{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T02:40:56Z","timestamp":1769395256064,"version":"3.49.0"},"reference-count":31,"publisher":"MDPI AG","issue":"8","license":[{"start":{"date-parts":[[2023,4,21]],"date-time":"2023-04-21T00:00:00Z","timestamp":1682035200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Institutional collaborative grant of the department Rehabilitation Sciences at KU Leuven"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Maintaining physical activity is an important clinical goal for people with Parkinson\u2019s disease (PwPD). We investigated the validity of two commercial activity trackers (ATs) to measure daily step counts. We compared a wrist- and a hip-worn commercial AT against the research-grade Dynaport Movemonitor (DAM) during 14 days of daily use. Criterion validity was assessed in 28 PwPD and 30 healthy controls (HCs) by a 2 \u00d7 3 ANOVA and intraclass correlation coefficients (ICC2,1). The ability to measure daily step fluctuations compared to the DAM was studied by a 2 \u00d7 3 ANOVA and Kendall correlations. We also explored compliance and user-friendliness. Both the ATs and the DAM measured significantly fewer steps\/day in PwPD compared to HCs (p &lt; 0.01). Step counts derived from the ATs showed good to excellent agreement with the DAM in both groups (ICC2,1 &gt; 0.83). Daily fluctuations were detected adequately by the ATs, showing moderate associations with DAM-rankings. While compliance was high overall, 22% of PwPD were disinclined to use the ATs after the study. Overall, we conclude that the ATs had sufficient agreement with the DAM for the purpose of promoting physical activity in mildly affected PwPD. However, further validation is needed before clinical use can be widely recommended.<\/jats:p>","DOI":"10.3390\/s23084156","type":"journal-article","created":{"date-parts":[[2023,4,21]],"date-time":"2023-04-21T04:48:11Z","timestamp":1682052491000},"page":"4156","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":16,"title":["Validation of Commercial Activity Trackers in Everyday Life of People with Parkinson\u2019s Disease"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6762-3347","authenticated-orcid":false,"given":"Pieter","family":"Ginis","sequence":"first","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Neurorehabilitation Research Group (eNRGy), 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4890-4530","authenticated-orcid":false,"given":"Maaike","family":"Goris","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Neurorehabilitation Research Group (eNRGy), 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"An","family":"De Groef","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Research Group for Rehabilitation in Internal Disorders (GRID), 3000 Leuven, Belgium"},{"name":"MOVANT Research Group, Department of Rehabilitation Sciences, University of Antwerp, 2000 Antwerp, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Astrid","family":"Blondeel","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Research Group for Rehabilitation in Internal Disorders (GRID), 3000 Leuven, Belgium"},{"name":"Pulmonary Rehabilitation, Respiratory Department, University Hospitals Gasthuisberg, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Moran","family":"Gilat","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Neurorehabilitation Research Group (eNRGy), 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Heleen","family":"Demeyer","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Research Group for Rehabilitation in Internal Disorders (GRID), 3000 Leuven, Belgium"},{"name":"Department of Rehabilitation Sciences, Ghent University, 9000 Ghent, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2767-5027","authenticated-orcid":false,"given":"Thierry","family":"Troosters","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Research Group for Rehabilitation in Internal Disorders (GRID), 3000 Leuven, Belgium"},{"name":"Pulmonary Rehabilitation, Respiratory Department, University Hospitals Gasthuisberg, 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Alice","family":"Nieuwboer","sequence":"additional","affiliation":[{"name":"KU Leuven, Department of Rehabilitation Sciences, Neurorehabilitation Research Group (eNRGy), 3000 Leuven, Belgium"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,4,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1418","DOI":"10.1007\/s13311-020-00904-8","article-title":"Current Perspectives on Aerobic Exercise in People with Parkinson\u2019s Disease","volume":"17","author":"Schootemeijer","year":"2020","journal-title":"Neurotherapeutics"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"689","DOI":"10.1038\/nrneurol.2017.128","article-title":"Long-term effects of exercise and physical therapy in people with Parkinson disease","volume":"13","author":"Mak","year":"2017","journal-title":"Nat. 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