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Employers lose money when their employees suffer from different health problems and cannot work. The major problem is the spinal pain caused by the poor sitting posture on the office chair. This paper deals with the proposal and realization of the system for the detection of incorrect sitting positions. The smart chair has six flexible force sensors. The Internet of Things (IoT) node based on Arduino connects these sensors into the system. The system detects wrong seating positions and notifies the users. In advance, we develop a mobile application to receive those notifications. The user gets feedback about sitting posture and additional statistical data. We defined simple rules for processing the sensor data for recognizing wrong sitting postures. The data from smart chairs are collected by a private cloud solution from QNAP and are stored in the MongoDB database. We used the Node-RED application for the whole logic implementation.<\/jats:p>","DOI":"10.1155\/2020\/6625797","type":"journal-article","created":{"date-parts":[[2020,11,19]],"date-time":"2020-11-19T20:05:09Z","timestamp":1605816309000},"page":"1-13","source":"Crossref","is-referenced-by-count":41,"title":["A Smart System for Sitting Posture Detection Based on Force Sensors and Mobile Application"],"prefix":"10.1155","volume":"2020","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0499-0625","authenticated-orcid":true,"given":"Slavomir","family":"Matuska","sequence":"first","affiliation":[{"name":"Department of Multimedia and Information-Communication Technologies, Faculty of Electrical Engineering and Information Technology, University of Zilina, 01008 Zilina, Slovakia"}]},{"given":"Martin","family":"Paralic","sequence":"additional","affiliation":[{"name":"Department of Multimedia and Information-Communication Technologies, Faculty of Electrical Engineering and Information Technology, University of Zilina, 01008 Zilina, Slovakia"}]},{"given":"Robert","family":"Hudec","sequence":"additional","affiliation":[{"name":"Department of Multimedia and Information-Communication Technologies, Faculty of Electrical Engineering and Information Technology, University of Zilina, 01008 Zilina, Slovakia"}]}],"member":"311","reference":[{"issue":"10053","key":"1","doi-asserted-by":"crossref","first-page":"1545","DOI":"10.1016\/S0140-6736(16)31678-6","article-title":"GBD 2015 Disease and Injury Incidence and Prevalence Collaborators, \u201cGlobal, Regional, and National Incident, Prevalence, and Years Lived with Disability for 310 Diseases and Injuries, 1990-2015: A Systematic Analysis for the Global Burden of Disease Study 2015","volume":"388","author":"Vos","year":"2016","journal-title":"The Lancet"},{"issue":"Issue 1","key":"2","first-page":"35","article-title":"Impact of seating posture on user comfort and typing performance for people with chronic low back pain","volume":"38","author":"H. 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