NDLI: Week-to-week differences of children's habitual activity and postural allocation as measured by the ActivPAL monitor.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hinckson, Erica A. Hopkins, Will G. Aminian, Saeideh Ross, Kara
Spatial Coverage	New Zealand
Description	Author Affiliation: Hinckson EA ( Centre for Physical Activity and Nutrition, Centre for Child Health Research, Institute of Public Health and Mental Health, Auckland University of Technology, Private Bag 92006, Auckland, New Zealand. Electronic address: erica.hinckson@aut.ac.nz.)
Abstract	BACKGROUND: Quantification of sitting and standing is possible with the ActivPAL accelerometer, using algorithms to classify activity into time spent sitting, standing and stepping. The purpose of this study was to determine children's week-to-week differences in time spent sitting/lying and standing along with other measures as provided by the ActivPAL accelerometer during continuous wearing of the ActivPAL monitor. METHODS: Fifty-six children (age 10.2±0.9 years, mean±SD) were recruited from 30 urban schools in Auckland, New Zealand. Children wore the monitor for 24h per day up to 14 days. Analyses were performed with mixed modeling. Reliability was expressed as change in the mean from week to week, intraclass correlation coefficient (ICC) and standard error of measurement (SEM). RESULTS: Mean week-to-week differences in percent time spent sitting/lying, standing and stepping on week days and weekend days for girls and boys were typically small. Step and sit-to-stand counts differences were small and unclear respectively. ICC values ranged from 0.40 to 0.79 during week days and 0.25-0.60 during weekends. SEM for time spent sitting/lying, standing and stepping were â¼3.5%, â¼2.5% and â¼1.5% respectively. CONCLUSION: The ActivPAL showed moderate to low week-to-week reliability for habitual activity and postural allocation under free living conditions in boys and girls. Interventions aimed at a moderate reduction in sitting time (â¼5% of the day) will require modest sample sizes for adequate precision.
File Format	HTM / HTML
ISSN	09666362
Issue Number	4
Volume Number	38
e-ISSN	18792219
Journal	Gait & Posture
Language	English
Publisher	Elsevier
Publisher Date	2013-09-01
Publisher Place	Great Britain (UK)
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Research Support, Non-u.s. Gov't Discipline Orthopedics Humans Instrumentation Male Sedentary Lifestyle Motor Activity Activities Of Daily Living Journal Article Monitoring, Ambulatory Posture New Zealand Reproducibility Of Results Algorithms Female Physiology Child Accelerometry
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Rehabilitation Biophysics Sports Science

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