Accelerometry to measure physical activity in toddlers: Determination of wear time requirements for a reliable estimate of physical activity

Journal of Sports Sciences
Michèle BissonIsabelle Marc

Abstract

Accelerometry is widely used to evaluate physical activity in toddlers however recommendations regarding wear time are needed to understand physical activity behaviours in this age group. This study aimed to determine the minimum wear time to reliably evaluate physical activity in toddlers. Children from the 3D Birth Cohort (n = 255, 49.8% boys, 2.1 ± 0.2 years) were asked to wear an accelerometer (GT3X+, ActiGraph) for 7 days. Physical activity was expressed in active time (min/day) and counts per minute (CPM). Single day intraclass correlation coefficients (ICCs) were calculated to assess the effect of varying minimal wear time on reliability estimates. The Spearman-Brown formula was used to determine wear time required to achieve reliability levels of 70%, 80% and 90%. For active time, a reliability of 72.1% was achieved with wearing the accelerometer for ≥ 4 days of ≥ 6 h, which comprised 85.9% of the sample. For CPM, ≥ 4 days of ≥ 6 h provided a reliability of 74.7% and comprised 85.9% of the children. Results differed slightly when girls and boys were analysed separately, but restricting analyses to children with a weekend day did not. In summary, a minimum of 4 days with ≥ 6 h of accelerometry data provides a reliable es...Continue Reading

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Citations

Mar 24, 2020·Journal of Sports Sciences·Eivind AadlandSigmund Alfred Anderssen
Nov 7, 2019·International Journal of Environmental Research and Public Health·Soyang KwonMaryann Mason
Feb 8, 2020·The International Journal of Behavioral Nutrition and Physical Activity·Brianne A BruijnsPatricia Tucker
Jan 21, 2021·Childhood Obesity·Chelsea L KrachtAline Andres
Aug 8, 2021·International Journal of Environmental Research and Public Health·Aliye B CepniTracey A Ledoux

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