Hosseinalizadeh Mohammad, Asghari Mehran, Toosizadeh Nima
Department of Biomedical Engineering, School of Graduate Studies, Rutgers University, Newark, NJ 07107, USA.
Department of Rehabilitation and Movementformul Sciences, School of Health Professions, Rutgers University, Newark, NJ 07107, USA.
Sensors (Basel). 2024 Dec 7;24(23):7827. doi: 10.3390/s24237827.
This study evaluated the reliability of Fitbit in assessing frailty based on motor and heart rate (HR) parameters through a validated upper extremity function (UEF) test, which involves 20 s of rapid elbow flexion. For motor performance, participants completed six trials of full elbow flexion using their right arm, with and without weight. Fitbit and a commercial motion sensor were worn on the right arm. For HR measurements, an ECG system was placed on the left chest alongside the Fitbit on the left wrist. Motor parameters assessing speed, flexibility, weakness, exhaustion, and HR before, during, and after UEF were measured. A total of 42 participants (age = 22 ± 3) were recruited. For motor parameters, excellent agreement was observed between the wearable sensor and Fitbit, except for flexibility (ICC = 0.87 ± 0.09). For HR parameters, ICC values showed weak agreement between ECG and Fitbit for HR increase and recovery (ICC = 0.24 ± 0.11), while moderate to stronger agreement was seen for mean HR during baseline, task, and post-task (ICC = 0.81 ± 0.13). Fitbit is a reliable tool for assessing frailty through motor parameters and provides reasonably accurate HR estimates during baseline, task, and recovery periods. However, Fitbit's ability to track rapid HR changes during activity is limited.
本研究通过一项经过验证的上肢功能（UEF）测试，评估了Fitbit基于运动和心率（HR）参数评估虚弱程度的可靠性，该测试包括20秒的快速屈肘动作。对于运动表现，参与者使用右臂完成了六次全肘屈曲试验，分别是有负重和无负重的情况。Fitbit和一个商用运动传感器佩戴在右臂上。对于心率测量，一个心电图系统放置在左胸，同时Fitbit佩戴在左手腕。测量了评估UEF之前、期间和之后的速度、灵活性、力量、疲劳以及心率的运动参数。总共招募了42名参与者（年龄 = 22 ± 3）。对于运动参数，除了灵活性（组内相关系数[ICC] = 0.87 ± 0.09）外，可穿戴传感器和Fitbit之间观察到了极好的一致性。对于心率参数，在心率增加和恢复方面，心电图和Fitbit之间的ICC值显示出较弱的一致性（ICC = 0.24 ± 0.11），而在基线、任务期间和任务后平均心率方面观察到了中度到较强的一致性（ICC = 0.81 ± 0.13）。Fitbit是通过运动参数评估虚弱程度的可靠工具，并且在基线、任务和恢复期间能提供合理准确的心率估计。然而，Fitbit追踪活动期间快速心率变化的能力有限。
