Impact of the choice of threshold on physical activity patterns in free living conditions among adolescents measured using a uniaxial accelerometer: The HELENA study
Abstract
The aim of this study was to assess the impact of the choice of threshold on physical activity patterns measured in adolescents under free living conditions (FLC) using a uniaxial accelerometer. The study comprised 2043 adolescents (12.5-17.5 years) participating in the HELENA Study. Participants wore a uniaxial accelerometer for 7 days. The PA patterns were assessed using thresholds determined from six different studies. For each of the thresholds used, the number of adolescents fulfilling the recommendation of 60 min of moderate to vigorous PA (MVPA) per day was also calculated. A significant difference was found between thresholds regardless of the activity level: differences of 38%, 207%, 136%, and 2780% for sedentary, light, moderate, and vigorous intensity PA, respectively (P < 0.001). Time of MVPA varied between methods from 25.3 to 55.2 min · day(-1). The number of adolescents fulfilling the recommendation varied from 5.9% to 37% according to the thresholds used. The kappa coefficient for concordance in the assessment of the number of adolescents achieving the PA recommendations was generally low. The definition of the threshold for PA intensity may considerably affect the PA patterns in FLC when assessed using a uniaxial accelerometer and the number of participants fulfilling the recommendations.
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There is no clear consensus about how to define light-intensity activities by accelerometry.
“Although there is no clear consensus about how to define light-intensity activities by accelerometry [37, 38]”
From Proportion of children meeting recommendations for 24-hour movement guidelines and associations with adiposity in a 12-country study (2016) · cites this paper as [37]
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“Although there is no clear consensus about how to define light-intensity activities by accelerometry [37, 38], some studies indicate that most children spend a large proportion of their awake time being active at low levels of intensity [39–41], especially girls [40].”
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- Authors
- Vanhelst, J., Béghin, L., Salleron, J., Ruiz, J. R., Ortega, F. B., Ottevaere, C., Molnar, D., Kafatos, A., Manios, Y., Widhalm, K., Casajus, J. A., Mauro, B., SjÖStrÖM, M., & Gottrand, F.
- Affiliations
- Inserm (FR)
- Université Lille Nord de France (FR)
- Ghent University (BE)
- Harokopio University of Athens (GR)
- University of Vienna (AT)
- Venue
- Journal of Sports Sciences
- Publisher
- Informa UK Limited
- Published
- 2013-07-26
- Volume
- 32
- Issue
- 2
- Pages
- 110-115
- ISSN
- 0264-0414 (ISSN-L)
- 1466-447X
- OpenAlex
- W2148167748
- Cited by
- 17
- References
- 27
- Citations by year
- 2022: 1 · 2021: 1 · 2020: 2 · 2019: 3 · 2018: 3 · 2017: 2 · 2016: 2 · 2015: 1 · 2014: 1 · 2013: 1
- FWCI
- 1.16
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Journal of Sports Sciences (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Physiology › Physical Activity and Health
- Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Obesity, Physical Activity, Diet
- Keywords
- physical activity thresholds, adolescents, moderate-to-vigorous physical activity, sedentary behavior, light physical activity, physical activity intensity classification, physical activity guidelines, HELENA study, free-living conditions
- MeSH terms
- Adolescent, Physical Exertion, Female, Humans, Male, Reference Values, Exercise, Actigraphy
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