Abstract: Recent advances in miniature devices, as well as mobile and ubiquitous computing, have fostered a dramatic growth of interest for wearable technology. Wearable biosensors systems are an emerging trend and are expected to be revolutionary in many application areas, ranging from cardiovascular monitoring to battle field monitoring and sports medicine. These systems, comprising various types of small physiological sensors, transmission modules and processing capabilities, promise to change the future of health care, by providing low-cost wearable unobtrusive solutions for continuous all-day and any-place health, mental and activity status monitoring. This is due to the large number of companies that have recently started investing aggressively in the development of wearable products for various applications. However, reliability of these wearable sensors is by far inferior to their traditional counterparts, leading to frequent false alarms. Since most of the potential applications are for field use, the wearable sensors must be robust against disturbances, in particular, the motion of the wearer. New technology is needed for eliminating motion artifact and recovering signals corrupted with the body motion. This is a rapidly growing product sector. Large numbers of up-and coming tech companies are investing heavily in this area, along with networks, device makers and venture capitalists. As a result, in 10 years' time, things will look a lot different than they do today. This paper presents a comprehensive study of various applications of wearable bio sensors in the field of health care, activity recognition, sports science, patient monitoring, road accidents prevention, and many more applicable in our daily life. Keywords: Wearable devices and systems, activity recognition, bio-sensor, wearable computers, road safety, wound healing, hydrogels, C-reactive proteins, hypertension, reading or mobility aids.
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