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Concurrent Validity of the Garmin Vivofit®4 to Accurately Record Step Count in Older Adults in Challenging Environments.

Authors
  • Foster, Jacinta I1, 2
  • Williams, Katrina L1
  • Timmer, Barbra H B1, 3
  • Brauer, Sandra G1
  • 1 School of Health and Rehabilitation Sciences, The University of Queensland, St Lucia, QLD,Australia. , (Australia)
  • 2 Logan Hospital, Metro South Health Service, Meadowbrook, QLD,Australia. , (Australia)
  • 3 Sonova AG, Stafa,Switzerland. , (Switzerland)
Type
Published Article
Journal
Journal of aging and physical activity
Publication Date
Oct 01, 2022
Volume
30
Issue
5
Pages
833–841
Identifiers
DOI: 10.1123/japa.2021-0231
PMID: 34996032
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

There is little evidence of the concurrent validity of commercially available wrist-worn long battery life activity monitors to measure steps in older adults at slow speeds and with real-world challenges. Forty adults aged over 60 years performed a treadmill protocol at four speeds, a 50-m indoor circuit, and a 200-m outdoor circuit with environmental challenges while wearing a Garmin Vivofit®4, the activPAL3™, and a chest-worn camera angled at the feet. The Garmin Vivofit®4 showed high intraclass correlation coefficients2,1 (.98-.99) and low absolute percentage error rates (<2%) at the fastest treadmill speeds and the outdoor circuit. Step counts were underestimated at the slowest treadmill speed and the indoor circuit. The Garmin Vivofit®4 is accurate for older adults at higher walking speeds and during outdoor walking. However, it underestimates steps at slow speeds and when walking indoors with postural transitions.

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