Improving physical activity assessment in prepubertal children with high-frequency accelerometry monitoring: A methodological issue
Improving physical activity assessment in prepubertal children with high-frequency accelerometry monitoring: A methodological issue
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DOI：
10.1016/j.ypmed.2006.10.004
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发表时间：
2007-02-01
影响因子：
5.1
通讯作者：
Berthoin, Serge
中科院分区：
文献类型：
--
作者：
Baquet, Georges;Stratton, Gareth;Berthoin, Serge
客观的。本研究的目的是通过高频加速度监测来检查青春期前儿童的体力活动 (PA) 持续时间。方法。来自法国北部一所学校的 13 名男孩和 13 名女孩（8-10 岁）使用单轴 Actigraph 加速度计在 7 天内记录了他们的 PA。为了检查 PA 行为模式，纪元设置为 2 秒。计算每个强度级别的轻度 (LPA)、中度 (MPA)、剧烈 (VPA) 和极高 (VHPA) 强度活动所花费的时间以及不同持续时间（从 2 到 1200 秒）的每日 PA 发作次数。数据收集于 2004 年。结果。 PA 发作的平均持续时间为：LPA 为 70.8 +/- 13.2 秒，MPA 为 9.0 +/- 2.8 秒，VPA 为 4.7 +/- 1.2 秒，VHPA 为 3.9 +/- 1.6 秒。对于整个人群，80%的MPA、93%的VPA和96%的VEPA持续时间不到10秒。虽然 VPA 和 VHPA 花费的时间占 PA 总时间的 2.4%，但 VPA 和 VHPA 回合占 PA 总量的 36.1 +/- 5.8%。结论。儿童的 PA 模式无论其强度如何，都是高度短暂且间歇性的。通过与儿童行为相关的采样间隔来评估身体活动可能会提高我们对其 PA 模式的理解。 (c) 2006 Elsevier Inc. 保留所有权利。
Objective. The aim of this study was to examine the duration of physical activity (PA) bouts in prepubertal children with high-frequency accelerometry monitoring.Methods. Thirteen boys and thirteen girls (aged 8-10 years) from one school in North of France had their PA recorded during 7 days using a uniaxial Actigraph accelerometer. To examine PA behavior patterns, the epoch was set at 2 s. Times spent in light (LPA), moderate (MPA), vigorous (VPA) and very high (VHPA) intensity activity and the daily number of PA bouts of different durations (from 2 to 1200 s) were calculated for each intensity level. Data were collected in 2004.Results. The mean duration of PA bouts was 70.8 +/- 13.2 s for LPA, 9.0 +/- 2.8 s for MPA, 4.7 +/- 1.2 s for VPA and 3.9 +/- 1.6 s for VHPA. For the whole population, 80% of MPA, 93% of VPA and 96% of VEPA lasted less than 10 s. Although times spent in VPA and VHPA represented 2.4% of the total PA time, VPA and VHPA bouts accounted for 36.1 +/- 5.8% of the total amount of PA.Conclusion. Children's PA pattern is highly transitory and intermittent whatever its intensity. Physical activity assessed with a sampling interval related to children's behavior may improve our understanding of their PA patterns. (c) 2006 Elsevier Inc. All rights reserved.