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 .
Audible television and decreased adult words, infant vocalizations, and conversational turns: a population-based study.
OBJECTIVE To test the hypothesis that audible television is associated with decreased parent and child interactions .  DESIGN Prospect i ve , population -based observational study . SETTING Community . PARTICIPANTS Three hundred twenty-nine 2- to 48-month-old children . MAIN EXPOSURES Audible television .  Children wore a digital recorder on r and om days for up to 24 months . A software program incorporating automatic speech- identification technology processed the recorded file to analyze the sounds the children were exposed to and the sounds they made . Conditional linear regression was used to determine the association between audible television and the outcomes of interest . OUTCOME MEASURES Adult word counts , child vocalizations , and child conversational turns . RESULTS Each hour of audible television was associated with significant reductions in age-adjusted z scores for child vocalizations ( linear regression coefficient , -0.26 ; 95 % confidence interval [ CI ] , -0.29 to -0.22 ) , vocalization duration ( linear regression coefficient , -0.24 ; 95 % CI , -0.27 to -0.20 ) , and conversational turns ( linear regression coefficient , -0.22 ; 95 % CI , -0.25 to -0.19 ) . There were also significant reductions in adult female ( linear regression coefficient , -636 ; 95 % CI , -812 to -460 ) and adult male ( linear regression coefficient , -134 ; 95 % CI , -263 to -5 ) word count . CONCLUSIONS Audible television is associated with decreased exposure to discernible human adult speech and decreased child vocalizations . These results may explain the association between infant television exposure and delayed language development
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 .