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To address this, a new sensor-based system is presented: the Smart Workwear System, aimed at facilitating preventive measures by supporting risk assessments, work design, and work technique training. The system has a module-based platform that enables flexibility of sensor-type utilization, depending on the specific application. A module of the Smart Workwear System that utilizes haptic feedback for work technique training is further presented and evaluated in simulated mail sorting on sixteen novice participants for its potential to reduce adverse arm movements and postures in repetitive manual handling. Upper-arm postures were recorded, using an inertial measurement unit (IMU), perceived pain\/discomfort with the Borg CR10-scale, and user experience with a semi-structured interview. This study shows that the use of haptic feedback for work technique training has the potential to significantly reduce the time in adverse upper-arm postures after short periods of training. The haptic feedback was experienced positive and usable by the participants and was effective in supporting learning of how to improve postures and movements. It is concluded that this type of sensorized system, using haptic feedback training, is promising for the future, especially when organizations are introducing newly employed staff, when teaching ergonomics to employees in physically demanding jobs, and when performing ergonomics interventions.<\/jats:p>","DOI":"10.3390\/s20216010","type":"journal-article","created":{"date-parts":[[2020,10,23]],"date-time":"2020-10-23T08:59:28Z","timestamp":1603443568000},"page":"6010","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":48,"title":["A Wearable Sensor System for Physical Ergonomics Interventions Using Haptic Feedback"],"prefix":"10.3390","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5979-5504","authenticated-orcid":false,"given":"Carl Mikael","family":"Lind","sequence":"first","affiliation":[{"name":"Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, H\u00e4lsov\u00e4gen 11C, 14157 Huddinge, Sweden"},{"name":"Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Solnav\u00e4gen 4, 11365 Stockholm, Sweden"}]},{"given":"Jose Antonio","family":"Diaz-Olivares","sequence":"additional","affiliation":[{"name":"Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, H\u00e4lsov\u00e4gen 11C, 14157 Huddinge, Sweden"},{"name":"Department of Biosystems, Biosystems Technology Cluster Campus Geel, KU Leuven, Kleinhoefstraat 4, 2440 Geel, Belgium"}]},{"given":"Kaj","family":"Lindecrantz","sequence":"additional","affiliation":[{"name":"Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, H\u00e4lsov\u00e4gen 11C, 14157 Huddinge, Sweden"},{"name":"Science Park Bor\u00e5s, University of Bor\u00e5s, SE-501 90 Bor\u00e5s, Sweden"}]},{"given":"J\u00f6rgen","family":"Eklund","sequence":"additional","affiliation":[{"name":"Division of Ergonomics, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, H\u00e4lsov\u00e4gen 11C, 14157 Huddinge, Sweden"},{"name":"Unit of Occupational Medicine, Institute of Environmental Medicine, Karolinska Institutet, Solnav\u00e4gen 4, 11365 Stockholm, Sweden"}]}],"member":"1968","published-online":{"date-parts":[[2020,10,23]]},"reference":[{"key":"ref_1","unstructured":"Tompa, E., Mofidi, A., van den Heuvel, S., van Bree, T., Michaelsen, F., Jung, Y., Porsch, L., and van Emmerik, M. 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