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Title
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Validity and reliability of measuring steps and energy expenditure with a triaxial accelerometer in healthy adults under controlled conditions
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Author
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Abstract
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| Purpose: To determine the validity and test-retest reliability of a triaxial accelerometer in measuring steps and estimating energy expenditure in healthy adults. Method: 20 volunteers walked 3 times for 10 minutes on a treadmill following a standardized protocol. Data of the accelerometer were compared to hand tally counted steps and to breath by breath analysis of respiratory variables. Bland-Altman plots and an intra-class correlation coefficients were used to determine validity and reliability. Results: Accelerometers generated valid results at 5km/h but not at 3km/h. At 5 km/h the lanyard and belt positions were more valid than the pocket positions. The test-retest reliability was good to excellent for steps (ICC range .78 - .92) and moderate to good for energy expenditure (ICC range .64 - .87). Conclusions: The accelerometer generated valid results for the number of steps at 5 km/h with a coefficient of variation of 1-1.6% but overestimated energy expenditure. |
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Language
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English
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Source (journal)
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Health care
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Publication
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2013
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DOI
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10.12966/HC.5.2.2013
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Volume/pages
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1
:1
(2013)
, p. 5-8
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Full text (Publisher's DOI)
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Full text (publisher's version - intranet only)
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