Next Article in Journal
A Freezing-Thawing Damage Characterization Method for Highway Subgrade in Seasonally Frozen Regions Based on Thermal-Hydraulic-Mechanical Coupling Model
Previous Article in Journal
Simultaneous Absorbance and Fluorescence Measurements Using an Inlaid Microfluidic Approach
Previous Article in Special Issue
Review of Studies on Older Drivers’ Behavior and Stress—Methods, Results, and Outlook
Article

Validity, Reliability and Sensitivity to Change of Three Consumer-Grade Activity Trackers in Controlled and Free-Living Conditions among Older Adults

1
Andrej Marušič Institute, University of Primorska, Muzejski Trg 2, 6000 Koper, Slovenia
2
InnoRenew CoE, Livade 6, 6310 Izola, Slovenia
3
Faculty of Health Sciences, University of Primorska, Polje 42, 6310 Izola, Slovenia
4
Physiko-& Rheumatherapie, Institute for Physical Medicine and Rehabilitation, Neugebäudeplatz 1, 3100 St. Pölten, Austria
5
Ludwig Boltzmann Institute for Rehabilitation Research, Neugebäudeplatz 1, 3100 St. Pölten, Austria
6
Centre of Active Ageing—Competence Centre for Health, Prevention and Active Ageing, Neugebäudeplatz 1, 3100 St. Pölten, Austria
*
Author to whom correspondence should be addressed.
Academic Editors: Simone Tassani and Juan Ramírez
Sensors 2021, 21(18), 6245; https://doi.org/10.3390/s21186245
Received: 6 August 2021 / Revised: 5 September 2021 / Accepted: 13 September 2021 / Published: 17 September 2021
(This article belongs to the Special Issue Sensing for Healthy Ageing and Wellbeing)
Wrist-worn consumer-grade activity trackers are popular devices, developed mainly for personal use. This study aimed to explore the validity, reliability and sensitivity to change of movement behaviors metrics from three activity trackers (Polar Vantage M, Garmin Vivoactive 4s and Garmin Vivosport) in controlled and free-living conditions when worn by older adults. Participants (n = 28; 74 ± 5 years) underwent a videotaped laboratory protocol while wearing all three trackers. On a separate occasion, participants (n = 17 for each of the trackers) wore one (randomly assigned) tracker and a research-grade activity monitor ActiGraph wGT3X-BT simultaneously for six consecutive days. Both Garmin trackers showed excellent performance for step counts, with a mean absolute percentage error (MAPE) below 20% and intraclass correlation coefficient (ICC2,1) above 0.90 (p < 0.05). The MAPE for sleep time was within 10% for all the trackers tested, while it was far beyond 20% for all other movement behaviors metrics. The results suggested that all three trackers could be used for measuring sleep time with a high level of accuracy, and both Garmin trackers could also be used for step counts. All other output metrics should be used with caution. The results provided in this study could be used to guide choice on activity trackers aiming for different purposes—individual use, longitudinal monitoring or in clinical trial setting. View Full-Text
Keywords: healthy aging; fitness tracker; daily activity behaviors; physical behaviors; physical activity; sedentary behavior; sleep; responsiveness; comparison; mHealth healthy aging; fitness tracker; daily activity behaviors; physical behaviors; physical activity; sedentary behavior; sleep; responsiveness; comparison; mHealth
Show Figures

Figure 1

MDPI and ACS Style

Kastelic, K.; Dobnik, M.; Löfler, S.; Hofer, C.; Šarabon, N. Validity, Reliability and Sensitivity to Change of Three Consumer-Grade Activity Trackers in Controlled and Free-Living Conditions among Older Adults. Sensors 2021, 21, 6245. https://doi.org/10.3390/s21186245

AMA Style

Kastelic K, Dobnik M, Löfler S, Hofer C, Šarabon N. Validity, Reliability and Sensitivity to Change of Three Consumer-Grade Activity Trackers in Controlled and Free-Living Conditions among Older Adults. Sensors. 2021; 21(18):6245. https://doi.org/10.3390/s21186245

Chicago/Turabian Style

Kastelic, Kaja, Marina Dobnik, Stefan Löfler, Christian Hofer, and Nejc Šarabon. 2021. "Validity, Reliability and Sensitivity to Change of Three Consumer-Grade Activity Trackers in Controlled and Free-Living Conditions among Older Adults" Sensors 21, no. 18: 6245. https://doi.org/10.3390/s21186245

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop