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 .
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
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 .