Comprehensive comparison of Apple Watch and Fitbit monitors in a free-living setting.
Comprehensive comparison of Apple Watch and Fitbit monitors in a free-living setting.
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DOI：
10.1371/journal.pone.0251975
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发表时间：
2021
期刊：
影响因子：
3.7
通讯作者：
Byun W
中科院分区：
文献类型：
--
作者：
Bai Y;Tompkins C;Gell N;Dione D;Zhang T;Byun W
这项研究的目的是评估三种基于消费者的活动监测器的准确性，Fitbit Charge 2，Fitbit阿尔塔和Apple Watch 2，都戴在手腕上，在自由生活环境中估计步数，中度到剧烈分钟（MVPA）和心率。要求48名参与者（31名女性，17名男性;年龄18-59岁）在手腕上佩戴上述三种基于消费者的监护仪，同时使用Yamax计步器作为步数标准，ActiGraph GT 3X+（ActiGraph）用于MVPA，Polar H7胸带用于心率。参与者戴着监视器进行24小时的自由生活，而不改变他们通常的活动日程。MVPA以≥10分钟的发作计算。Pearson相关性、平均绝对误差百分比（MAPE）和等效性检验用于评估测量一致性。每台器械记录的平均步数如下：11，734（Charge 2）、11，922（阿尔塔）、11，550（Apple 2）和10，906（Yamax）。上述监测器的步长相关性范围为0.84 - 0.95，MAPE范围为17.1%-35.5%。对于MVPA分钟数，平均为76.3（Charge 2）、63.3（阿尔塔）、49.5（Apple 2）和47.8（ActiGraph）分钟数，累积10分钟或更长时间。上述监测器的MVPA估计的相关性分别为0.77、0.91和0.66。与ActiGraph相比，MVPA估计的MAPE范围为44.7%至55.4%。对于心率，Charge 2和Apple 2与久坐行为的相关性较高，而与MVPA的相关性较低。MAPE范围为4%至16%。所有三个消费者监测估计步数相当准确，充电2和苹果2报告合理的心率估计。然而，所有监测人员都大大低估了自由生活环境中的MVPA。
The aim of this study was to evaluate the accuracy of three consumer-based activity monitors, Fitbit Charge 2, Fitbit Alta, and the Apple Watch 2, all worn on the wrist, in estimating step counts, moderate-to-vigorous minutes (MVPA), and heart rate in a free-living setting. Forty-eight participants (31 females, 17 males; ages 18–59) were asked to wear the three consumer-based monitors mentioned above on the wrist, concurrently with a Yamax pedometer as the criterion for step count, an ActiGraph GT3X+ (ActiGraph) for MVPA, and a Polar H7 chest strap for heart rate. Participants wore the monitors for a 24-hour free-living condition without changing their usual active routine. MVPA was calculated in bouts of ≥10 minutes. Pearson correlation, mean absolute percent error (MAPE), and equivalence testing were used to evaluate the measurement agreement. The average step counts recorded for each device were as follows: 11,734 (Charge2), 11,922 (Alta), 11,550 (Apple2), and 10,906 (Yamax). The correlations in steps for the above monitors ranged from 0.84 to 0.95 and MAPE ranged from 17.1% to 35.5%. For MVPA minutes, the average were 76.3 (Charge2), 63.3 (Alta), 49.5 (Apple2), and 47.8 (ActiGraph) minutes accumulated in bouts of 10 or greater minutes. The correlation from MVPA estimation for above monitors were 0.77, 0.91, and 0.66. MAPE from MVPA estimation ranged from 44.7% to 55.4% compared to ActiGraph. For heart rate, correlation for Charge2 and Apple2 was higher for sedentary behavior and lower for MVPA. The MAPE ranged from 4% to 16%. All three consumer monitors estimated step counts fairly accurately, and both the Charge2 and Apple2 reported reasonable heart rate estimation. However, all monitors substantially underestimated MVPA in free-living settings.
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3.7
作者：
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