{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,6]],"date-time":"2025-12-06T21:49:08Z","timestamp":1765057748987,"version":"build-2065373602"},"reference-count":65,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T00:00:00Z","timestamp":1616544000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["POCI-01-0145-FEDER-007038","PD\/BDE\/127831\/2016"],"award-info":[{"award-number":["POCI-01-0145-FEDER-007038","PD\/BDE\/127831\/2016"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100008530","name":"European Regional Development Fund","doi-asserted-by":"publisher","award":["NORTE- 01-0145-FEDER000013","POCI-01-0145-FEDER-016428"],"award-info":[{"award-number":["NORTE- 01-0145-FEDER000013","POCI-01-0145-FEDER-016428"]}],"id":[{"id":"10.13039\/501100008530","id-type":"DOI","asserted-by":"publisher"}]},{"name":"2CA-Braga Grant","award":["2017 Clinical Research Projects"],"award-info":[{"award-number":["2017 Clinical Research Projects"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Accurate assessment of physical activity (PA) is crucial in interventions promoting it and in studies exploring its association with health status. Currently, there is a wide range of assessment tools available, including subjective and objective measures. This study compared accelerometer-based estimates of PA with self-report PA data in older adults. Additionally, the associations between PA and health outcomes and PA profiles were analyzed. Participants (n = 110) wore a Xiaomi Mi Band 2\u00ae for fifteen consecutive days. Self-reported PA was assessed using the International Physical Activity Questionnaire (IPAQ) and the Yale Physical Activity Survey (YPAS). The Spearman correlation coefficient was used to compare self-reported and accelerometer-measured PA and associations between PA and health. Bland\u2013Altman plots were performed to assess the agreement between methods. Results highlight a large variation between self-reported and Xiaomi Mi Band 2\u00ae estimates, with poor general agreement. The highest difference was found for sedentary time. Low positive correlations were observed for IPAQ estimates (sedentary, vigorous, and total PA) and moderate for YPAS vigorous estimates. Finally, self-reported and objectively measured PA associated differently with health outcomes. Summarily, although accelerometry has the advantage of being an accurate method, self-report questionnaires could provide valuable information about the context of the activity.<\/jats:p>","DOI":"10.3390\/s21072258","type":"journal-article","created":{"date-parts":[[2021,3,24]],"date-time":"2021-03-24T21:36:51Z","timestamp":1616621811000},"page":"2258","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":27,"title":["Association between Self-Reported and Accelerometer-Based Estimates of Physical Activity in Portuguese Older Adults"],"prefix":"10.3390","volume":"21","author":[{"given":"C\u00e9lia","family":"Domingos","sequence":"first","affiliation":[{"name":"Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal"},{"name":"ICVS\/3B\u2019s, PT Government Associate Laboratory, 4710-057 Braga\/Guimar\u00e3es, Portugal"},{"name":"iCognitus4ALL-IT Solutions, 4710-057 Braga, Portugal"},{"name":"Clinical Academic Center-Braga (2CA-B), 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8110-7173","authenticated-orcid":false,"given":"Nadine","family":"Correia Santos","sequence":"additional","affiliation":[{"name":"Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal"},{"name":"ICVS\/3B\u2019s, PT Government Associate Laboratory, 4710-057 Braga\/Guimar\u00e3es, Portugal"},{"name":"Clinical Academic Center-Braga (2CA-B), 4710-057 Braga, Portugal"},{"name":"ACMP5-Associa\u00e7\u00e3o Centro de Medicina P5 (P5), School of Medicine, University of Minho, 4710-057 Braga, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9497-6543","authenticated-orcid":false,"given":"Jos\u00e9 Miguel","family":"P\u00eago","sequence":"additional","affiliation":[{"name":"Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, 4710-057 Braga, Portugal"},{"name":"ICVS\/3B\u2019s, PT Government Associate Laboratory, 4710-057 Braga\/Guimar\u00e3es, Portugal"},{"name":"iCognitus4ALL-IT Solutions, 4710-057 Braga, Portugal"},{"name":"Clinical Academic Center-Braga (2CA-B), 4710-057 Braga, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2021,3,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"284","DOI":"10.1186\/1471-2458-14-284","article-title":"Accelerometer-determined physical activity and self-reported health in a population of older adults (65\u201385 years): A cross-sectional study","volume":"14","author":"Hansen","year":"2014","journal-title":"BMJ Public Health"},{"key":"ref_2","first-page":"425","article-title":"Exercise Prescriptions in Older Adults","volume":"95","author":"Lee","year":"2017","journal-title":"Am. 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