Conclusions Meta- analysis of data from prospect i ve cohort studies showed small , inconsistent and non-significant associations between sedentary behavior and body weight
Background The cumulative effect of too much sedentary behavior may contribute to  weight gain and obesity .
Objective The aim of this study was to conduct a systematic review and meta- analysis of prospect i ve cohorts and r and omized controlled studies to determine the association between sedentary  behavior  and body weight and obesity in adults .
High sitting time or obesity: Which came first? Bidirectional association in a longitudinal study of 31,787 Australian adults
Objective Evidence on the direction of the association between sitting time and obesity is limited . The prospect i ve associations between baseline total sitting time and subsequent changes in body mass index ( BMI ) , and baseline BMI and subsequent changes in sitting time were examined . Methods BMI , from self-reported height and weight , and a single-item  measure of sitting time  were ascertained at two time points ( 3.4 ± 0.96 years apart ) in a prospect i ve question naire-based cohort of 31,787 Australians aged 45–65 years without severe physical limitations . Results In a fully adjusted model , baseline obesity was associated with  increased sitting time among all participants ( adjusted odds ratio [ aOR ] = 1.20 [ 95 % CI , 1.11 - 1.30 ] ; P < 0.001 ) and in most subgroups . The association was significant among those who were sitting < 4 hours/day ( aOR = 1.24 [ 95 % CI , 1.07 - 1.44 ] ; P = 0.004 ) and 4–8 hours/day at baseline ( aOR=1.18 [ 95 % CI , 1.06 - 1.32 ] ; P = 0.003 ) , but not in the high sitting groups ( P = 0.111 and 0.188 for 8–11 and ≥11 sitting hours/day , respectively ) . Nonsignificant and inconsistent results were observed for the association between baseline sitting time and subsequent change in BMI . Conclusions Our findings support the hypothesis that obesity may lead to a  subsequent increase in total sitting time  , but the association in the other direction is unclear
Conclusions Meta- analysis of data from prospect i ve cohort studies showed small , inconsistent and non-significant associations between sedentary behavior and body weight
Background The cumulative effect of too much sedentary behavior may contribute to  weight gain and obesity .
Objective The aim of this study was to conduct a systematic review and meta- analysis of prospect i ve cohorts and r and omized controlled studies to determine the association between sedentary  behavior  and body weight and obesity in adults .