Universidad de La Frontera, Temuco, Chile.
Queensland University of Technology, Brisbane, Australia.
Cad Saude Publica. 2021 Feb 22;37(2):e00240620. doi: 10.1590/0102-311X00240620. eCollection 2021.
The aim of this study was to compare self-reported with two accelerometer-derived methods to classify Chilean children and adolescents as physically active. In total, 247 students wore an accelerometer on their hips during 7 consecutive days to classify them as physically active based on (1) daily accumulation of ≥ 60 minutes of moderate-to-vigorous physical activity (MVPA) on each of the seven days, and (2) average MVPA ≥ 60 minutes/day. Also, participants were classified as physically active if they reported being active for at least 60 minutes in all seven days. When using the accelerometer data, 0.8% were active in all seven days, while 10.5% recorded ≥ 60 minutes MVPA per day on average. Based on self-report, 7.2% were physically active. The agreement between self-reported and accelerometer estimations were poor. Important differences were observed between the self-reported and device-derived methods for classifying children and adolescents as physically active. When comparing them, some considerations should be taken. The findings suggest that these methods are not interchangeable. Therefore, if possible, they should be used as complementary measurements.
本研究旨在比较自我报告与两种加速度计衍生方法，以将智利儿童和青少年分类为活跃。共有 247 名学生在臀部佩戴加速度计，连续 7 天，根据（1）每天积累≥60 分钟的中度到剧烈体力活动（MVPA），和（2）平均 MVPA≥60 分钟/天来分类为活跃。此外，如果参与者报告在所有 7 天都活跃至少 60 分钟，也将其归类为活跃。使用加速度计数据时，有 0.8%的人在所有 7 天都活跃，而 10.5%的人平均每天记录≥60 分钟的 MVPA。根据自我报告，有 7.2%的人是活跃的。自我报告和加速度计估计之间的一致性较差。在将儿童和青少年分类为活跃时，自我报告和设备衍生方法之间观察到重要差异。在比较它们时，应该考虑一些因素。研究结果表明，这些方法不能互换。因此，如果可能，它们应该作为补充测量使用。
