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Altered sleep behavior and lower daily steps have been linked to disease severity and symptom burden. Although physical activity may influence sleep, few studies have examined the relationship between sleep parameters and daily steps in PD. This scoping review aimed to review current knowledge on sleep parameters and daily steps collected concurrently in PwPD and their potential association. Methods: A systematic search was conducted in five databases, PubMed, Web of Science, Sport Discus, Cochrane Library, and Scopus. Methodological quality was assessed using a customized quality checklist developed by Zanardi and collaborators for observational studies, based on Downs and Black\u2019s work. Results: Out of 1421 records, five studies met the eligibility criteria and were included in the review. Four studies reported wearable-based measurements of both step count and sleep parameters, while one study reported wearable-based measurements of step count and self-reported sleep measures. Two studies examined the association between sleep parameters and step count. One study did not find any correlation between sleep and step count, whereas one study reported a positive correlation between daytime sleepiness and step count. Conclusions: This review highlighted the lack of research investigating the relationship between sleep parameters and step count as an indicator of physical activity in PwPD. Findings are inconsistent with a potential positive correlation emerging between daytime sleepiness and step count. Findings also pointed toward lower step count and reduced sleep duration in PwPD, as measured with wearable devices.<\/jats:p>","DOI":"10.3390\/s25144447","type":"journal-article","created":{"date-parts":[[2025,7,17]],"date-time":"2025-07-17T11:25:17Z","timestamp":1752751517000},"page":"4447","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Associations Between Daily Step Counts and Sleep Parameters in Parkinson\u2019s Disease: A Scoping Review"],"prefix":"10.3390","volume":"25","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-0030-9191","authenticated-orcid":false,"given":"Tracy","family":"Milane","sequence":"first","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Department of Neurology, Kiel University, 24105 Kiel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7955-3369","authenticated-orcid":false,"given":"Edoardo","family":"Bianchini","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, 00189 Rome, Italy"},{"name":"Department of Human Neurosciences, Sapienza University of Rome, 00185 Rome, Italy"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9806-0639","authenticated-orcid":false,"given":"Matthias","family":"Chardon","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3678-8456","authenticated-orcid":false,"given":"Fabio Augusto","family":"Barbieri","sequence":"additional","affiliation":[{"name":"Human Movement Research Laboratory (MOVI-LAB), Department of Physical Education, School of Sciences, Sao Paulo State University (UNESP), Bauru 17033-360, SP, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4813-3868","authenticated-orcid":false,"given":"Clint","family":"Hansen","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Department of Neurology, Kiel University, 24105 Kiel, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3773-393X","authenticated-orcid":false,"given":"Nicolas","family":"Vuillerme","sequence":"additional","affiliation":[{"name":"AGEIS, Universit\u00e9 Grenoble Alpes, 38000 Grenoble, France"},{"name":"Institut Universitaire de France, 75005 Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,7,17]]},"reference":[{"key":"ref_1","first-page":"S3","article-title":"The Emerging Evidence of the Parkinson Pandemic","volume":"8","author":"Dorsey","year":"2018","journal-title":"J. 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