There is a large body of evidence from all study design s which suggests that decreasing any type of sedentary time is associated with lower health risk in youth aged 5 - 17 years .
In particular , the evidence suggests that daily TV viewing in excess of 2 hours is associated with reduced physical and psychosocial health , and that lowering sedentary time leads to reductions in BMI
Accumulating evidence suggests that , independent of physical activity levels , sedentary behaviours are associated with increased risk of cardio-metabolic disease , all-cause mortality , and a variety of physiological and psychological problems .
Therefore , the purpose of this systematic review is to determine the relationship between sedentary behaviour and health indicators in school-aged children and youth aged 5 - 17 years .
Behavioral correlates of television viewing in primary school children evaluated by the child behavior checklist.
BACKGROUND Television is a source from which children gain information about life and experience different types of behavior . The Child Behavior Checklist ( CBCL ) has not been used thoroughly to evaluate the behavioral effects of television viewing  on children . OBJECTIVE To examine the competency and problem behavior correlates of television viewing in school-aged children using the CBCL . DESIGN Cross-sectional survey . SETTING Two r and omly selected grade schools , one from a high-income district and the other from a low-income district . PARTICIPANTS Students in grade s 2 and 3 and their parents . MAIN OUTCOME MEASURES A question naire on  children 's time spent watching television and engaging in other daily activities  and the CBCL were sent to the parents of 888 second- and third- grade students . RESULTS Results of the question naire reported that the overall mean + /- SD daily television viewing time was 2.5 + /- 1.3 hours . Overall television viewing time had a negative correlation with social and school achievement ( r = -0.17 , P<.001 and r = 0.11 , P = .03 , respectively ) subscale scores . Withdrawn ( r = 0.11 , P = .004 ) , social problem ( r = 0.14 , P = .001 ) , thought problem ( r = 0.11 , P = .03 ) , attention problem ( r = 0.20 , P<.001 ) , delinquent behavior ( r = 0.12 , P<.001 ) , aggressive behavior ( r = 0.22 , P<.001 ) , and externalization ( r = 0.19 , P<.001 ) subscales and total problem ( r = 0.15 , P<.001 ) scores were positively correlated with time spent watching television . Stepwise logistic regression analysis revealed that the only significant variables associated with a risk of watching television for more than 2 hours were age , gender , social subscale , and attention problem subscale scores of the CBCL . CONCLUSION As evaluated by the CBCL , television viewing time is positively associated with social problems , delinquent behavior , aggressive behavior , externalization , and total problem scores . Older age , male gender , and decreasing social subscale and increasing attention problem subscale scores on the CBCL increases the risk of watching television for more than 2 hours
There is a large body of evidence from all study design s which suggests that decreasing any type of sedentary time is associated with lower health risk in youth aged 5 - 17 years .
In particular , the evidence suggests that daily TV viewing in excess of 2 hours is associated with reduced physical and psychosocial health , and that lowering sedentary time leads to reductions in BMI
Accumulating evidence suggests that , independent of physical activity levels , sedentary behaviours are associated with increased risk of cardio-metabolic disease , all-cause mortality , and a variety of physiological and psychological problems .
Therefore , the purpose of this systematic review is to determine the relationship between sedentary behaviour and health indicators in school-aged children and youth aged 5 - 17 years .