Hargens Trent A, Deyarmin Kayla N, Snyder Kelsey M, Mihalik Allison G, Sharpe Lauren E
a Department of Kinesiology , Human Performance Laboratory, James Madison University , Harrisonburg , VA , USA.
J Med Eng Technol. 2017 Apr;41(3):200-207. doi: 10.1080/03091902.2016.1271046. Epub 2017 Jan 12.
Current recommendations state that individuals engage in 150 min of moderate or 75 min of vigorous intensity physical activity (PA) each week. Commercial PA monitors are becoming popular for everyday use. The accuracy of these devices, however, is not well understood. We sought to examine the accuracy of two commercial devices, one wrist and one hip-worn, under free-living conditions.
Twenty-two subjects wore two commercially available devices and one ActiGraph (AG) for seven consecutive days under normal activity.
Mean steps per day between all three devices differed significantly. No differences were found in moderate-to-vigorous intensity physical activity (MPVA). Daily energy expenditure (EE) also differed significantly between the AG and the commercial devices. Bland-Altman analysis found poor agreement between the AG and the commercial devices with regards to steps and EE, but good agreement in MVPA.
Results suggest that the commercial devices are less accurate in estimating steps and EE. These devices did show good agreement with regards to MVPA, suggesting that they may provide useful feedback for individuals seeking to achieve the current PA guidelines for MVPA. Improvements are needed with regards to steps and EE estimation.
当前建议指出，个体每周应进行150分钟中等强度或75分钟高强度体育活动（PA）。商业性PA监测器在日常使用中越来越受欢迎。然而，这些设备的准确性尚未得到充分了解。我们试图在自由生活条件下检验两种商业设备（一种戴在手腕上，一种戴在臀部）的准确性。
22名受试者在正常活动情况下连续七天佩戴两种市售设备和一台ActiGraph（AG）。
所有三种设备之间的日均步数差异显著。在中等至高强度体育活动（MPVA）方面未发现差异。AG与商业设备之间的每日能量消耗（EE）也存在显著差异。Bland-Altman分析发现，AG与商业设备在步数和EE方面的一致性较差，但在MVPA方面一致性良好。
结果表明，商业设备在估计步数和EE方面准确性较低。这些设备在MVPA方面确实显示出良好的一致性，这表明它们可能为寻求达到当前MVPA PA指南的个体提供有用的反馈。在步数和EE估计方面需要改进。
