Editorial: Wearable sensors for the measurement of physiological signals: what about their measurement uncertainty?

This article is an editorial that discusses the metrological characterization and validation of wearable sensors for the measurement of physiological signals. The authors emphasize the importance of providing measurement accuracy along with the results to properly interpret them. They also highlight the use of wearable sensors in various contexts such as sport, medicine, telemedicine, and personal health monitoring. The article features five articles that cover topics such as step counting, balance assessment, gait event detection, and monitoring of stroke patients. The authors stress the need for standardized validation protocols and positioning of sensors for accurate and reliable results. They also mention the potential use of smartphones as wearable devices for physiological monitoring and propose a calibration methodology for photoplethysmographic measurements using smartphone cameras. Overall, the article emphasizes the importance of considering measurement uncertainty and provides insights into the research and advancements in wearable sensor technology. [Extracted from the article]