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Combinations of Epoch Durations and Cut-Points to Estimate Sedentary Time and Physical Activity Among Adolescents
University of Gothenburg. (HA)
University of Gothenburg. (HA)
University of Gothenburg. (HA)
Karolinska Institutet. (HA)
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2017 (English)In: Measurement in Physical Education and Exercise Science, ISSN 1091-367X, E-ISSN 1532-7841, Vol. 21, no 3, 154-160 p.Article in journal (Refereed) Published
Abstract [en]

The purpose of the current study was to investigate how combinations of different epoch durations and cut-points affect the estimations of sedentary time and physical activity in adolescents. Accelerometer data from 101 adolescents were derived and 30 combinations were used to estimate sedentary time, light, moderate, vigorous, and combined moderate-to-vigorous physical activity. Data were analyzed with repeated measurement analyses of variance. Large differences of sedentary time and times of different physical activity intensities were observed between 1 s and longer epoch durations using virtually all cut-points. Generally, sedentary time, moderate physical activity, vigorous physical activity, and combined moderate-to-vigorous physical activity progressively decreased, whereas light physical activity increased with longer epoch durations. The extreme differences between cut-points were large and increased with longer epoch durations for sedentary time and for all physical activity intensities except for vigorous physical activity per epoch duration. Caution is required when cross-comparing studies using different epoch durations and cut-points. To accurately register adolescents’ spontaneous intermittent physical activity behavior, short epoch durations are recommended.

Place, publisher, year, edition, pages
Taylor & Francis, 2017. Vol. 21, no 3, 154-160 p.
Keyword [en]
accelerometry, accelerometer, activity monitor, adolescents, sedentary behavior, sedentary time
National Category
Sport and Fitness Sciences
Research subject
Health and Caring Sciences
Identifiers
URN: urn:nbn:se:lnu:diva-61642DOI: 10.1080/1091367X.2017.1309657OAI: oai:DiVA.org:lnu-61642DiVA: diva2:1083901
Projects
HA projektet Göteborgs Universitet
Available from: 2017-03-22 Created: 2017-03-22 Last updated: 2017-07-26Bibliographically approved

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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf