Reactivity to accelerometer measurement of children and adolescents.

Détails

Ressource 1Télécharger: BIB_9F2DFA020E39.P001.pdf (970.15 [Ko])
Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_9F2DFA020E39
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Reactivity to accelerometer measurement of children and adolescents.
Périodique
Medicine and Science In Sports and Exercise
Auteur(s)
Dössegger A., Ruch N., Jimmy G., Braun-Fahrländer C., Mäder U., Hänggi J., Hofmann H., Puder J.J., Kriemler S., Bringolf-Isler B.
ISSN
1530-0315 (Electronic)
ISSN-L
0195-9131
Statut éditorial
Publié
Date de publication
2014
Peer-reviewed
Oui
Volume
46
Numéro
6
Pages
1140-1146
Langue
anglais
Notes
Publication types: Journal Article ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
PURPOSE: Awareness of being monitored can influence participants' habitual physical activity (PA) behavior. This reactivity effect may threaten the validity of PA assessment. Reports on reactivity when measuring the PA of children and adolescents have been inconsistent. The aim of this study was to investigate whether PA outcomes measured by accelerometer devices differ from measurement day to measurement day and whether the day of the week and the day on which measurement started influence these differences.
METHODS: Accelerometer data (counts per minute [cpm]) of children and adolescents (n = 2081) pooled from eight studies in Switzerland with at least 10 h of daily valid recording were investigated for effects of measurement day, day of the week, and start day using mixed linear regression.
RESULTS: The first measurement day was the most active day. Counts per minute were significantly higher than on the second to the sixth day, but not on the seventh day. Differences in the age-adjusted means between the first and consecutive days ranged from 23 to 45 cpm (3.6%-7.1%). In preschoolchildren, the differences almost reached 10%. The start day significantly influenced PA outcome measures.
CONCLUSIONS: Reactivity to accelerometer measurement of PA is likely to be present to an extent of approximately 5% on the first day and may introduce a relevant bias to accelerometer-based studies. In preschoolchildren, the effects are larger than those in elementary and secondary schoolchildren. As the day of the week and the start day significantly influence PA estimates, researchers should plan for at least one familiarization day in school-age children and randomly assign start days.
Pubmed
Web of science
Création de la notice
04/07/2014 17:46
Dernière modification de la notice
03/03/2018 20:02
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