In conclusion , very little is known about sedentary behaviors other than screen time in this age group .
Although highly variable , findings suggest that children are already engaging in high levels of screen time by age 2 and the majority exceed current recommendations
Sedentary behavior has negative health outcomes , evident even in young children .
Identifying the prevalence of sedentary behavior in children < 2years is important for determining the necessity for intervention strategies .
The aim of this systematic review was to determine the prevalence of sedentary behavior in children < 2years .
Early Television Exposure and Children’s Behavioral and Social Outcomes at Age 30 Months
Background Previous research has suggested that television ( TV ) viewing may be associated with increased behavioral and emotional problems in children . However , there are few prospect i ve studies targeted for its association with outcomes of children under 3 years old . The purpose of this study was to exam the association between children ’s early TV exposure at ages 18 and 30 months and the behavioral and  emotional outcomes at age 30 months . Methods We analyzed data collected prospect ively in the Japan Children ’s Study .  TV exposure was assessed by mothers ’ report at infant ages of 18 and 30 months . The outcomes were assessed using the Strengths and Difficulties Question naire ( SDQ ) . Analysis of Covariance was used to estimate the effect of TV exposure on behavioral and emotional outcomes . Results The percentage of children who watched TV 4 hours or more per day was 29.4 % at age 18 months , 24.5 % at age 30 months , and 21 % at both ages . Hyperactivity – inattention at age 30 months was positively associated with TV exposure at age 18 months , whereas prosocial behavior was negatively associated with hours of exposure even after adjustment . However , there were no significant differences in SDQ subscales according to daily hours of TV viewing at age 30 months . Conclusions Daily TV exposure at age 18 months was associated with hyperactivity – inattention and prosocial behavior at age 30 months . However , the directly casual relation was not proved in the present study . Additional research considering the TV program content and exposure timing are needed to investigate the causal relation between TV viewing and behavioral outcome
In conclusion , very little is known about sedentary behaviors other than screen time in this age group .
Although highly variable , findings suggest that children are already engaging in high levels of screen time by age 2 and the majority exceed current recommendations
Sedentary behavior has negative health outcomes , evident even in young children .
Identifying the prevalence of sedentary behavior in children < 2years is important for determining the necessity for intervention strategies .
The aim of this systematic review was to determine the prevalence of sedentary behavior in children < 2years .