ST further increased the risk of lower physical fitness index in adolescents.