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 .
Adiposity and TV viewing are related to less bone accrual in young children.
OBJECTIVE To examine the relation between baseline fat mass and gain in bone area and bone mass in preschoolers studied prospect ively for 4 years , with a focus on the role of physical activity and TV viewing . STUDY DESIGN Children were part of a longitudinal study in which measures of fat , lean and bone mass , height , weight , activity , and diet were taken every 4 months from ages 3 to 7 years . Activity was measured by accelerometer and TV viewing by parent checklist . We included 214 children with total body dual energy x-ray absorptiometry ( Hologic 4500A ) scans at ages 3.5 and 7 years . RESULTS Higher baseline fat mass was associated with smaller increases in bone area and bone mass over the next 3.5 years ( P < .001 ) . More TV viewing was related to smaller gains in bone area and bone mass accounting for race , sex , and height . Activity by accelerometer was not associated with bone gains . CONCLUSIONS Adiposity and TV viewing are related to less bone accrual in preschoolers
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 .