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Cited by 383

The DOI matches its Crossref record; 9 of the 9 references it cites were found in a registry or an index.

Actigraph GT3X: Validation and Determination of Physical Activity Intensity Cut Points

Open access
Santos-Lozano, A., Santín-Medeiros, F., Cardon, G., Torres-Luque, G., Bailón, R., Bergmeir, C., Ruiz, J., Lucia, A., Garatachea, N.·2013·International Journal of Sports Medicine
DOI 10.1055/s-0033-1337945
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Abstract

The aims of this study were: to compare energy expenditure (EE) estimated from the existing GT3X accelerometer equations and EE measured with indirect calorimetry; to define new equations for EE estimation with the GT3X in youth, adults and older people; and to define GT3X vector magnitude (VM) cut points allowing to classify PA intensity in the aforementioned age-groups. The study comprised 31 youth, 31 adults and 35 older people. Participants wore the GT3X (setup: 1-s epoch) over their right hip during 6 conditions of 10-min duration each: resting, treadmill walking/running at 3, 5, 7, and 9 km · h⁻¹, and repeated sit-stands (30 times · min⁻¹). The GT3X proved to be a good tool to predict EE in youth and adults (able to discriminate between the aforementioned conditions), but not in the elderly. We defined the following equations: for all age-groups combined, EE (METs)=2.7406+0.00056 · VM activity counts (counts · min⁻¹)-0.008542 · age (years)-0.01380 · body mass (kg); for youth, METs=1.546618+0.000658 · VM activity counts (counts · min⁻¹); for adults, METs=2.8323+0.00054 · VM activity counts (counts · min⁻¹)-0.059123 · body mass (kg)+1.4410 · gender (women=1, men=2); and for the elderly, METs=2.5878+0.00047 · VM activity counts (counts · min⁻¹)-0.6453 · gender (women=1, men=2). Activity counts derived from the VM yielded a more accurate EE estimation than those derived from the Y-axis. The GT3X represents a step forward in triaxial technology estimating EE. However, age-specific equations must be used to ensure the correct use of this device.

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Metadata

Authors
Santos-Lozano, A., Santín-Medeiros, F., Cardon, G., Torres-Luque, G., Bailón, R., Bergmeir, C., Ruiz, J., Lucia, A., & Garatachea, N.
Venue
International Journal of Sports Medicine
Publisher
Georg Thieme Verlag KG
Published
2013-05-22
Volume
34
Issue
11
Pages
975-982
ISSN
  • 0172-4622 (ISSN-L)
  • 1439-3964
DOI
10.1055/s-0033-1337945
OpenAlex
W2034757894
Cited by
383
References
9
FWCI
11.83
Type
journal article
Language
en
Open access
bronze

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