Department of Sports Science, German University of Health & Sport, 85737 Ismaning, Germany.
Somnolab, 44263 Dortmund, Germany.
Sensors (Basel). 2021 Dec 28;22(1):180. doi: 10.3390/s22010180.
Options for monitoring sports have been continuously developed by using activity trackers to determine almost all vital and movement parameters. The aim of this study was to validate heart rate and distance measurements of two activity trackers (Polar Ignite; Garmin Forerunner 945) and a cellphone app (Polar Beat app using iPhone 7 as a hardware platform) in a cross-sectional field study. Thirty-six moderate endurance-trained adults (20 males/16 females) completed a test battery consisting of walking and running 3 km, a 1.6 km interval run (standard 400 m outdoor stadium), 3 km forest run (outdoor), 500/1000 m swim and 4.3/31.5 km cycling tests. Heart rate was recorded via a Polar H10 chest strap and distance was controlled via a map, 400 m stadium or 50 m pool. For all tests except swimming, strong correlation values of r > 0.90 were calculated with moderate exercise intensity and a mean absolute percentage error of 2.85%. During the interval run, several significant deviations ( < 0.049) were observed. The swim disciplines showed significant differences ( < 0.001), with the 500 m test having a mean absolute percentage error of 8.61%, and the 1000 m test of 55.32%. In most tests, significant deviations ( < 0.001) were calculated for distance measurement. However, a maximum mean absolute percentage error of 4.74% and small mean absolute error based on the total route lengths were calculated. This study showed that the accuracy of heart rate measurements could be rated as good, except for rapid changing heart rate during interval training and swimming. Distance measurement differences were rated as non-relevant in practice for use in sports.
运动监测选项不断发展，使用活动追踪器来确定几乎所有的生命和运动参数。本研究的目的是验证两种活动追踪器（Polar Ignite；Garmin Forerunner 945）和一个手机应用程序（Polar Beat app 使用 iPhone 7 作为硬件平台）的心率和距离测量值，这是一项横断面现场研究。36 名中等耐力训练的成年人（20 名男性/16 名女性）完成了一个测试组合，包括步行和跑步 3 公里、1.6 公里间歇跑（标准 400 米室外体育场）、3 公里森林跑（室外）、500/1000 米游泳和 4.3/31.5 公里自行车测试。心率通过 Polar H10 胸带记录，距离通过地图、400 米体育场或 50 米游泳池控制。除游泳外，所有测试的相关系数 r 均>0.90，运动强度适中，平均绝对百分比误差为 2.85%。在间歇跑中，观察到几个显著偏差（<0.049）。游泳项目显示出显著差异（<0.001），500 米测试的平均绝对百分比误差为 8.61%，1000 米测试的平均绝对百分比误差为 55.32%。在大多数测试中，距离测量的偏差（<0.001）显著。然而，基于总路线长度，计算出的最大平均绝对百分比误差为 4.74%，平均绝对误差较小。本研究表明，除了间歇训练和游泳时心率的快速变化外，心率测量的准确性可以评为良好。在实践中，距离测量的差异被评为与使用运动无关。
