Montes Jeffrey, Tandy Richard, Young John, Lee Szu-Ping, Navalta James W
Department of Kinesiology and Nutrition Sciences, University of Nevada, Las Vegas, Las Vegas, NV, USA.
Int J Exerc Sci. 2020 May 1;13(7):410-426. doi: 10.70252/IZMD1804. eCollection 2020.
Wearable technology devices are used by millions of people who use daily step counts to promote healthy lifestyles. However, the accuracy of many of these devices has not been determined. The purpose was to determine reliability and validity of the Samsung Gear 2, FitBit Surge, Polar A360, Garmin Vivosmart HR+, and the Leaf Health Tracker when walking and jogging in free motion and treadmill conditions. Forty volunteers completed walking and jogging free motion and treadmill protocols of 5-minute intervals. The devices were worn simultaneously in randomized configurations. The mean of two manual steps counters was used as the criterion measure. Test-retest reliability was determined via Intraclass Correlation Coefficient (ICC). Validity was determined via a combination of Pearson's Correlation Coefficient, mean absolute percent error (MAPE: free motion ≤ 10.0%, treadmill ≤ 5.00%), and Bland-Altman analysis (device bias and limits of agreement). Significance was set at < 0.05. The Samsung Gear 2 was deemed to be both reliable and valid for the jogging conditions, but not walking. The Fitbit Surge was reliable and valid for all conditions except for treadmill walking (deemed reliable, ICC = 0.76; but not valid). The Polar A360 was found to be reliable for one condition (treadmill jog ICC = 0.78), but not valid for any condition. The Garmin Vivosmart HR+ and Leaf Health Tracker were found to be both reliable and valid for all situations. While each device returned some level of consistency and accuracy during either free motion or treadmill exercises, the Garmin Vivosmart HR+ and the Leaf Health Tracker were deemed to be reliable and valid for all conditions tested.
数以百万计的人使用可穿戴技术设备，通过每日步数计数来促进健康的生活方式。然而，其中许多设备的准确性尚未得到确定。本研究的目的是确定三星Gear 2、FitBit Surge、Polar A360、佳明Vivosmart HR+和Leaf健康追踪器在自由运动和跑步机条件下行走和慢跑时的可靠性和有效性。40名志愿者完成了5分钟间隔的自由运动和跑步机行走及慢跑方案。这些设备以随机配置同时佩戴。将两个手动步数计数器的平均值用作标准测量值。通过组内相关系数（ICC）确定重测可靠性。通过皮尔逊相关系数、平均绝对百分比误差（MAPE：自由运动≤10.0%，跑步机≤5.00%）和布兰德-奥特曼分析（设备偏差和一致性界限）的组合来确定有效性。显著性设定为<0.05。三星Gear 2在慢跑条件下被认为既可靠又有效，但在行走时则不然。FitBit Surge在除跑步机行走外的所有条件下都是可靠且有效的（被认为可靠，ICC = 0.76；但无效）。发现Polar A360在一种条件下（跑步机慢跑，ICC = 0.78）可靠，但在任何条件下均无效。发现佳明Vivosmart HR+和Leaf健康追踪器在所有情况下都既可靠又有效。虽然每个设备在自由运动或跑步机运动期间都返回了一定程度的一致性和准确性，但佳明Vivosmart HR+和Leaf健康追踪器在所有测试条件下都被认为是可靠且有效的。
