Current activity guidelines recommend no more than 2 h per day of recreational screen time (i.e., watching TV, DVDs, or videos, playing TV games, and computer use), and limiting sedentary transportation and reducing prolonged periods of sitting or time indoors. Reducing sedentary behavior among children is critical in order to stem the current increase in lifestyle-associated diseases (e.g., type-2 diabetes and hypertension). Despite these risks, the proportion of children who spend excessive time in sedentary behavior is increasing worldwide. These findings highlight the need for domain-focused strategies to decrease sedentary behavior in Japanese school-age children.Įxcessive sedentary behavior in childhood, such as habitual television (TV) viewing or video game play, is associated with weight gain/obesity, cardiometabolic disease risk, and poor mental health, independent of physical activity levels. Higher-grade students were less likely to meet screen-time guidelines. Time spent engaging in each domain-specific sedentary behavior differed according to sex and school grade. Higher-grade students spent more time reading or listening to music, using a computer, and doing homework. Boys spent more time in TV game use, and girls spent more time reading, listening to music, doing homework, and car travel. There were differences in the minutes of sedentary behavior between participants of 20 e.g., TV game use and homework in weekdays and weekdays and car travel in weekends. Two-way analysis of covariance and logistic regression analyses, adjusted for BMI and moderate to vigorous physical activity, were used to examine school-grade and sex differences in sedentary behaviors and the independent risk of exceeding recommended total daily screen time (< 2 h). Using a questionnaire, data regarding participants’ grade (first through third grades: lower grades fourth through six grades: higher grades), sex, weight, and height were collected in addition to the time spent per day engaging in each specific sedentary behavior separately: (1) reading or listening to music, (2) TV or video viewing, (3) TV game use, (4) internet use excluding class, (5) homework, and (6) car travel. MethodsĪ total of 625 children (330 boys) were surveyed in 20. The present study examined school-grade and sex differences in domain-specific sedentary times and concurrence with screen-time guidelines among Japanese elementary school children. Understanding the duration and behavioral context is needed. It is vital to reduce the proportion of sedentary behavior in children.
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