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 .
Early childhood television viewing and kindergarten entry readiness
Background : Using a large population -based sample , this study aims to verify whether televiewing at 29 mo , a common early childhood pastime , is prospect ively associated with school readiness at 65 mo . Methods : Participants are a prospect i ve longitudinal cohort of 991 girls and 1,006 boys from the Quebec Longitudinal Study of Child Development with parent-reported data on weekly hours of televiewing at 29 mo of age . We conducted a series of ordinary least-squares regressions in which children ’s scores on direct child assessment s of vocabulary , mathematical knowledge , and motor skills , as well as kindergarten teacher reports of socioemotional functioning , were linearly regressed on early televiewing . Results : Every SD increase ( 1.2 h ) in daily televiewing at 29 mo predicted decreases in receptive vocabulary , number knowledge scores , classroom engagement , and gross motor locomotion scores , as well as increases in the frequency of victimization by classmates . Conclusion : Increases in total time watching television at 29 mo were associated with subsequent decreases in vocabulary and math skills , classroom engagement ( which is largely determined by attention skills ) , victimization by classmates , and physical prowess at kindergarten . These prospect i ve associations , independent of key potential confounders , suggest the need for better parental awareness and compliance with existing viewing recommendations put forth by the American Academy of Pediatrics ( AAP )
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 .