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Int. J. Environ. Res. Public Health 2010, 7(4), 1558-1576; doi:10.3390/ijerph7041558
Article

A Comparison of Two Motion Sensors for the Assessment of Free-Living Physical Activity of Adolescents

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Received: 5 February 2010 / Revised: 16 March 2010 / Accepted: 25 March 2010 / Published: 6 April 2010
(This article belongs to the Special Issue Health and Wellbeing of Children, Adolescents and Young Adults)
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Abstract

This study assessed and compared the daily step counts recorded by two different motion sensors in order to estimate the free-living physical activity of 135 adolescent girls. Each girl concurrently wore a Yamax pedometer and an ActiGraph accelerometer (criterion measure) every day for seven consecutive days. The convergent validity of the pedometer can be considered intermediate when used to measure the step counts in free-living physical activity; but should be considered with caution when used to classify participants’ step counts into corresponding physical activity categories because of a likelihood of ‘erroneous’ classification in comparison with the accelerometer.
Keywords: pedometer; accelerometer; validity; monitoring; measurement; step counter; categorization of physical activity pedometer; accelerometer; validity; monitoring; measurement; step counter; categorization of physical activity
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Cuberek, R.; El Ansari, W.; Frömel, K.; Skalik, K.; Sigmund, E. A Comparison of Two Motion Sensors for the Assessment of Free-Living Physical Activity of Adolescents. Int. J. Environ. Res. Public Health 2010, 7, 1558-1576.

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