Physical activity monitoring in extremely obese adolescents from the Teen-LABORATORIES study.
Physical activity monitoring in extremely obese adolescents from the Teen-LABORATORIES study.
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青少年实验室研究中极度肥胖青少年的身体活动监测。
DOI：
10.1123/jpah.2013-0006
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发表时间：
2015
影响因子：
3.1
通讯作者：
Bray,MollyS
中科院分区：
文献类型：
--
作者：
Jeffreys,ReneeM;Inge,ThomasH;Jenkins,ToddM;King,WendyC;Oruc,Vedran;Douglas,AndrewD;Bray,MollyS
背景：身体活动（PA）监测仪在区分极肥胖（EO）青少年的PA、久坐行为和不穿衣服方面的准确性尚不清楚。方法25名受试者（男9例，女16例;年龄16.5±2.0岁; BMI=51±8 kg/m2）佩戴3种活动监测仪（StepWatch [SAM]、Actical [AC]、Actiheart [AH]）进行400米步行试验（400 MWT）、2次不同持续时间的标准PA发作和1次久坐发作。结果对于400 MWT，SAM和AC步长的观察步长和监测器记录步长之间的百分比误差分别为5.5±7.1%和82.1±38.6%（观察步长与SAM步长：−17.2±22.2步;观察步长与AC步长：−264.5±124.8步）。所有活动监测器都能够区分PA和久坐发作，但只有SAM步数和AH心率在久坐行为和非佩戴之间存在显著差异（p<0.001）。对于所有监测器，久坐行为的特征是间歇性活动步数/计数中断的零步数/计数;非磨损几乎完全由零步数/计数表示。结论在所有测试的监测器中，SAM在计数步数和区分PA水平方面是最准确的，因此最适合于EO青少年。准确描述EO青少年PA强度的能力主要取决于活动监测器的选择。
Background The accuracy of physical activity (PA) monitors to discriminate between PA, sedentary behavior, and non-wear in extremely obese (EO) adolescents is unknown. Methods Twenty-five subjects (9 male/16 female; age=16.5±2.0 y; BMI=51±8 kg/m2) wore three activity monitors (StepWatch [SAM], Actical [AC], Actiheart [AH]) during a 400 meter walk test (400MWT), two standardized PA bouts of varying duration, and one sedentary bout. Results For the 400MWT, percent error between observed and monitor recorded steps was 5.5±7.1% and 82.1±38.6% for the SAM and AC steps, respectively (observed vs. SAM steps: −17.2±22.2 steps; observed vs. AC steps: −264.5±124.8 steps). All activity monitors were able to differentiate between PA and sedentary bouts but only SAM steps and AH heart rate were significantly different between sedentary behavior and non-wear (p<0.001). For all monitors, sedentary behavior was characterized by bouts of zero steps/counts punctuated by intermittent activity steps/counts; non-wear was represented almost exclusively by zero steps/counts. Conclusion Of all monitors tested, the SAM was most accurate in terms of counting steps and differentiating levels of PA, and thus, most appropriate for EO adolescents. The ability to accurately characterize PA intensity in EO adolescents critically depends on activity monitor selection.
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