Journal article
Accuracy of Intensity and Inclinometer Output of Three Activity Monitors for Identification of Sedentary Behavior and Light-Intensity Activity
Journal of obesity, Vol.2012, 460271
2012
DOI: 10.1155/2012/460271
PMCID: PMC3228344
PMID: 22175006
Abstract
Purpose
. To examine the accuracy of intensity and inclinometer output of three physical activity monitors during various sedentary and light-intensity activities.
Methods
. Thirty-six participants wore three physical activity monitors (ActiGraph GT1M, ActiGraph GT3X+, and StepWatch) while completing sedentary (lying, sitting watching television, sitting using computer, and standing still) light (walking 1.0 mph, pedaling 7.0 mph, pedaling 15.0 mph) intensity activities under controlled settings. Accuracy for correctly categorizing intensity was assessed for each monitor and threshold. Accuracy of the GT3X+ inclinometer function (GT3X+Incl) for correctly identifying anatomical position was also assessed. Percentage agreement between direct observation and the monitor recorded time spent in sedentary behavior and light intensity was examined.
Results
. All monitors using all thresholds accurately identified over 80% of sedentary behaviors and 60% of light-intensity walking time based on intensity output. The StepWatch was the most accurate in detecting pedaling time but unable to detect pedal workload. The GT3X+Incl accurately identified anatomical position during 70% of all activities but demonstrated limitations in discriminating between activities of differing intensity.
Conclusions
. Our findings suggest that all three monitors accurately measure most sedentary and light-intensity activities although choice of monitors should be based on study-specific needs.
Details
- Title: Subtitle
- Accuracy of Intensity and Inclinometer Output of Three Activity Monitors for Identification of Sedentary Behavior and Light-Intensity Activity
- Creators
- Lucas J Carr - Activity Promotion Laboratory, Department of Kinesiology, East Carolina University, Greenville, NC 27858, USAMatthew T Mahar - Activity Promotion Laboratory, Department of Kinesiology, East Carolina University, Greenville, NC 27858, USA
- Resource Type
- Journal article
- Publication Details
- Journal of obesity, Vol.2012, 460271
- DOI
- 10.1155/2012/460271
- PMID
- 22175006
- PMCID
- PMC3228344
- NLM abbreviation
- J Obes
- ISSN
- 2090-0708
- eISSN
- 2090-0716
- Publisher
- Hindawi Publishing Corporation
- Language
- English
- Date published
- 2012
- Academic Unit
- Health, Sport, and Human Physiology
- Record Identifier
- 9984002344102771
Metrics
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