Hazell Tom J, Ellery Caitlin V L, Cohen Tamara R, Vanstone Catherine A, Rodd Celia J, Weiler Hope A
Department of Kinesiology and Physical Education, Wilfrid Laurier University, Waterloo, Ontario, Canada.
School of Dietetics and Human Nutrition, McGill University, Montreal, Québec, Canada.
Pediatr Res. 2016 Nov;80(5):686-692. doi: 10.1038/pr.2016.133. Epub 2016 Jun 24.
Currently, there is a limited amount of research exploring physical activity measurement tools in overweight and obese (OW/OB) children using pedometers. Thus, our objective was to determine the accuracy of one spring-levered (SC-T2) and two piezoelectric pedometers (NL-1000 and Piezo) in OW/OB children.
A total of 26 boys and 34 girls (n = 60) participated. Pedometer step-counts were compared to observed step counts for walking (walking, stair ascent and decent) and hopping tests. Pedometer accuracies were compared with Friedman tests while Bland-Altman plots were used to establish the accuracy of each pedometer against direct observations.
Boys (n = 26) and females (n = 34) were 96 and 91% OB, respectively. The two piezoelectric pedometers (NL-1000 and Piezo) were accurate for walking and stair climbing tasks, however all pedometers were inaccurate for hopping tests. Averaged over all three walking activities, the NL-1000 was the most accurate with 6.7% median error (interquartile range (IQR): 0.0-13.3); followed by the Piezo with 10.0% median error (IQR: 3.3-18.1); SC-T2 was the least accurate with -14.7% median error (IQR: -54.8-3.5).
These results support the use of the piezoelectric pedometers for walking and stair climbing types of activities, which are typical for OW/OB children in a nonlaboratory setting.
目前，使用计步器对超重和肥胖（OW/OB）儿童的身体活动测量工具进行探索的研究数量有限。因此，我们的目标是确定一种弹簧杠杆式（SC-T2）和两种压电式计步器（NL-1000和Piezo）在OW/OB儿童中的准确性。
共有26名男孩和34名女孩（n = 60）参与。将计步器的步数与步行（行走、上下楼梯）和单脚跳测试中观察到的步数进行比较。使用Friedman检验比较计步器的准确性，同时使用Bland-Altman图根据直接观察结果确定每个计步器的准确性。
男孩（n = 26）和女孩（n = 34）的肥胖率分别为96%和91%。两种压电式计步器（NL-1000和Piezo）在步行和爬楼梯任务中是准确的，然而所有计步器在单脚跳测试中都不准确。在所有三项步行活动中平均计算，NL-1000最准确，中位数误差为6.7%（四分位间距（IQR）：0.0 - 13.3）；其次是Piezo，中位数误差为10.0%（IQR：3.3 - 18.1）；SC-T2最不准确，中位数误差为 - 14.7%（IQR： - 54.8 - 3.5）。
这些结果支持在非实验室环境中，对于OW/OB儿童典型的步行和爬楼梯类型的活动使用压电式计步器。
