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 .
Energy Expenditure During Acute Periods of Sitting, Standing, and Walking.
BACKGROUND Identifying strategies to increase energy expenditure ( EE ) may help combat the harmful effects of sedentary behavior . This study examined EE during  sitting , st and ing  , and walking . METHODS Participants ( N = 74 ) were r and omized to 2 of the following activities :  sitting using a laptop computer ( SIT-C ) , sitting watching television ( SIT-T ) , st and ing watching television ( ST AND ) , and walking at a self-selected pace ≤3.0 ( mph ) ( WALK ) . Each activity lasted 15 minutes with a 3-minute transition period between activities . The experimental conditions were : SIT-C to ST AND ( N = 18 ) , SIT-T to WALK ( N = 18 ) , ST AND to SIT-C ( N = 20 ) , and WALK to SIT-T ( N = 18 ) . EE was measured using indirect calorimetry . RESULTS Based on the first activity performed , EE during WALK ( 55.92 ± 14.19 kcal ) was significantly greater than SIT-C ( 19.63 ± 6.90 kcal ) , SIT-T ( 18.66 ± 4.01 kcal ) , and ST AND ( 21.92 ± 5.08 kcal ) ( P < .001 ) . Cumulative EE in SIT-T to WALK ( 74.50 ± 17.88 kcal ) and WALK to SIT-T ( 82.72 ± 21.70 kcal ) was significantly greater than EE in SIT-C to ST AND ( 45.38 ± 14.78 kcal ) and ST AND to SIT-C ( 45.64 ± 9.69 kcal ) ( P < .001 ) . CONCLUSION Substituting periods of sitting or st and ing with walking significantly increases EE , but substituting periods of sitting with st and ing may not affect EE . Thus , the potential benefits of st and ing as opposed to sitting need further investigation beyond the role of EE
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 .