Wearable technologies are gaining momentum and widespread diffusion. Thanks to devices such as activity trackers, in form\nof bracelets, watches, or anklets, the end-users are becoming more and more aware of their daily activity routine, posture, and\ntraining and canmodify their motor-behavior. Activity trackers are prevalently based on inertial sensors such as accelerometers and\ngyroscopes. Loads we bear with us and the interface pressure they put on our body also affect posture. A contact interface pressure\nsensing wearable would be beneficial to complement inertial activity trackers.What is precluding force sensing resistors (FSR) to be\nthe next best seller wearable? In this paper, we provide elements to answer this question.We build an FSR based on resistivematerial\n(Velostat) and printed conductive ink electrodes on polyethylene terephthalate (PET) substrate; we test its response to pressure in\nthe range 0ââ?¬â??2.7 kPa. We present a state-of-the-art review, filtered by the need to identify technologies adequate for wearables. We\nconclude that the repeatability is the major issue yet unsolved.
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