Accelerometer-Measured Physical Activity Levels and Patterns Vary in an Age- and Sex-Dependent Fashion among Finnish Children and Adolescents
Jussila, A.-M., Husu, P., Vähä-Ypyä, H., Tokola, K., Kokko, S., Sievänen, H., & Vasankari, T. (2022). Accelerometer-Measured Physical Activity Levels and Patterns Vary in an Age- and Sex-Dependent Fashion among Finnish Children and Adolescents. International Journal of Environmental Research and Public Health, 19(11), Article 6950. https://doi.org/10.3390/ijerph19116950
© 2022 by the authors
Background: The purpose of this study was to measure physical activity (PA), sedentary behavior (SB), and hour-by-hour PA patterns with an accelerometer in a population-based sample of Finnish children and adolescents. Methods: A total of 3274 participants (3rd, 5th, 7th, 9th graders) from 176 schools wore a hip-worn triaxial accelerometer for seven days during waking hours. Mean amplitude deviation of the acceleration data was used to assess PA intensity that was converted to metabolic equivalents and categorized into light, moderate, and vigorous PA. Angle for posture estimation was used to measure SB and standing. Results: The majority of participants’ PA consisted of light PA, and they were sedentary for more than half of their waking hours. Children were more active than adolescents, and boys were more active than girls. Participants took, on average, 9890 steps daily, and one third met the PA recommendation. The participants were divided into tertiles based on daily steps to investigate the variation in PA patterns. Compared to the least active tertile, the most active tertile took twice as many steps on weekdays and nearly three times as many steps on the weekend. Conclusions: The majority of the participants were not active enough, and there was a great variation in PA levels and patterns, especially among the adolescents and on weekends. ...
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- Liikuntatieteiden tiedekunta 
Related funder(s)Academy of Finland
Funding program(s)Strategic research programmes, AoF
Additional information about fundingThe FSPA study was financially supported by the Finnish Ministry of Education and Culture (OKM/92/626/2015) and the Strategic Research Council at the Academy of Finland (320400 and 320403).
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