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Cited by 1,317Physical Activity and HealthContext-Aware Activity Recognition SystemsCardiovascular and exercise physiology

The DOI matches its Crossref record; 16 of the 17 references it cites were found in a registry or an index.

Validation and comparison of ActiGraph activity monitors

Sasaki, Jeffer E., John, Dinesh, Freedson, Patty S.·2011·Journal of Science and Medicine in Sport
DOI 10.1016/j.jsams.2011.04.003
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Abstract

Objective To compare activity counts from the ActiGraph GT3X to those from the ActiGraph GT1M during treadmill walking/running. A secondary aim was to develop tri-axial vector magnitude (VM3) cut-points to classify physical activity (PA) intensity.Methods Fifty participants wore the GT3X and the GT1M on the non-dominant hip and exercised at 4 treadmill speeds (4.8, 6.4, 9.7, and 12 km h(-1)). Vertical (VT) and antero-posterior (AP) activity counts (counts min(-1)) as well as the vector magnitudes of the two axes (VM2) from both monitors were tested for significant differences using two-way ANOVA's. Bland-Altman plots were used to assess agreement between activity counts from the GT3X and GT1M. Linear regression analysis between VM3 countsmin(-1) and oxygen consumption data was conducted to develop VM3 cut-points for moderate, hard and very hard PA.Results There were no significant inter-monitor differences in VT activity counts at any speed. AP and VM2 activity counts from the GT1M were significantly higher (p<0.01) than those from the GT3X at 4.8, 9.7 and 12 km h(-1). High inter-monitor agreement was found for VT activity counts but not for AP and VM2 activity counts. VM3 cut-points for moderate, hard, and very hard PA intensities were 2690-6166, 6167-9642, >9642 counts min(-1).Conclusion Due to the lack of congruence between the AP and VM2 activity counts from the GT1M and the GT3X, comparisons of data obtained with these two monitors should be avoided when using more than just the VT axis. VM3 cut-points may be used to classify PA in future studies.

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Metadata

Authors
Sasaki, J. E., John, D., & Freedson, P. S.
Affiliations
University of Massachusetts Amherst (US)
Corresponding author
Freedson, Patty S.
ORCID
Venue
Journal of Science and Medicine in Sport
Publisher
Elsevier BV
Published
2011-09
Volume
14
Issue
5
Pages
411-416
ISSN
1440-2440 (ISSN-L)
DOI
10.1016/j.jsams.2011.04.003
OpenAlex
W2042283868
Cited by
1,317
References
17
Citations by year
2026: 63 · 2025: 91 · 2024: 112 · 2023: 99 · 2022: 123 · 2021: 127 · 2020: 141 · 2019: 135 · 2018: 94 · 2017: 70 · 2016: 68 · 2015: 60 · 2014: 55 · 2013: 52 · 2012: 22
FWCI
28.58
Type
journal article
Language
en
Open access
closed
Licence
www.elsevier.com/tdm/userlicense/1.0/ (tdm)
Locations
  • Journal of science and medicine in sport (publishedVersion)
  • PubMed (publishedVersion)
  • ScholarWorks@UMassAmherst (University of Massachusetts Amherst) (submittedVersion)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Physical Activity and Health
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
  • Health Sciences › Medicine › Physiology (medical) › Cardiovascular and exercise physiology
Keywords
ActiGraph GT3X+, ActiGraph GT1M, triaxial accelerometry, treadmill walking and running, physical activity intensity classification, oxygen consumption, activity counts
MeSH terms
Adult, Exercise Test, Female, Humans, Male, Oxygen Consumption, Running, Walking, Monitoring, Ambulatory, Young Adult

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