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We examined whether high-intensity balance and gait training (HiBalance) alters balance discordance in individuals with PD, and whether baseline sedentary behavior influences these changes. A secondary analysis examining pre- to post-intervention discordance changes of two HiBalance clinical trials (\n                    <jats:italic>N<\/jats:italic>\n                    \u2009=\u200997) using linear regression with interactions between sedentary behavior and pre-intervention discordance. The sample included two cohorts: one clinical and one research based. The model including sedentary behavior and its interaction with pre-intervention discordance explained 49% of variance. Significant predictors of post-intervention discordance were pre-intervention discordance (\u03b2\u2009=\u20098.78,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009&lt;\u20090.001) and cohort (\u03b2\u2009=\u20098.82,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.006), while the interaction between pre-intervention discordance and sedentary time did not reach significance (\u03b2\u2009=\u2009\u22122.64,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.05). Sensitivity analyses revealed that the clinical-based cohort model explained 24.7% of the variance in post-intervention discordance, with the interaction between pre-intervention discordance and sedentary time (\u03b2\u2009=\u2009\u22127.23,\n                    <jats:italic>p<\/jats:italic>\n                    \u2009=\u20090.004) as a significant predictor. HiBalance training did not significantly alter balance discordance. However, pre-intervention sedentary behavior may influence how much individuals with PD recalibrate the relationship between perceived and actual balance following physical rehabilitation.\n                  <\/jats:p>","DOI":"10.1038\/s41531-026-01357-0","type":"journal-article","created":{"date-parts":[[2026,4,16]],"date-time":"2026-04-16T20:48:12Z","timestamp":1776372492000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Sedentary behavior modifies the effect of balance rehabilitation on balance discordance in Parkinson\u2019s disease"],"prefix":"10.1038","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5891-445X","authenticated-orcid":false,"given":"Franziska","family":"Albrecht","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sarah J.","family":"Conklin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andrew","family":"Hooyman","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Daniel S.","family":"Peterson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jason K.","family":"Longhurst","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Erika","family":"Franz\u00e9n","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,4,16]]},"reference":[{"key":"1357_CR1","doi-asserted-by":"crossref","unstructured":"Longhurst, J. et al. 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