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 and DVD/video viewing in children younger than 2 years.
OBJECTIVE To determine the television- , DVD- , and video-viewing habits of children younger than 2 years . DESIGN A telephone survey of 1009 parents of children aged 2 to 24 months . SETTING Parents in Minnesota and Washington state were surveyed . PARTICIPANTS A r and om sample of parents of children born in the previous 2 years was drawn from birth certificate records . Households in which English was not spoken were excluded , as were children with major disabilities . MAIN OUTCOME MEASURE The amount of regular television and DVD/video viewing by content , reasons for viewing , and frequency of parent-child coviewing . RESULTS By 3 months of age , about 40 % of children regularly watched  television , DVDs , or videos .  By 24 months , this proportion rose to 90 % . The median age at which regular media exposure was introduced was 9 months . Among those who watched , the average viewing time per day rose from 1 hour per day for children younger than 12 months to more than 1.5 hours per day by 24 months . Parents watched with their children more than half of the time . Parents gave education , entertainment , and babysitting as major reasons for media exposure in their children younger than 2 years . CONCLUSIONS Parents should be urged to make educated choices about their children 's media exposure . Parental hopes for the educational potential of television can be supported by encouraging those parents who are already allowing screen time to watch with their 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 .