{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T23:04:40Z","timestamp":1788303880467,"version":"build-2803163510"},"reference-count":60,"publisher":"SAGE Publications","issue":"2","license":[{"start":{"date-parts":[[2025,12,4]],"date-time":"2025-12-04T00:00:00Z","timestamp":1764806400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"DOI":"10.13039\/100006108","name":"National Center for Advancing Translational Sciences","doi-asserted-by":"publisher","award":["R03TR004248"],"award-info":[{"award-number":["R03TR004248"]}],"id":[{"id":"10.13039\/100006108","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Magistro Family Foundation Research Grant from the Foundation of Physical Therapy Research"},{"DOI":"10.13039\/100006937","name":"National Center for Medical Rehabilitation Research","doi-asserted-by":"publisher","award":["R03HD104217"],"award-info":[{"award-number":["R03HD104217"]}],"id":[{"id":"10.13039\/100006937","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006937","name":"National Center for Medical Rehabilitation Research","doi-asserted-by":"publisher","award":["R03HD104217-01S1"],"award-info":[{"award-number":["R03HD104217-01S1"]}],"id":[{"id":"10.13039\/100006937","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100006937","name":"National Center for Medical Rehabilitation Research","doi-asserted-by":"publisher","award":["R03HD107630"],"award-info":[{"award-number":["R03HD107630"]}],"id":[{"id":"10.13039\/100006937","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Neurorehabil Neural Repair"],"published-print":{"date-parts":[[2026,2]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Clinical practice guidelines for walking recovery post-stroke recommend high aerobic intensity training, which usually involves walking at fast speeds. However, the acute effect of fast speeds on the neuromuscular control of walking is unclear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Objectives:<\/jats:title>\n                    <jats:p>(1) Assess the criterion validity of the Dynamic Motor Control Index (WalkDMC) as a measure of coactivation post-stroke. (2) Assess acute speed-dependent coactivation post-stroke. (3) Assess how clinical characteristics shape the speed-dependent coactivation response. (4) Assess the relationship between heart rate and coactivation post-stroke. We hypothesized that WalkDMC is correlated with function and impairment measures. We also hypothesize that coactivation measured via the WalkDMC increases for speeds above or below self-selected speeds (SSS).<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>32 chronic stroke survivors and 17 age and sex-matched controls walked at SSS, fast, and slow speeds. EMGs were measured bilaterally on 7 lower extremity muscles. We used non-negative matrix factorization to calculate WalkDMC. We used regression to assess the relationship between WalkDMC, speed, heart rate, and clinical outcomes.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>WalkDMC was correlated with clinical outcomes, supporting its criterion validity. We observed a quadratic relationship between speed and coactivation: for the paretic extremity, the predicted speed that would lead to the lowest coactivation was ~120% higher than SSS. Slow speeds consistently increased coactivation in controls and participants post-stroke. Coactivation in the paretic extremity was significantly predicted by speed, balance, and impairment.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions:<\/jats:title>\n                    <jats:p>Our results suggest that increased speeds lead to differential improvements in coactivation in the paretic and non-paretic extremities. These results may inform speed prescriptions for HIT interventions.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/15459683251387093","type":"journal-article","created":{"date-parts":[[2025,12,4]],"date-time":"2025-12-04T13:19:57Z","timestamp":1764854397000},"page":"114-126","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":3,"title":["The Differential Effects of Fast Walking Speed on Muscle Coactivation in the Paretic and Non-Paretic Extremities Post-Stroke"],"prefix":"10.1177","volume":"40","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6467-1781","authenticated-orcid":false,"given":"Natalia","family":"S\u00e1nchez","sequence":"first","affiliation":[{"name":"Department of Physical Therapy. Chapman University, Irvine, CA, USA"},{"name":"Department of Electrical Engineering and Computer Science. Chapman University. Irvine, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8122-4529","authenticated-orcid":false,"given":"Andrian","family":"Kuch","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy. Chapman University, Irvine, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Samantha N.","family":"Jeffcoat","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy. Chapman University, Irvine, CA, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8705-3759","authenticated-orcid":false,"given":"Andrew","family":"Hooyman","sequence":"additional","affiliation":[{"name":"Department of Physical Therapy. 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