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 .
Television viewing habits associated with obesity risk factors: a survey of Melbourne schoolchildren.
OBJECTIVES To examine whether children 's  television viewing may be a useful indicator of risk of obesity-promoting versus healthy eating behaviours ,  low-level physical activity ( PA )  and overweight or obesity among children of primary school entry and exit ages . DESIGN Cross-sectional study , stratified by area-level socioeconomic status . PARTICIPANTS AND SETTING 1560 children ( 613 aged 5 - 6 years [ 50 % boys ] , and 947 aged 10 - 12 years [ 46 % boys ] ) from 24 primary schools in Melbourne , Australia , r and omly selected proportionate to school size between 1 November 2002 and 30 December 2003 . MAIN OUTCOME MEASURES Parents ' reports of the time their child spends watching television , their participation in organised physical activities ( PA ) , and their food intake ; each child 's measured height and weight and their PA levels as assessed by accelerometry for one week . RESULTS After adjusting for the age and sex of child , the parents ' level of education , clustering by school , and all other health behaviour variables , children who watched television for > 2 h/day were significantly more likely than children who watched television for < or = 2 h/day to : to have one or more serves/day of high energy drinks ( adjusted odds ratio [ AOR ] , 2.31 ; 95 % CI , 1.61 - 3.32 ) , and to have one or more serves/day of savoury snacks ( AOR , 1.50 ; 95 % CI , 1.04 - 2.17 ) . They were also less likely to have two or more serves/day of fruit ( AOR , 0.58 ; 95 % CI , 0.46 - 0.74 ) , or to participate in any organised PA ( AOR , 0.52 ; 95 % CI , 0.34 - 0.80 ) . CONCLUSIONS Health practitioners in the primary care setting may find that asking whether a child watches television for more than 2 hours daily can be a useful indicator of a child 's risk of poor diet and low physical activity level
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 .