Associations between objective ly measured total sedentary time and indicators of adiposity and motor development were predominantly null .
Associations between screen time and indicators of adiposity , motor or cognitive development , and psychosocial health were primarily unfavourable or null .
Associations between time spent seated ( e.g. , in car seats or strollers ) or in the supine position , and indicators of adiposity and motor development , were primarily unfavourable or null .
Conclusions These findings continue to support the importance of minimizing screen time for disease prevention and health promotion in the early years , but also highlight the potential cognitive benefits of interactive non-screen-based sedentary behaviours such as reading and storytelling .
Background The purpose of this systematic review was to examine the relationships between  sedentary behaviour ( SB ) and health indicators in children aged 0 to 4 years , and to determine what doses of SB ( i.e. , duration , patterns [ frequency , interruptions ] , and type ) were associated with health indicators .
Television exposure as a risk factor for aggressive behavior among 3-year-old children.
OBJECTIVE To examine associations of  child television ( TV ) exposure and household TV use with  aggressive behavior among 3-year-old children while controlling for demographic characteristics and risk and protective factors for aggression . DESIGN The Fragile Families and Child Wellbeing Study , a prospect i ve cohort study . SETTING Data collected at home and by telephone from parents of children born from 1998 to 2000 from 20 cities . PARTICIPANTS Mothers who completed a 36-month in-home survey and met inclusion criteria ( n = 3128 ) . MAIN EXPOSURE Direct child TV exposure and household TV use were the primary explanatory variables . Additional risk factors included neighborhood disorder and maternal factors like depression . OUTCOME MEASURES Childhood aggression was assessed with the Child Behavior Checklist/2 - 3 . Multivariate linear regression models were used to examine associations between TV measures , additional risk factors , and childhood aggression . RESULTS Children who were spanked in the past month ( beta = 1.24 , P < .001 ) , lived in a disorderly neighborhood ( beta = 2.07 , P < .001 ) , and had a mother reporting depression ( beta = 0.92 , P < .001 ) and parenting stress ( beta = 0.16 , P < .001 ) were significantly more likely to exhibit aggressive behavior .  Direct child TV exposure  ( beta = 0.16 , P < .001 ) and household TV use ( beta = 0.09 , P < .001 ) were also significantly associated with childhood aggression , even when controlling for other factors . CONCLUSIONS Three-year-old children exposed to more TV , both directly and indirectly , are at increased risk for exhibiting aggressive behavior . Further research is essential to determine whether pediatric recommendations concerning TV and children should include limits for general household TV use
Associations between objective ly measured total sedentary time and indicators of adiposity and motor development were predominantly null .
Associations between screen time and indicators of adiposity , motor or cognitive development , and psychosocial health were primarily unfavourable or null .
Associations between time spent seated ( e.g. , in car seats or strollers ) or in the supine position , and indicators of adiposity and motor development , were primarily unfavourable or null .
Conclusions These findings continue to support the importance of minimizing screen time for disease prevention and health promotion in the early years , but also highlight the potential cognitive benefits of interactive non-screen-based sedentary behaviours such as reading and storytelling .
Background The purpose of this systematic review was to examine the relationships between  sedentary behaviour ( SB ) and health indicators in children aged 0 to 4 years , and to determine what doses of SB ( i.e. , duration , patterns [ frequency , interruptions ] , and type ) were associated with health indicators .