![]() ![]() Studies using both self-report and objective measurement of physical activity have consistently shown that boys are more active than girls and that physical activity declines and time spent sedentary increases throughout adolescence. Ĭonsequently, there is interest in describing how physical activity in youth varies by factors such as sex, age and weight status between samples from different countries in order to identify potential opportunities to intervene to increase physical activity. Widely accepted public health recommendations are that young people should accumulate at least 60 min of moderate to vigorous intensity physical activity (MVPA) daily however, data suggest that the majority of youth do not meet these guidelines, with approximately 80 % of 13–15 year olds worldwide insufficiently physically active. Physical activity in youth is associated with many health benefits and physical activity behaviours established in youth are likely to be carried through into adulthood. ![]() Further research is needed to explore environmental and sociocultural explanations for these differences. Physical activity differed between samples from different countries, but the associations between demographic characteristics and physical activity were consistently observed. Physical activity varied between samples from different countries, with a 15–20 % difference between the highest and lowest countries at age 9–10 and a 26–28 % difference at age 12–13. Physical activity did not differ by weight status in the youngest children, but from age seven onwards, overweight/obese participants were less active than their normal weight counterparts. After 5 years of age there was an average cross-sectional decrease of 4.2 % in total physical activity with each additional year of age, due mainly to lower levels of light-intensity physical activity and greater time spent sedentary. Resultsīoys were less sedentary and more active than girls at all ages. Linear regression was used to examine associations between age, sex, weight status, country and physical activity outcomes. Analyses were conducted on 27,637 participants (2.8–18.4 years) who provided at least three days of valid accelerometer data. The International Children’s Accelerometry Database (ICAD) consists of ActiGraph accelerometer data from 20 studies in ten countries, processed using common data reduction procedures. ![]() This study aimed to describe objectively-measured physical activity and sedentary time patterns in youth. However, supporting data are often self-reported and/or do not encompass a wide range of ages or geographical locations. Physical activity and sedentary behaviour in youth have been reported to vary by sex, age, weight status and country. ![]()
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March 2023
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