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Int. J. Environ. Res. Public Health 2017, 14(5), 511;

Validity of Research-Grade Actigraphy Unit for Measuring Exercise Intensity

Department of Landscape Architecture, National Chin-Yi University of Technology, 57 Sec. 2, Zhongshan Rd., Taichung City 41170, Taiwan
Department of Landscape Architecture, National Chiayi University, 300 Syuefu Rd., Chiayi City 60004, Taiwan
Author to whom correspondence should be addressed.
Academic Editor: Li Ming Wen
Received: 15 December 2016 / Revised: 14 April 2017 / Accepted: 1 May 2017 / Published: 10 May 2017
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This study was conducted in a free-living setting to investigate the measurement validity of a research-based actigraph for strolling and jogging, and to provide a reference for actual practice and research. Because inadequate physical activity (PA) or sedentary lifestyle has become the fourth leading risk factor for mortality worldwide, many countries have been vigorously promoting the concept of “active living”, and the public has been investing greater effort into intensifying their PA. Although research-grade actigraphs have been widely applied to evaluate PA in routine environments, the measurement results may not accurately reflect the wearers’ PA. Unlike most relevant research, which is conducted in well-controlled laboratory environments, the present study was implemented in the field to examine the sensitivity and convergent validity of the MicroMini Motionlogger® Actigraph during strolling and jogging. The following results were revealed: (1) Although the exercise movement speed while jogging was significantly faster than that while strolling, the actigraph readings showed no significant difference between strolling and jogging; (2) The actigraph readings were (significantly or nonsignificantly) negatively correlated with metabolic heat and nonsignificantly correlated with movement speeds. Hence, the actigraph validity for measuring PA intensity while strolling and jogging remains debatable. View Full-Text
Keywords: active living; energy expenditure (EE); metabolic heat (MH); physical activity (PA); sedentary lifestyle active living; energy expenditure (EE); metabolic heat (MH); physical activity (PA); sedentary lifestyle

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Han, K.-T.; Wang, P.-C. Validity of Research-Grade Actigraphy Unit for Measuring Exercise Intensity. Int. J. Environ. Res. Public Health 2017, 14, 511.

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