Cited by 120Physical Activity and HealthContext-Aware Activity Recognition SystemsPhysical Education and Training Studies

Comparison of two Actigraph models for assessing free-living physical activity in Indian adolescents

Corder, Kirsten, Brage, S⊘ren, Ramachandran, Ambady, Snehalatha, Chamukuttan, Wareham, Nicholas, Ekelund, Ulf·2007·Journal of Sports Sciences

Abstract

This aim of this study was to compare the new Actigraph (GT1M) with the widely used Model 7164. Seven days of free-living physical activity were measured simultaneously using both the Model 7164 and GT1M in 30 Indian adolescents (mean age 15.8 years, s = 0.6). The GT1M was on average 9% lower per epoch than model 7164, thus a correction factor of 0.91 is suggested for comparison between the two monitors. The differences between monitors increased in magnitude with intensity of activity (P < 0.001) but remained randomly distributed (r = 0.01, P = 0.96). No significant difference was observed between monitors for time spent in moderate (P = 0.31) and vigorous (P = 0.34) physical activity when using the same epoch length. The Model 7164 classified less time as sedentary (P < 0.001) and more time as light-intensity activity (P < 0.001) than the GT1M. In conclusion, data from the GT1M can be compared with historical data using average counts per minute with a correction factor, and the two models might be comparable for assessing time spent in moderate to vigorous physical activity in children when using the same epoch length.

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Crossref · 10.1080/02640410701283841

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Authors
Corder, K., Brage, S., Ramachandran, A., Snehalatha, C., Wareham, N., & Ekelund, U.
Affiliations
  • Addenbrooke's Hospital (GB)
  • MRC Epidemiology Unit (GB)
  • M.V. Hospital for Diabetes and Diabetes Research Centre (IN)
Corresponding author
Corder, Kirsten
Venue
Journal of Sports Sciences
Published
2007-12
Volume
25
Issue
14
Pages
1607-1611
ISSN
  • 0264-0414 (ISSN-L)
  • 1466-447X
OpenAlex
W1984764943
Cited by
120
References
10
Citations by year
2026: 1 · 2024: 1 · 2023: 3 · 2021: 5 · 2020: 5 · 2019: 2 · 2018: 3 · 2017: 5 · 2016: 6 · 2015: 4 · 2014: 8 · 2013: 13 · 2012: 24
FWCI
6.24
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Sports Sciences (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Physical Sciences › Computer Science › Computer Vision and Pattern Recognition › Context-Aware Activity Recognition Systems
  • Health Sciences › Health Professions › Physical Therapy, Sports Therapy and Rehabilitation › Physical Education and Training Studies
Keywords
ActiGraph GT1M, accelerometer comparison, free-living physical activity, adolescents, epoch length, activity intensity classification, sedentary time, moderate-to-vigorous physical activity, Indian adolescents
MeSH terms
Acceleration, Adolescent, Exercise Test, Female, Humans, India, Male, Models, Biological, Models, Theoretical, Monitoring, Physiologic, Motor Activity, Movement, Exercise, Monitoring, Ambulatory

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