Abstract
<jats:p>Background: The purpose of this study was to examine the convergent validity of the Polar Active Watch (PAW), a consumer-grade wrist-worn activity monitor, against waist- and wrist-worn research-grade monitors, the ActiGraph GT3X+/GT9X accelerometers, in children. Methods: Fifty-one children (18 boys; mean age = 10.30 ± 0.91 years) wore the three monitors (PAW, GT3X+, and GT9X) during an 80-min afterschool program across five school days. Time spent in sedentary, light-intensity (LPA), and moderate- and vigorous-intensity physical activity (MVPA) were estimated from each monitor. The correlation, mixed model, mean absolute percentage error, equivalence testing, and Bland-Altman analyses were used to examine the comparability of PA estimates of the PAW with GT3X+/GT9X accelerometers. Results: Moderate to strong correlations for sedentary and MVPA minutes, and weak correlation for LPA were observed between the PAW and GT3X+/GT9X accelerometers. Significant mean differences were
| Original language | English |
|---|---|
| Pages (from-to) | 2268 |
| Journal | International Journal of Environmental Research and Public Health |
| DOIs | |
| State | Published - Oct 2018 |
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Kim, Y., & Lochbaum, M. (2018). Comparison of Polar Active watch and waist- and wrist-worn ActiGraph accelerometers for measuring children’s physical activity levels during unstructured afterschool programs. International Journal of Environmental Research and Public Health, 2268. https://doi.org/10.3390/ijerph15102268