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 .
The relationship between physical activity, sedentary behaviour and psychological wellbeing among adolescents
Background Previous studies examining the relationship between physical activity levels and broad-based measures of psychological wellbeing in adolescents have been limited by not controlling for potentially confounding variables . The present study examined the relationship between adolescents ’ self-reported physical activity level , sedentary behaviour and psychological wellbeing ; while controlling for a broad range of sociodemographic , health and developmental factors . Methods The study entailed a  cross-sectional school-based survey in ten British towns . Two thous and six hundred and twenty three adolescents ( aged 13–16 years ) reported physical activity levels , patterns of sedentary behaviour  ( TV/computer/video usage )  and completed the strengths and difficulties question naire ( SDQ ) .  Results Lower levels of self-reported physical activity and higher levels of sedentary behaviour showed grade d associations with higher SDQ total difficulties scores , both for boys ( P < 0.001 ) and girls ( P < 0.02 ) after adjustment for age and town . Additional adjustment for social class , number of parents , predicted school examination results , body mass index , ethnicity , alcohol intake and smoking status had little effect on these findings . Conclusions Low levels of self-reported physical activity are independently associated with diminished psychological wellbeing  among adolescents . Longitudinal studies may provide further insights into the relationship between wellbeing and activity levels in this population . Ultimately , r and omised controlled trials are needed to evaluate the effects of increasing physical activity on psychological wellbeing among adolescents
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 .