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 .
Television viewing and long-term weight maintenance: results from the National Weight Control Registry.
OBJECTIVE To examine the role of television ( TV ) viewing in long-term maintenance of weight loss . RESEARCH METHODS AND PROCEDURES All subjects ( N = 1422 ) were enrolled in the National Weight Control Registry ( NWCR ) , a national sample of adults who have maintained a minimum weight loss of 13.6 kg for at least 1 year . Participants self-reported the average number of hours of weekly TV viewing at entry into the NWCR and at a 1-year follow-up . Cross-sectional and prospect i ve analyses were performed to determine the frequency of TV viewing  and the extent to which TV viewing was independently associated with weight regain over the 1-year of follow-up . RESULTS A relatively high proportion ( 62.3 % ) of participants reported watching 10 or fewer hours of TV per week on entry in the NWCR . More than one third of the sample ( 36.1 % ) reported watching < 5 h/wk , whereas only 12.4 % watched > or = 21 h/wk , which contrasts markedly from the national average of 28 hours of TV viewing per week reported by American adults . Both baseline TV viewing ( p < or = 0.02 ) and increases in TV viewing ( p < or = 0.001 ) over the follow-up were significant predictors of 1-year weight regain , independent of physical activity and dietary behaviors . DISCUSSION Individuals who are successful at maintaining weight loss over the long term are likely to spend a relatively minimal amount of time watching TV
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 .