{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,23]],"date-time":"2026-02-23T23:07:53Z","timestamp":1771888073049,"version":"3.50.1"},"reference-count":19,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2020,9,19]],"date-time":"2020-09-19T00:00:00Z","timestamp":1600473600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["SFRH\/BD\/130384\/2017"],"award-info":[{"award-number":["SFRH\/BD\/130384\/2017"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["PD\/BD\/128205\/2016"],"award-info":[{"award-number":["PD\/BD\/128205\/2016"]}]},{"name":"Funda\u00e7\u00e3o para a Ci\u00eancia e Tecnologia","award":["PD\/BD\/105933\/2014"],"award-info":[{"award-number":["PD\/BD\/105933\/2014"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Back and spine-related issues are frequent maladies that most people have or will experience during their lifetime. A common and sensible observation that can be made is regarding the posture of an individual. We present a new approach that combines accelerometer, gyroscope, and magnetometer sensor data in combination with permanent magnets assembled as a wearable device capable of real-time spine posture monitoring. An independent calibration of the device is required for each user. The sensor data is processed by a probabilistic classification algorithm that compares the real-time data with the calibration result, verifying whether the data point lies within regions of confidence defined by a computed threshold. An incorrect posture classification is considered if both accelerometer and magnetometer classify the posture as incorrect. A pilot trial was performed in a single adult test subject. The combination of the magnets and magnetometer greatly improved the posture classification accuracy (89%) over the accuracy obtained when only accelerometer data were used (47%). The validation of this method was based on image analysis.<\/jats:p>","DOI":"10.3390\/s20185376","type":"journal-article","created":{"date-parts":[[2020,9,19]],"date-time":"2020-09-19T07:06:09Z","timestamp":1600499169000},"page":"5376","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Spine Cop: Posture Correction Monitor and Assistant"],"prefix":"10.3390","volume":"20","author":[{"given":"Pedro","family":"Ribeiro","sequence":"first","affiliation":[{"name":"Instituto de Engenharia de Sistemas e Computadores\u2014Microsystems and Nanotechnologies, 1000-019 Lisbon, Portugal"},{"name":"Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"given":"Ana Rita","family":"Soares","sequence":"additional","affiliation":[{"name":"Instituto de Engenharia de Sistemas e Computadores\u2014Microsystems and Nanotechnologies, 1000-019 Lisbon, Portugal"},{"name":"Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"given":"Rafael","family":"Gir\u00e3o","sequence":"additional","affiliation":[{"name":"Instituto de Engenharia de Sistemas e Computadores\u2014Microsystems and Nanotechnologies, 1000-019 Lisbon, Portugal"},{"name":"Critical Software, 3045-504 Taveiro, Portugal"}]},{"given":"Miguel","family":"Neto","sequence":"additional","affiliation":[{"name":"Instituto de Engenharia de Sistemas e Computadores\u2014Microsystems and Nanotechnologies, 1000-019 Lisbon, Portugal"},{"name":"Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6913-6529","authenticated-orcid":false,"given":"Susana","family":"Cardoso","sequence":"additional","affiliation":[{"name":"Instituto de Engenharia de Sistemas e Computadores\u2014Microsystems and Nanotechnologies, 1000-019 Lisbon, Portugal"},{"name":"Instituto Superior T\u00e9cnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2020,9,19]]},"reference":[{"key":"ref_1","unstructured":"(2020, August 23). 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