Moderate-to-vigorous physical activity among children: Discrepancies in accelerometry-based cut-off points
Moderate-to-vigorous physical activity among children: Discrepancies in accelerometry-based cut-off points
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DOI：
10.1038/oby.2006.89
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发表时间：
2006-05-01
期刊：
影响因子：
6.9
通讯作者：
Durocher, Alain
中科院分区：
文献类型：
--
作者：
Guinhouya, Comlavi B.;Hubert, Herve;Durocher, Alain
目的：根据 Puyau 等人的定义，强调中度至剧烈体力活动 (MVPA) 的加速度测量截止点的差异。 (MVPA(P)) 和 Trost 等人。 (MVPA(T))。 研究方法和程序：使用 ActiGraph (ActiGraph, LLC, Fort Walton Beach, FL) 连续 3 天监测 45 名 8 至 11 岁的儿童。使用变异性、回归和一致性统计数据，将使用 MVPAP 获得的每日花费在 MVPA 上的时间与使用 MVPAT 获得的每日时间进行比较。然后讨论关于体力活动建议的数据。结果：在 MVPAP 上花费的平均每日时间（28±18 分钟）显着低于在 MVPA(T) 上花费的平均每日时间（p < 10(-4)）（141 +/- 39 分钟）。两个定义之间的决定系数较低（R-2 = 0.49 +/- 0.71）。两个定义之间缺乏一致性，平均误差或偏差为 113 分钟/天。百分之三十四点八和 100% 的儿童分别接受了 30 分钟 MVPA/d 的 MVPA(P) 和 MVPA(T) 定义。讨论：致力于描述儿童身体活动或评估干预措施的研究之间的可比性可能缺乏根据定义的一致性，存在错误分类的真正风险。
Objective: To highlight the discrepancies in accelerometry cut-off points of moderate-to-vigorous physical activity (MVPA) according to the definitions of Puyau et al. (MVPA(P)) and Trost et al. (MVPA(T)).Research Methods and Procedures: Forty-five children from 8 to 11 years old were monitored with the ActiGraph (ActiGraph, LLC, Fort Walton Beach, FL) for 3 consecutive days. Daily time spent at MVPA obtained with MVPAP was compared with that obtained with MVPAT using variability, regression, and agreement statistics. Data were then discussed with regard to physical activity recommendations.Results: The mean daily time spent at MVPAP (28 18 minutes) was significantly lower (p < 10(-4)) than that spent at MVPA(T) (141 +/- 39 minutes). The coefficient of determination between the two definitions was low (R-2 = 0.49 +/- 0.71). There was a lack of agreement between the two definitions, with a mean error or bias of 113 min/d. Thirty-four point eight percent and 100% of children underwent 30-minute MVPA/d with MVPA(P) and MVPA(T) definitions, respectively.Discussion: Comparability between studies devoted to describing children's physical activity or to assessing interventions may lack consistency according to the definition, with a real risk of misclassification.