A review of accelerometry-based wearable motion detectors for physical activity monitoring

Che-Chang Yang, Yeh-Liang Hsu, Che-Chang Yang, Yeh-Liang Hsu

Abstract

Characteristics of physical activity are indicative of one's mobility level, latent chronic diseases and aging process. Accelerometers have been widely accepted as useful and practical sensors for wearable devices to measure and assess physical activity. This paper reviews the development of wearable accelerometry-based motion detectors. The principle of accelerometry measurement, sensor properties and sensor placements are first introduced. Various research using accelerometry-based wearable motion detectors for physical activity monitoring and assessment, including posture and movement classification, estimation of energy expenditure, fall detection and balance control evaluation, are also reviewed. Finally this paper reviews and compares existing commercial products to provide a comprehensive outlook of current development status and possible emerging technologies.

Keywords: accelerometer; accelerometry; energy expenditure; fall detection; gait; human motion; physical activity.

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