Validation of a wrist-worn activity monitor in the estimation of energy expenditure during daily activities
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The Polar FA20 (FA20) is a wrist-worn activity monitor that measures accelerations and determines three types of physical activity (PA) intensities (light, health- and fitness-related activity) based on acceleration data. Furthermore, it determines PA energy expenditure (EE) and provides a personal feedback about performed activity on the display of the monitor. The aim of this study was to determine the accuracy of the FA20 activity watch in terms of activity recognition and EE.