{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,18]],"date-time":"2026-03-18T23:02:50Z","timestamp":1773874970537,"version":"3.50.1"},"reference-count":39,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,4,12]],"date-time":"2023-04-12T00:00:00Z","timestamp":1681257600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"DoMoMEA","award":["Sardegna Ricerche POR FESR 2014\/2020"],"award-info":[{"award-number":["Sardegna Ricerche POR FESR 2014\/2020"]}]},{"name":"DoMoMEA","award":["ECS00000036"],"award-info":[{"award-number":["ECS00000036"]}]},{"name":"NODES","award":["Sardegna Ricerche POR FESR 2014\/2020"],"award-info":[{"award-number":["Sardegna Ricerche POR FESR 2014\/2020"]}]},{"name":"NODES","award":["ECS00000036"],"award-info":[{"award-number":["ECS00000036"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The analysis of the stability of human gait may be effectively performed when estimates of the base of support are available. The base of support area is defined by the relative position of the feet when they are in contact with the ground and it is closely related to additional parameters such as step length and stride width. These parameters may be determined in the laboratory using either a stereophotogrammetric system or an instrumented mat. Unfortunately, their estimation in the real world is still an unaccomplished goal. This study aims at proposing a novel, compact wearable system, including a magneto-inertial measurement unit and two time-of-flight proximity sensors, suitable for the estimation of the base of support parameters. The wearable system was tested and validated on thirteen healthy adults walking at three self-selected speeds (slow, comfortable, and fast). Results were compared with the concurrent stereophotogrammetric data, used as the gold standard. The root mean square errors for the step length, stride width and base of support area varied from slow to high speed between 10\u201346 mm, 14\u201318 mm, and 39\u201352 cm2, respectively. The mean overlap of the base of support area as obtained with the wearable system and with the stereophotogrammetric system ranged between 70% and 89%. Thus, this study suggested that the proposed wearable solution is a valid tool for the estimation of the base of support parameters out of the laboratory.<\/jats:p>","DOI":"10.3390\/s23083921","type":"journal-article","created":{"date-parts":[[2023,4,13]],"date-time":"2023-04-13T02:09:21Z","timestamp":1681351761000},"page":"3921","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Base of Support, Step Length and Stride Width Estimation during Walking Using an Inertial and Infrared Wearable System"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0009-0003-0805-5364","authenticated-orcid":false,"given":"Rachele","family":"Rossanigo","sequence":"first","affiliation":[{"name":"Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1529-8095","authenticated-orcid":false,"given":"Marco","family":"Caruso","sequence":"additional","affiliation":[{"name":"PolitoBIOMed Lab\u2014Biomedical Engineering Lab, Politecnico di Torino, 10129 Torino, Italy"},{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, 10129 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6422-1676","authenticated-orcid":false,"given":"Stefano","family":"Bertuletti","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8235-6091","authenticated-orcid":false,"given":"Franca","family":"Deriu","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy"},{"name":"Unit of Endocrinology, Nutritional and Metabolic Disorders, AOU Sassari, 07100 Sassari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5396-5103","authenticated-orcid":false,"given":"Marco","family":"Knaflitz","sequence":"additional","affiliation":[{"name":"PolitoBIOMed Lab\u2014Biomedical Engineering Lab, Politecnico di Torino, 10129 Torino, Italy"},{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, 10129 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5151-7403","authenticated-orcid":false,"given":"Ugo","family":"Della Croce","sequence":"additional","affiliation":[{"name":"Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7276-5382","authenticated-orcid":false,"given":"Andrea","family":"Cereatti","sequence":"additional","affiliation":[{"name":"Department of Electronics and Telecommunications, Politecnico di Torino, 10129 Torino, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,12]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jbiomech.2004.03.025","article-title":"The Condition for Dynamic Stability","volume":"38","author":"Hof","year":"2005","journal-title":"J. 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