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Study Design. Prospective cohort study. Setting. Tertiary university-affiliated medical center. Thirteen PWP underwent Fiberoptic Endoscopic Evaluation of Swallowing and spirometry assessments both before and after a 4-week ETM use, which included incrementally increasing resistance each week. Measurements taken included EAT-10, swallowing disturbances questionnaire (SDQ), Penetration Aspiration Score (PAS), Yale Pharyngeal Residue Severity Rating Scale, and Peak Expiratory Flow (PEF). Disease severity was assessed using the Unified Parkinson\u2019s Disease Rating Scale (UPDRS). Eleven out of 13 male participants (median age 70\u00a0years, UPDRS 33, disease duration 8.5\u00a0years) completed the 4-week protocol (84.6% completion rate). Vallecular residue significantly decreased for solids (median from 3.0 [IQR: 2.0\u20133.0] to 2.0 [IQR: 1.0\u20132.0], p\u2009=\u20090.028) and semi-solids (from 3.0 [IQR: 2.0\u20134.0] to 2.0 [IQR: 1.0\u20133.0], p\u2009=\u20090.025), with a non-significant improvement for liquids (from 2.0 [IQR: 2.0\u20132.0] to 2.0 [IQR: 1.0\u20132.0], p\u2009=\u20090.19). Patient-reported outcomes (EAT-10, SDQ, VHI-10, RSI) and PEF showed non-significant trends toward improvement. A 4-week use of ETM, serving as a form of respiratory muscle strengthening, demonstrated specific improvements in vallecular residue for semi-solid and solid consistencies in PWP with dysphagia. While other swallowing and respiratory measures showed positive trends, these changes did not reach statistical significance. Further research with a larger cohort is needed to evaluate ETM\u2019s role in swallowing rehabilitation.<\/jats:p>","DOI":"10.1007\/s00455-025-10815-5","type":"journal-article","created":{"date-parts":[[2025,2,25]],"date-time":"2025-02-25T13:36:48Z","timestamp":1740490608000},"page":"1184-1190","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Effect of Elevation Training Mask on Swallowing Function in Individuals with Parkinson\u2019s Disease"],"prefix":"10.1007","volume":"40","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-6202-4647","authenticated-orcid":false,"given":"Yuval","family":"Nachalon","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dina","family":"Shpunt","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anat","family":"Zait","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yael","family":"Oestreicher-Kedem","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Liav","family":"Hayat","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yarden","family":"Ashkenazi","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Nogah","family":"Nativ-Zeltzer","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter C.","family":"Belafsky","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gadi","family":"Maayan Eshed","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanya","family":"Gurevich","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yael","family":"Manor","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,2,25]]},"reference":[{"issue":"9","key":"10815_CR1","first-page":"519","volume":"31","author":"Y Nachalon","year":"2023","unstructured":"Nachalon Y, Nativ-Zeltzer N, Dhar SI, Cates DJ, Leon IW, Evangelista LM, et al. 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