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  • Title: Reliability of Using Motion Sensors to Measure Children's Physical Activity Levels in Exergaming.
    Author: Zeng N, Gao X, Liu Y, Lee JE, Gao Z.
    Journal: J Clin Med; 2018 May 02; 7(5):. PubMed ID: 29724038.
    Abstract:
    OBJECTIVES: This study examined the reliability of two objective measurement tools in assessing children&rsquo;s physical activity (PA) levels in an exergaming setting. METHODS: A total of 377 children (190 girls, Mage = 8.39, SD = 1.55) attended the 30-min exergaming class every other day for 18 weeks. Children&rsquo;s PA levels were concurrently measured by NL-1000 pedometer and ActiGraph GT3X accelerometer, while children&rsquo;s steps per min and time engaged in sedentary, light, and moderate-to-vigorous PA were estimated, respectively. RESULTS: The results of intraclass correlation coefficient (ICC) indicated a low degree of reliability (single measures ICC = 0.03) in accelerometers. ANOVA did detect a possible learning effect for 27 classes (p < 0.01), and the single measures ICC was 0.20 for pedometers. Moreover, there was no significant positive relationship between steps per min and time spent in moderate-to-vigorous physical activity (MVPA). Finally, only 1.3% variance was explained by pedometer as a predictor using Hierarchical Linear Modeling to further explore the relationship between pedometer and accelerometer data. CONCLUSIONS: The NL-1000 pedometers and ActiGraph GT3X accelerometers have low reliability in assessing elementary school children&rsquo;s PA levels during exergaming. More research is warranted in determining the reliable and accurate measurement information regarding the use of modern devices in exergaming setting.
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