Reilly Caroline, Stavropoulos-Kalinoglou Antonis, Clifton Ian, McKenna Jim, Peckham Daniel, Price Oliver J
Clinical Exercise and Respiratory Physiology Research Group, Centre for Active Lifestyles, Carnegie School of Sport, Leeds Beckett University, Leeds, UK.
Leeds Institute of Medical Research at St. James's, University of Leeds, Leeds, UK.
J Asthma. 2022 May;59(5):967-975. doi: 10.1080/02770903.2021.1882487. Epub 2021 Feb 13.
The aim of this pilot validation study was to determine the accuracy of a smartphone (iPhone®) pedometer in adults with and without asthma.
Ten adults with asthma and ten healthy controls underwent clinical assessment prior to completing two separate trials. standardized treadmill and self-paced walking tests. Total steps were recorded via: (i) Yamax Digiwalker™ SW800 pedometer positioned on the waistband, (ii) iPhone® pedometer positioned on the upper body, (iii) iPhone® pedometer positioned on the lower body and evaluated against a video-verified manual step-count. step-count was evaluated over seven-days during habitual free-living conditions via Yamax Digiwalker™ SW800 and iPhone® pedometers.
During treadmill walking, the iPhone® positioned on the lower body correlated strongly ( = 0.96) and produced the highest level of agreement (mean bias: -11 steps, LOA: -43 to 21 steps) in comparison to video-verified manual step-count. During self-paced walking, all devices provided an excellent step-count estimate. During free-living conditions, no difference was observed between the Yamax Digiwalker™ SW800 pedometer and iPhone® ( = 0.10) and a strong correlation ( = 0.94) and acceptable agreement (mean bias: -343, LOA: -1963 to 1276 steps) was observed.
Our findings indicate that an in-built iPhone® pedometer offers a practical approach to physical activity assessment in adults with and without asthma. Future research is now required to further validate the precision of this approach and evaluate the efficacy and effectiveness of smartphone pedometers to monitor and promote physical activity when employed during medical consultation and/or clinical research trials.
本初步验证研究的目的是确定一款智能手机（苹果iPhone®）计步器在有哮喘和无哮喘成年人中的准确性。
10名患有哮喘的成年人和10名健康对照在完成两项独立试验（标准化跑步机测试和自定步速行走测试）之前接受了临床评估。通过以下方式记录总步数：（i）佩戴在腰带上的Yamax Digiwalker™ SW800计步器；（ii）佩戴在上半身的苹果iPhone®计步器；（iii）佩戴在下半身的苹果iPhone®计步器，并与视频验证的手动步数计数进行对比评估。通过Yamax Digiwalker™ SW800和苹果iPhone®计步器在习惯的自由生活条件下对步数进行为期七天的评估。
在跑步机行走期间，与视频验证的手动步数计数相比，佩戴在下半身的苹果iPhone®计步器相关性很强（r = 0.96），并且一致性水平最高（平均偏差：-11步，一致性界限：-43至21步）。在自定步速行走期间，所有设备都提供了出色的步数估计。在自由生活条件下，未观察到Yamax Digiwalker™ SW800计步器与苹果iPhone®计步器之间存在差异（r = 0.10），观察到强相关性（r = 0.94）和可接受的一致性（平均偏差：-343，一致性界限：-1963至1276步）。
我们的研究结果表明，苹果iPhone®内置计步器为有哮喘和无哮喘的成年人提供了一种实用的身体活动评估方法。现在需要进一步的研究来进一步验证这种方法的精确性，并评估智能手机计步器在医疗咨询和/或临床研究试验中用于监测和促进身体活动时的功效和有效性。
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