{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,11]],"date-time":"2026-02-11T19:49:35Z","timestamp":1770839375351,"version":"3.50.1"},"reference-count":34,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"1","content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2021,3]]},"abstract":"<jats:p>Parkinson\u2019s disease affects the ability to walk often resulting in decreased independence and low quality of life. The purpose of this study was to examine differences in plantarflexor strength (PFS), gait speed, and step length in persons with Parkinson\u2019s disease (PwP) and healthy peers using clinical measures. A secondary purpose was to examine the relationship between these gait components across disease severity. The study was a convenience sample of 71 PwP and 25 community healthy peers. Outcome measures included 10-Meter Walk, step length, and Calf-Raise Senior Test. PwP were separated into mild and moderate impairment groups using the Movement Disorders Society United Parkinson\u2019s Disease Rating Scale Motor Subscale. Between group differences for gait speed (<jats:italic toggle=\"yes\">F<\/jats:italic>\n                           <jats:sub>2,93<\/jats:sub> = 24.560, <jats:italic toggle=\"yes\">P<\/jats:italic> = 0.000), step length (<jats:italic toggle=\"yes\">F<\/jats:italic>\n                           <jats:sub>2,93<\/jats:sub> = 21.93, <jats:italic toggle=\"yes\">P<\/jats:italic> = 0.000) and PFS (<jats:italic toggle=\"yes\">F<\/jats:italic>\n                           <jats:sub>2,93<\/jats:sub> = 19.49, <jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.000) were observed. Post hoc testing determined a difference (<jats:italic toggle=\"yes\">P<\/jats:italic> &lt; 0.00) in gait speed, step length, and PFS testing between moderate impairment versus healthy peers and mild impairment. A difference (<jats:italic toggle=\"yes\">P<\/jats:italic> = 0.045) in step length and a trend towards significance (<jats:italic toggle=\"yes\">P<\/jats:italic> = 0.064) for PFS was found between healthy peers and mild impairment group. This study revealed that PwP with mild impairment also have significant changes in step length and trends toward plantarflexor weakness without a significant difference in gait speed. These early changes may warrant early assessment and intervention to prevent decline. This study may bring clinical focus onto the plantarflexor and step length for early comprehensive assessment and treatment of gait and mobility for PwP.<\/jats:p>","DOI":"10.1097\/mrr.0000000000000439","type":"journal-article","created":{"date-parts":[[2020,10,19]],"date-time":"2020-10-19T01:01:44Z","timestamp":1603069304000},"page":"82-87","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":6,"title":["Plantarflexor strength, gait speed, and step length change in individuals with Parkinson\u2019s disease"],"prefix":"10.1097","volume":"44","author":[{"given":"Staci M.","family":"Shearin","sequence":"first","affiliation":[{"name":"Department of Physical Therapy, The University of Texas Southwestern Medical Center, Dallas"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ann","family":"Medley","sequence":"additional","affiliation":[{"name":"School of Physical Therapy, Texas Woman\u2019s University, Dallas"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Elaine","family":"Trudelle-Jackson","sequence":"additional","affiliation":[{"name":"School of Physical Therapy, Texas Woman\u2019s University, Dallas"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chad","family":"Swank","sequence":"additional","affiliation":[{"name":"Department of Rehabilitation Research, Baylor Scott and White Institute for Rehabilitation, Dallas, Texas, USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ross","family":"Querry","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy, The University of Texas Southwestern Medical Center, Dallas"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"276","published-online":{"date-parts":[[2020,10,16]]},"reference":[{"key":"R1-20250525","doi-asserted-by":"crossref","first-page":"2241","DOI":"10.1212\/01.wnl.0000313835.33830.80","article-title":"Determinants of disability and quality 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