Physical Activity, Sedentary Behavior, Cardiorespiratory Fitness and Metabolic Syndrome in Adolescents: Systematic Review and Meta-Analysis of Observational EvidenceReportar como inadecuado




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Background

Metabolic syndrome MetS has been diagnosed in adolescents and among the associated factors are low levels of physical activity, sedentary behavior over long periods and low cardiorespiratory fitness. However, specifically in adolescents, studies present conflicting results. The aim of the present study was to conduct a systematic review and meta-analysis of observational studies, in order to map the association between physical activity, sedentary behavior, cardiorespiratory fitness and MetS in adolescents.

Methods

A search was performed in the databases PubMed, SPORTDiscus, LILACS and the Cochrane Library. For the meta-analysis, the odds ratio OR was calculated together with the respective confidence intervals 95% CI, in which the measures of effect were analyzed by dichotomous data exposure variables with MetS used as events.

Results

Eighteen studies were included in the meta-analysis. Primary analysis demonstrated that low levels of physical activity OR = 1.35 1.03 to 1.79; p = 0.03 and low cardiorespiratory fitness OR = 4.05 2.09 to 7.87; p < 0.01 were significantly associated with the development of MetS, while for sedentary behavior, represented by screen time > 2 hours-day, a significant association was not identified OR = 1.20 0.91 to 1.59; p = 0.20. Subgroup analyses demonstrated that the association between low physical activity and MetS was dependent on the use of the accelerometry technique OR = 2.93 1.56 to 5.47; p < 0.01. Screen time > 2 hours-day was significantly associated with MetS only on weekends OR = 2.05 1.13 to 3.73; p = 0.02. With respect to cardiorespiratory fitness, a significant association with MetS was found independent of the maximal oxygen uptake VO2max measurement method.

Conclusions

Low levels of physical activity, low indices of cardiorespiratory fitness and sedentary behavior, represented by screen time > 2 hours-day on weekends, were significantly associated with the development of MetS in adolescence.



Autor: Raphael Gonçalves de Oliveira , Dartagnan Pinto Guedes

Fuente: http://plos.srce.hr/



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