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 viewing and externalizing problems in preschool children: the Generation R Study.
OBJECTIVE To determine whether the amount , type , and patterns of television viewing predict the onset or the persistence of  externalizing problems in preschool children . DESIGN Longitudinal study of a prospect i ve population -based cohort in the Netherl and s. SETTING Parents reported time of television exposure and type of programs watched by children . Externalizing problems were assessed using the Child Behavior Checklist at 18 and 36 months . PARTICIPANTS A population -based sample of 3913 children . MAIN EXPOSURE Television viewing time , content , and patterns of exposure  ( at 24 and 36 months ) in children with and without preexisting problems to assess the incidence and persistence of externalizing problems . MAIN OUTCOME MEASURES Externalizing problems at 36 months . RESULTS Program content and time of television exposure assessed at 24 months did not predict the incidence of externalizing problems at 36 months ( odds ratio , 2.24 ; 95 % CI , 0.97 - 5.18 ) . However , the patterns of exposure over time reflecting high levels of television viewing were associated with the incidence of externalizing problems ( odds ratio , 2.00 ; 95 % CI , 1.07 - 3.75 ) and the persistence of the preexisting externalizing problems ( 2.59 ; 1.03 - 6.55 ) . CONCLUSIONS Our study showed that high television exposure increases the risk of the incidence and the persistence of externalizing problems in preschool children
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 .