The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.
Comparison of two Actigraph models for assessing free-living physical activity in Indian adolescents
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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“the more recent Actigraph GT1M model has a consistent bias of 9% relative to model 7164,24”
From Timing of the decline in physical activity in childhood and adolescence: gateshead millennium cohort study (2018) · cites this paper as [24]
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Coyle-Asbil, H. J., Murphy, B., & Vallis, L. A. (2026) · Biomedical Signal Processing and Control · doi:10.1016/j.bspc.2026.109627
Metadata
- 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
- Publisher
- Informa UK Limited
- 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 › 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 › 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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